92557 cpt code - Common CPT Codes for Hearing Evaluation: Here is list of commonly CPT Codes used by healthcare audiologists to treat patients effectively, ... 92557 - Comprehensive ...

 
patients, request CPT codes 92557, When requesting a Baer Testing For CalViva patients, request 92585, 92567, 92588) Newborn Hearing Screen Established patient not seen in 2 years Remember to pre-authorize all codes on an initial referral to Cardiology Please include Echo code If preauthorizing fetal echo, authorize 76827, 76825, and 93325. How to program a universal ge remote to tv

CPT Codes. Medicine Services and Procedures. Special Otorhinolaryngologic Services and Procedures. Vestibular Function Tests, With Recording (eg, ENG) 92517. 92549.CMS chose CPT Codes 92557 and 92567 as typical because they make up 72 percent of all billings for audiologists; and, when all physician and practitioner specialties are considered, including audiologists, code 92557 is billed with code 92567 over 60 percent of the time and code 92567 is billed with code 92557 over 83 percent of the time in the ...CPT 96156 is a code used for health behavior assessment or re-assessment, focusing on factors affecting a patient’s physical health. This article will cover the description, procedure, qualifying circumstances, usage, documentation requirements, billing guidelines, historical information, similar codes, and examples of CPT 96156. 1. What is CPT 96156? CPT …CPT 92507 can be used to describe the treatment provided by a healthcare professional to patients with speech, language, voice, communication, and/or auditory processing disorders. This code is used when the provider directly interacts with the patient to assess their condition and provide therapy to improve their communication abilities. 2.Apr 20, 2007 ... CPT. Description. 92552 PURE TONE AUDIOMETRY (THRESHOLD); AIR ONLY. 92553 PURE TONE AUDIOMETRY (THRESHOLD); AIR AND BONE. 92557. COMPREHENSIVE ...CPT Knowledgebase - Nov 11, 2016 Code 92557, Comprehensive audiometry threshold evaluation and speech recognition (92553 and 92556 combined), is billed. Because this code includes testing on the left side and right side, if one of these components is missing, should modifier 52 be appended to code 92557?When you undergo a medical procedure, there’s a corresponding series of numbers that medical professionals use to document the process. This Current Procedural Terminology code hel...CPT Codes (find a full list online) 92590, Hearing aid exam and selection, monaural. 92591, Hearing aid exam and selection, binaural. 92592, Hearing aid check, monaural. 92593, Hearing aid check, binaural. 92594, …Learn how to report and bill for audiology services using CPT codes, ICD codes, and other codes for diagnostic and therapeutic tests. Find out the specific requirements and …CPT ® code 92557 - This is a comprehensive audiometry evaluation which includes a battery of tests comprised both of the elements of threshold evaluation …screening code, CPT code 92558, as well as the new code descriptors for CPT codes 92587 and 92588. It is recommended that members consult with facility billing departments as well as with third party payors for guidance. Payors may dictate the use of specific diagnosis codes, modifiers, and coverage determinations.Low-code is a way to design and develop applications with little or no coding. It empowers users with little to no technical background. * Required Field Your Name: * Your E-Mail: ...May 1, 2002 · 92557. Comprehensive audiometry threshold evaluation and speech recognition. $44.53. 92567. Tympanometry. $19.91. 92568. Acoustic Reflex Testing. $14.12. 92569. Acoustic Reflex Decay Testing. $15.20. An audiologist performing a CAP evaluation could code in one of two ways depending on the whether or not a speech-language pathology evaluation is ... CPT codes 92553, 92557, 92567 and 92568 may be reported once a month when a beneficiary is receiving ototoxic medications; The following may only be reported once during a session (same date of service) CPT codes 92541, 92542, 92544,92545 and 92546; CPT code 92542 should not be billed two times for two positions or any multiple increments.Below are CPT codes for services that oto-techs may perform the technical component of under direct physician supervision (note that for these CPT codes the physician, non-physician practitioner, or audiologist must perform the professional component of the tests): 92540 – Basic vestibular evaluation, includes spontaneous nystagmus test with ...CPT codes 92547, 92552, 92553, 92555, 92556, 92562, 92563, 92565, 92571, 92572, 92575, 92576, 92577, 92582, 92583, and 92584 are considered technical services only …The following four CPT codes were deleted effective January 1, 2022 . 