CPT 92639: Probe Microphone Measurement for Hearing Aid Verification

CPT code 92639 is an add-on procedure for hearing aid fitting or follow-up that documents in-ear probe microphone measurements of the sound delivered by a hearing aid using a small microphone to verify that the device is delivering appropriate amplification; service type: hearing aid verification/validation, typical site of service: audiology clinic or ENT office during a hearing aid fitting or follow-up visit.

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CPT 92639: Probe Microphone Measurement for Hearing Aid Verification

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Get alerted when payer policies referencing 92639 are released or updated.

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Receive email alerts as soon as relevant payer policies are published or updated.

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult or pediatric hearing aid user who presents for a routine hearing aid fitting or scheduled follow-up after amplification has been programmed. The patient may report problems such as poor sound quality, inconsistent speech understanding, feedback, or difficulty in specific listening environments. The clinical workflow begins with a history and basic otoscopic ear canal inspection, followed by real‑ear measurement using a probe microphone while the hearing aid is in place and delivering amplification. The provider verifies that the hearing aid output matches the prescriptive target (for example, NAL‑NL2 or DSL) across frequencies and listening levels. Adjustments to hearing aid gain, output, or program settings are made as indicated, and repeat real‑ear measurements may be performed to confirm corrected performance. Documentation includes the reason for testing, device make/model and serial number, probe microphone placement, prescriptive target, measured Real‑Ear Unaided Response (REUR) if performed, measured Real‑Ear Aided Response (REAR) or Real‑Ear Insertion Gain (REIG), comparison to target, adjustments made, and patient or caregiver counseling on device use and verification results.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`92557`	Comprehensive audiometry threshold evaluation and speech recognition (pure tone and speech audiometry)	Performed before hearing aid fitting to document hearing thresholds and speech understanding used to select amplification targets.
`92590`	Hearing aid check	A functional check of the hearing aid that may be performed prior to or instead of probe‑mic verification for device troubleshooting.
`92626`	Evaluation of cochlear implant (reprogramming)	Related electrophysical/device management code for implantable devices; separate pathway when implantable amplification is present.
`92640`	Optimum device selection and fitting — hearing aid service; electronic analysis of hearing aid component, monaural	Laboratory or bench testing of hearing aid electronics that complements in‑ear verification.
`97760`	Orthotic management and training, lower extremity (used as an example of device training)	Data not available in the input.

Related Modifiers

5 rows

Modifier	Description	When to Use
59	Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…	- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
25	CPT modifier 25 indicates that on the same day as another procedure or service, the same physician or other qualified health care professional provided a significant, separately identifiable…	- When to apply: Use modifier 25 only on an E/M code to indicate the same provider delivered a significant, separately identifiable E/M service on the same day as another procedure or service — i.e.,…
26	Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…	- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
33	Modifier 33 was created by the American Medical Association in response to the Affordable Care Act to identify services provided for preventive intent. It is appended to CPT/HCPCS codes that could be…	- Use modifier -33 when a CPT/HCPCS service that can be billed as either preventive or diagnostic/treatment is provided with preventive intent and aligns with USPSTF A or B recommendations or other…
22	Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…	- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207L00000X	Anesthesiology Physician	An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
207RP1001X	Pulmonary Disease Physician	An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational an…
208D00000X	General Practice Physician	A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
3336C0004X	Compounding Pharmacy	A pharmacy that specializes in the preparation of components into a drug preparation as the result of a Practitioner's Prescription Drug Order or init…
261QI0500X	Infusion Therapy Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center
163WD1100X	Peritoneal Dialysis Registered Nurse	Nursing Service Providers · Registered Nurse
183500000X	Pharmacist	An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. The practice of pharmacy includes, but is no…
364SP0808X	Psychiatric/Mental Health Clinical Nurse Specialist	Physician Assistants & Advanced Practice Nursing Providers · Clinical Nurse Specialist

Related ICD-10-CM Codes

21 rows

ICD-10-CM Code	Description
B95.4	Other streptococcus as the cause of diseases classified elsewhere
G51.0	Bell's palsy
H90.0	Conductive hearing loss, bilateral
H90.11	Conductive hearing loss, unilateral, right ear, with unrestricted hearing on the contralateral side
H90.12	Conductive hearing loss, unilateral, left ear, with unrestricted hearing on the contralateral side
H90.3	Sensorineural hearing loss, bilateral
H90.41	Sensorineural hearing loss, unilateral, right ear, with unrestricted hearing on the contralateral side
H90.42	Sensorineural hearing loss, unilateral, left ear, with unrestricted hearing on the contralateral side
H90.5	Unspecified sensorineural hearing loss
H90.6	Mixed conductive and sensorineural hearing loss, bilateral