92559 Audiometric testing of groups. 92560 Bekesy audiometry; screening. 92561 Bekesy audiometry; diagnostic. 92564 Short increment sensitivity index (SISI) ASHA Notes. These codes are being deleted because changes in technology and clinical practice have …Jan 1, 2020 · CPT Assistant states that 92626 "is a time-based code and is reported for the first hour of evaluation. Code 92626 should not be reported for evaluations of auditory function lasting less than 31 minutes. Add-on code 92627 is reported for each additional 15 minutes of evaluation and must be used in conjunction with code 92626 for evaluations ... A description of the new and revised codes follows: CPT Code 92626: Evaluation of auditory function for candidacy or post-operative status of surgically implanted devices or other auditory treatment interventions; first hour. CPT Code 92627: Each additional 15 minutes (list separately in addition to code for primary procedure).CPT Code Descriptor V5010 Conformity evaluation V5299 Hearing service, miscellaneous 92550 Tympanometry and reflex threshold measurements 92553 Pure tone audiometry (threshold); air and bone 92556 Speech audiometry threshold; with speech recognition 92557 Comprehensive audiometry threshold evaluation and speech recognition (92553 andCPT Code: Descriptor: MPFS Final 2021: MIPS Proposed 2022: Difference Final 2021 vs ... 92557: Comprehensive audiometry threshold evaluation and speech recognition (92553 and 92556 ... (List separately in addition to code for primary procedure) $21.07: $21.49: $0.42: 92625: Assessment of tinnitus (includes pitch, loudness matching ...How to Utilize the Current Procedural Terminology ® Codes The Current Procedural Terminology (CPT ®) coding system is the code family composed of a multitude of procedures and services to evaluate patients and manage treatment, including those for cochlear and vestibular functions.The typical CPT ® codes for cochleotoxic …CPT codes 92553, 92557, 92567 and 92568 may be reported once a month when a beneficiary is receiving ototoxic medications • The following may only be reported once …They are all part of HCPS, the Healthcare Common Procedure Coding System. Use 99215 for patients whose appointments are 40 minutes and whose treatment is considered as being of high complexity. Other CPT code severity requirements are listed below: 99212: straightforward. 99213: low. 99214: moderate. 99215: high.9. Similar codes to CPT 97597. Five similar codes to CPT 97597 include: CPT 97598: This code is an add-on code for each additional 20 cm2 or part thereof of total wound surface area, used in conjunction with CPT 97597.; CPT 97602: This code is used for nonselective debridement of wounds without anesthesia, including topical applications, wound …CPT Code 92550, Special Otorhinolaryngologic Services and Procedures, Audiologic Function Tests - Codify by AAPC. Select. Code Sets; Indexes; ... Tubes and adenoids are performed. Pt comes in 30 days later and has audio. Doctor codes 99213, 92557, 92550. Modifier 24 is on OV. Diagnosis is only for the ears. No adenoids mentioned. BCBS is refuCPT Code 92557 92567 92587 92588 92585 92586 92567 92587 92586 N/A N/A 93000 93321 93303 93304 93325 93227 93270 76825 76827 99243 92557 92567 92587 95812 95813 95816 95819 95951 Medi-Cal X4500 ... Service CPT Code Medi-Cal Description Use When NOTES: NON-PROFIT ORG. US POSTAGE PAID FRESNO, CA PERMIT NO. …You’ve probably seen somewhere someone saying coding vs scripting. When I first saw that, I thought that those two are the same things, but the more I learned I found out that ther...When a physician or qualified nonphysician practitioner orders a specific audiological test using the CPT descriptor for the test, only that test may be provided on that order. ... The 2018 National Physician Fee Schedule Relative Value File lists three audiological diagnostic codes, in addition to vestibular function tests (92541-92546, …correctly report the most comprehensive CPT code that describes the service performed, including the most appropriate modifier when required. PI_Coding Policy 0_ General Issue Date: 11/1/20 Revised Date:4/12/2021 3 Coding Sources Definitions CPT – Current Procedural Terminology 4th Edition; an American Medical Association (AMA) maintained ...CPT Code 99204 Reimbursement Rate (Medicare, 2024): $164.38. In the past years, this E/m code has been paid $169.93 by Medicare in 2021. CPT Code 99204 Time Length: 45 – 59 Minutes. An average session length for an initial 99204 evaluation and management session is around 50 minutes.CPT. ®. 92597, Under Evaluative and Therapeutic Otorhinolaryngologic Services. The Current Procedural Terminology (CPT ®) code 92597 as maintained by American Medical Association, is a medical procedural code under the range - Evaluative and Therapeutic Otorhinolaryngologic Services.32557, Under Introduction and Removal Procedures on the Lungs and Pleura. The Current Procedural Terminology (CPT ®) code 32557 as maintained by American Medical Association, is a medical procedural code under the range - Introduction and Removal Procedures on the Lungs and Pleura.Your Medicare Administrative Contractor has a Local Coverage Determination Policy (LCD) in effect that indicates CPT code 92557 (comprehensive audiometry) will not be paid if performed on the same date of service as CPT codes 92540 (basic vestibular evaluation) and 92543 (caloric vestibular test, each irrigation). Voluntary NotificationApr 20, 2007 ... CPT. Description. 92552 PURE TONE AUDIOMETRY (THRESHOLD); AIR ONLY. 92553 PURE TONE AUDIOMETRY (THRESHOLD); AIR AND BONE. 92557. COMPREHENSIVE ... By Anna Marie Jilla and Annette A. Burton. This article is a part of the January/February 2021, Volume 33, Number 1, Audiology Today issue.. Introduction. The American Academy of Audiology (the Academy), together with the American Speech-Language-Hearing Association (ASHA), continuously reviews the CPT code set applicable to audiologists. It seems that 92504 would be included in the E/M coding, but the CPT book says. "Diagnostic or treatment procedures usually included in a comprehensive otorhinolaryngologic evaluation or office visit, are reported as an integrated medical service, using appropriate descriptors from the 99201 series. Itemization of component …CPT code 92557 is the appropriate code for comprehensive audiometric evaluation (CAE) that includes air and bone conduction thresholds, speech thresholds and …CPT Code 92557. CPT 92557 describes comprehensive audiometry threshold evaluation and speech recognition combined. CPT Code 92558. CPT 92558 describes screening … I am new to ENT billing. I am getting denials from Medicare for CPT codes 92588,92504,92550, 92553, 92557, 92567. Denial states procedure code is inconsistent with modifier used or a required modifier... [ Read More ] The Department of Otolaryngology has received numerous denials for CPT codes 92567, 92568 and 92557 when billed together. After further review of these code in the CPT manual. It states that when bi... [ Read More ]92557. Comprehensive audiometry threshold evaluation and speech recognition. $44.53. 92567. Tympanometry. $19.91. 92568. Acoustic Reflex Testing. $14.12. 92569. Acoustic Reflex Decay Testing. $15.20. An audiologist performing a CAP evaluation could code in one of two ways depending on the whether or not a speech-language pathology evaluation is ...If you check the November aap coding newsletter it talks about this test and the cpt code changes that go along with it. 92558 92587 92588 hope this helps. [ Read More ] 92587 vs 92588CPT Code 92557 is a medical procedural code for comprehensive audiometry threshold evaluation and speech recognition. Learn the code guidelines, crosswalks, modifiers, ICD-9-CM codes, and forum discussions related to this code.The new AirVote app lets a small business get instant and valuable customer feedback by using a QR Code for contactless interactions. Customer feedback is now more important than e...Answer. 92557 is valued on the basis of a minimum of octave frequencies from .25 kHz through 8 kHz for air conduction testing, .25 kHz through 4 kHz for bone conduction testing and also includes SRT and word recognition testing. Robert C. Fifer, Ph.D. is currently the Director of Audiology and Speech-Language Pathology at the Mailman Center for ...Save up to 80% today with the top Western Digital coupon codes from PCWorld. 15% off SSDs, hard drives & My Passport. 15% off Western Digital Student Discount. PCWorld’s coupon sec...CPT ® code 92557 - This is a comprehensive audiometry evaluation which includes a battery of tests comprised both of the elements of threshold evaluation …CPT Code 92550, Special Otorhinolaryngologic Services and Procedures, Audiologic Function Tests - Codify by AAPC ... Doctor codes 99213, 92557, 92550. Modifier 24 is ...Low-code is a way to design and develop applications with little or no coding. It empowers users with little to no technical background. * Required Field Your Name: * Your E-Mail: ... The official description of CPT code 92567 is: “Tympanometry (impedance testing)”. 3. Procedure. The 92567 procedure involves the following steps: The provider places an ear probe in the patient’s ear to measure the response of the middle ear to pressure changes. The pressure in the external ear canal is varied to identify the pressure at ... If you purchased your mobile phone through Virgin, it came locked to that network. This means that you cannot use your phone with a different mobile service provider until you get ...Due to annual CPT/HCPC Updates, CPT code G0515 has been deleted from "CPT/HCPCS Codes" section Group 1 and the following new codes were added; 97129 and 97130. The descriptors have been changed for CPT codes 92626 and 92627. 12/19/2019 R5 This article was converted to the new Billing and Coding Article format.In the realm of audiology, Medicare Part B provider participation is often met with grumbling and disdain. With the current restriction of being recognized only for payment for diagnostic procedures, coupled with less than stellar and declining reimbursement and rules that appear to be draconian compared with other payers, there is a misunderstanding about …CPT. ®. 92547, Under Vestibular Function Tests, With Recording (eg, ENG) The Current Procedural Terminology (CPT ®) code 92547 as maintained by American Medical Association, is a medical procedural code under the range - Vestibular Function Tests, With Recording (eg, ENG).specific rates and the CPT code s billed. For example, CPT code 92557 (comprehensive audiometry) will see a 4% decrease to the national payment rate while CPT code 92546 (sinusoidal vertical axis rotational testing) will experience a 1 % increase. As a result, audiologists wishing to determine the actualCPT Code 92556, Special Otorhinolaryngologic Services and Procedures, Audiologic Function Tests - Codify by AAPC ... for many audiology codes ex 92557 there are ...patients, request CPT codes 92557, When requesting a Baer Testing For CalViva patients, request 92585, 92567, 92588) Newborn Hearing Screen Established patient not seen in 2 years Remember to pre-authorize all codes on an initial referral to Cardiology Please include Echo code If preauthorizing fetal echo, authorize 76827, 76825, and 93325CPT Coding: 99213. Office or other outpatient visit, established patient (greater than 50 percent of visit spent counseling and code 99213 has a typical time of 15 minutes) ICD …Medicare classifies CPT code 92557 (comprehensive audiometry) as an “ancillary” service under the OPPS, meaning that it is not separately paid when provided on the same day as other services. ASHA and other stakeholders have repeatedly requested the reclassification of 92557, so that CMS will ...Wiki Medical Necissity for 92557 and 92567, 92550. Thread starter jazmine29; Start date Apr 25, 2012; Create Wiki J. jazmine29 Guest. Messages 15 Best answers 0. Apr 25, 2012 #1 ... The only one of those Audiology codes that have an LCD is the 92567 with CMS Here are some of the payable DX codes 381.81 389.16 389.18 …Your Medicare Administrative Contractor has a Local Coverage Determination Policy (LCD) in effect that indicates CPT code 92557 (comprehensive audiometry) will not be paid if performed on the same date of service as CPT codes 92540 (basic vestibular evaluation) and 92543 (caloric vestibular test, each irrigation). Voluntary NotificationI am new to ENT billing. I am getting denials from Medicare for CPT codes 92588,92504,92550, 92553, 92557, 92567. Denial states procedure code is inconsistent with modifier used or a required modifier... [ Read More ]Individual Current Procedural Terminology codes are available online for free through the CPT Code/Relative Value Search, according to the American Medical Association. It is possi...CPT codes 92547, 92552, 92553, 92555, 92556, 92562, 92563, 92565, 92571, 92572, 92575, 92576, 92577, 92582, 92583, and 92584 are considered technical services only codes and may be reported for services performed in the office setting, clinics, hearing and speech centers, and nursing facilities.92557: 92552, 92553, 92555, 92556: No: No 92563: 92552, 92553: No: No 92568: 92567: No: No 92570: 92550, 92567, 92568: No: No 92587, 92588: 92558: No: …The Department of Otolaryngology has received numerous denials for CPT codes 92567, 92568 and 92557 when billed together. After further review of these code in the CPT manual. It states that when bi... [ Read More ]Coding Audiologic Assessments. Assessing hearing in infants and young children is a routine part of many audiology practices and confusion abounds regarding the appropriate procedure code to report. The following questions and answers provide information about the valuation process for the procedures. Q: When testing an infant …Boost Specificity With HCPCS Codes. Whenever CPT doesn't define a service, you should look to the HCPCS manual for a code. ... (92557, Comprehensive audiometry threshold evaluation and speech recognition [92553 and 92556 combined]) and an HA assessment (92590, ...How to Utilize the Current Procedural Terminology ® Codes The Current Procedural Terminology (CPT ®) coding system is the code family composed of a multitude of procedures and services to evaluate patients and manage treatment, including those for cochlear and vestibular functions.The typical CPT ® codes for cochleotoxic … The official description of CPT code 92567 is: “Tympanometry (impedance testing)”. 3. Procedure. The 92567 procedure involves the following steps: The provider places an ear probe in the patient’s ear to measure the response of the middle ear to pressure changes. The pressure in the external ear canal is varied to identify the pressure at ... The Academy also provides a coding hotline to members for specific questions about coding which can be reached Monday through Friday 7 am- 4 pm MST at 800-584-7773. Additional questions can be submitted to the Health Policy team at [email protected]. Table 1 CPT Code Description Split PC/TC? 92540 ENG …The Current Procedural Terminology (CPT) code range for Special Otorhinolaryngologic Services and Procedures 92550-92597 is a medical code set maintained by the American Medical Association. ... 92557 . 92558 . 92562 . 92563 . On a CPT ® code's hierarchy ...testing. There are many services that do not qualify, including CPT code 92557. For additional details and a definitive list of what procedures technicians can provide and bill, contact your regional Medicare Administrative Contractor (MAC). Does Medicare allow an audiologist to use his/her NPI to bill for "incident to"According to Becker’s Spine Review, under the American Medical Association’s Current Procedural Terminology, or CPT, 20610 is the code for a cortisone injection in the shoulder, si...Each CPT code has five digits (e.g., 92557). Code Lists. Download ASHA's superbill template for a comprehensive list of audiology-related CPT codes and their descriptors. …So, to demonstrate, let us assume that an audiologist performs CPT code 92557, comprehensive air, bone, speech audiometry. The facility values this service as $85. For the fee-for-service model, the insurance company would be billed $85. The insurance company may assume a reasonable and customary fee is $55, in which case they would pay $55 ...What CPT to code? •92557 Comprehensive audiological assessment •92557-52 Comprehensive audiological assessment with reduced services •92567 & 92568 Tympanometry (impedance testing), Acoustic reflex testing, threshold •92550 Tympanometry and reflex threshold measurementsMedicare Denied CPT code 92588. You should not use modifier 51 on any hearing tests, 92588, 92550, or 92557; also, you should not be billing 92550, it is inherent to 92557, comprehensive audiometry; I would be interested in why you ... [ Read More ] Medicare Denied CPT code 92588. I am new to ENT billing.Audiology services furnished to an outpatient of a hospital are covered as “diagnostic services” under section 1861 (s) (2) (C) and payable under the hospital Outpatient Prospective Payment System (OPPS). View the list of audiology services HCPCS codes (ZIP) (updated 11/24/2023). There is no provision in Medicare law to pay audiologists for ...• Use CPT codes to describe the service or treatment. • Choose the CPT procedure code that best describes the services. • Don’t unbundle codes. ... (CPT 92557: frequency 500) ASHA / Negotiating Better Rates Step 2 Determine your top payers-Focus on 3-4 payers = bulk of your reimbursementOct 6, 2022 · *CPT code 69210, (cerumen management) cannot be billed on the same date of service as any audiometric or vestibular tests. ... 92557: 92552, 92553, 92555, 92556 ... In fact, NCCI edits show that 69210 has a modifier “0” status when paired with both 92557 and 92567 — meaning that you should not bill these two services together under any circumstances. Since 69210 is the column 2 code in both edits, you will consider 69210 bundled into each respective service.What CPT to code? •92557 Comprehensive audiological assessment •92557-52 Comprehensive audiological assessment with reduced services •92567 & 92568 Tympanometry (impedance testing), Acoustic reflex testing, threshold •92550 Tympanometry and reflex threshold measurementsSpeech language pathologists should not report CPT codes 97110, 97112, 97150, 97530, or 97129 as unbundled services included in the services coded as 92507, 92508, or 92526. Please note that cognitive therapy by speech-language pathologists is covered in most Medicare Part B Local Coverage Determinations (LCDs). Note: These two new CPT codes will be implemented with the annual January HCPCS update. X 13279.2 The contractor shall apply the same processing logic to new CPT code as applied in CMS CR13055 for Outpatient and Part B claims. SNF TOB 22x and 23x post as PROF : Outpatient TOB 12x and 13x post as TECH ; Outpatient TOB 85x post based on REV codes.

The V72.19 is the correct code for the screening for hearing the problem is the cpt code you used. According to the CPT book 92558 is out of numerical sequence. See cpt codes 92550-92597..... Jc nails santa cruz

92557 cpt code

Lock Picking: The Picker Code - For some professionals, an electric lock pick gun takes the challenge out of lock picking. Learn about lock pick guns and the uses and ethics of loc...The second CI programming code would be billed with a repeat procedure modifier added ( -76: Repeat procedure by same provider; or -77: Repeat procedure by another provider). Billing for pediatric audiology services can be unclear and vary from payer to payer. The guidance below includes a review of both diagnosis and procedure coding.A: Report ICD-10 diagnosis codes at the claim line level of the CPT or HCPCS procedure code to be considered for reimbursement. 4 Q: Why are CPT codes 92588 and 92587 not included in this policy? A: CPT codes 92588 and 92587 are addressed in UnitedHealthcare Community Plan’s Otoacoustical Emissions Testing Policy. Attachments ICD10-CodesCPT. CPT Codes. Medicine Services and Procedures. Special Otorhinolaryngologic Services and Procedures. Treatment of Auditory Processing Disorder. 92507. 92504.Starting in 2020, CPT code 92626 is revised to describe an evaluation of auditory function for surgically implanted device(s) candidacy or post-operative status of a surgically implanted device(s); first hour. CPT code 92627—an add-on code—may be reported in conjunction with 92626 for each additional 15 minutes of the evaluation.Jan 1, 2020 · CPT Assistant states that 92626 "is a time-based code and is reported for the first hour of evaluation. Code 92626 should not be reported for evaluations of auditory function lasting less than 31 minutes. Add-on code 92627 is reported for each additional 15 minutes of evaluation and must be used in conjunction with code 92626 for evaluations ... Apr 7, 2020 ... 92557 COMPREHENSIVE AUDIOMETRY THRESHOLD EVAL ... Beyond the typical service time of the primary procedure in the office or other outpatient.Coding Audiologic Assessments. Assessing hearing in infants and young children is a routine part of many audiology practices and confusion abounds regarding the appropriate procedure code to report. The following questions and answers provide information about the valuation process for the procedures. Q: When testing an infant …Now that the great Y Combinator rush is behind us, we’re returning to a topic many of you really seem to care about: no-code and low-code apps and their development. We’ve explored...CMS did not accept the comments, and CPT code 92557 will remain classified as an “ancillary” service under OPPS. Resources ASHA’s detailed analyses and OPPS and physician fee schedule rates for audiology and speech-language pathology are available online. patients, request CPT codes 92557, 92567, 92588 When requesting a Baer Testing For CalViva patients, request 92585, 92567, 92588) Newborn Hearing Screen Remember to pre-authorize all codes on an initial referral to Cardiology Please include Echo code If preauthorizing fetal echo, authorize 76827, 76825, and 93325 Recommend to pre-authorize all 4 What CPT to code? •92557 Comprehensive audiological assessment •92557-52 Comprehensive audiological assessment with reduced services •92567 & 92568 Tympanometry (impedance testing), Acoustic reflex testing, threshold •92550 Tympanometry and reflex threshold measurementsMay 1, 2002 · 92557. Comprehensive audiometry threshold evaluation and speech recognition. $44.53. 92567. Tympanometry. $19.91. 92568. Acoustic Reflex Testing. $14.12. 92569. Acoustic Reflex Decay Testing. $15.20. An audiologist performing a CAP evaluation could code in one of two ways depending on the whether or not a speech-language pathology evaluation is ... The official description of CPT code 92567 is: “Tympanometry (impedance testing)”. 3. Procedure. The 92567 procedure involves the following steps: The provider places an ear probe in the patient’s ear to measure the response of the middle ear to pressure changes. The pressure in the external ear canal is varied to identify the pressure at ... .

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