Showing 1–10 of 21

CPT 92601: Cochlear Implant Analysis and Programming, Patient <7

CPT-92602-COCHLEAR-IMPLANT-REPROGRAMMING-PEDIATRIC

CPT 92602: Cochlear Implant Reprogramming, Patient <7 Years

CPT-92603-COCHLEAR-IMPLANT-ANALYSIS-AND-PROGRAMMING

CPT 92603: Cochlear Implant Programming and Patient Counseling

CPT-92604-COCHLEAR-IMPLANT-REPROGRAMMING

CPT 92604: Cochlear Implant Reprogramming, Age 7 and Older

CPT-92605-AAC-DEVICE-EVALUATION-ONE-HOUR

CPT 92605: Evaluation for Non–Speech–Generating Communication Device

CPT-92606-ASSISTIVE-COMMUNICATION-DEVICE-TRAINING-CAREGIVER-INSTRUCTION

CPT 92606: Therapeutic Training for Non‑Speech Generating Device

CPT-92607-SPEECH-GENERATING-DEVICE-EVALUATION-FIRST-HOUR

CPT 92607: Evaluation for Speech‑Generating Device, First Hour

CPT-92608-SPEECH-GENERATING-DEVICE-ADDITIONAL-30-MIN-EVAL

CPT 92608: Additional 30-Minute Speech‑Generating Device Evaluation

CPT-92609-SPEECH-GENERATING-DEVICE-THERAPY-CAREGIVER-TRAINING

CPT 92609: Therapeutic Training for Speech‑Generating Device

CPT-92610-SPECIAL-OTORHINOLARYNGOLOGIC-PROCEDURE-SWALLOWING-EVALUATION

CPT 92610: Special Otolaryngologic Procedure for Swallowing Evaluation

Showing 1–10 of 37

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`92557`	Comprehensive audiometry threshold evaluation and speech recognition (pure tone and speech audiometry)	Performed before hearing aid fitting to document hearing thresholds and speech understanding used to select amplification targets.
`92590`	Hearing aid check	A functional check of the hearing aid that may be performed prior to or instead of probe‑mic verification for device troubleshooting.
`92626`	Evaluation of cochlear implant (reprogramming)	Related electrophysical/device management code for implantable devices; separate pathway when implantable amplification is present.
`92640`	Optimum device selection and fitting — hearing aid service; electronic analysis of hearing aid component, monaural	Laboratory or bench testing of hearing aid electronics that complements in‑ear verification.
`97760`	Orthotic management and training, lower extremity (used as an example of device training)	Data not available in the input.

Related Modifiers

5 rows

Modifier	Description	When to Use
59	Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…	- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
25	CPT modifier 25 indicates that on the same day as another procedure or service, the same physician or other qualified health care professional provided a significant, separately identifiable…	- When to apply: Use modifier 25 only on an E/M code to indicate the same provider delivered a significant, separately identifiable E/M service on the same day as another procedure or service — i.e.,…
26	Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…	- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
33	Modifier 33 was created by the American Medical Association in response to the Affordable Care Act to identify services provided for preventive intent. It is appended to CPT/HCPCS codes that could be…	- Use modifier -33 when a CPT/HCPCS service that can be billed as either preventive or diagnostic/treatment is provided with preventive intent and aligns with USPSTF A or B recommendations or other…
22	Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…	- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207L00000X	Anesthesiology Physician	An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
207RP1001X	Pulmonary Disease Physician	An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational an…
208D00000X	General Practice Physician	A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
3336C0004X	Compounding Pharmacy	A pharmacy that specializes in the preparation of components into a drug preparation as the result of a Practitioner's Prescription Drug Order or init…
261QI0500X	Infusion Therapy Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center
163WD1100X	Peritoneal Dialysis Registered Nurse	Nursing Service Providers · Registered Nurse
183500000X	Pharmacist	An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. The practice of pharmacy includes, but is no…
364SP0808X	Psychiatric/Mental Health Clinical Nurse Specialist	Physician Assistants & Advanced Practice Nursing Providers · Clinical Nurse Specialist

Related ICD-10-CM Codes

21 rows

ICD-10-CM Code	Description
B95.4	Other streptococcus as the cause of diseases classified elsewhere
G51.0	Bell's palsy
H90.0	Conductive hearing loss, bilateral
H90.11	Conductive hearing loss, unilateral, right ear, with unrestricted hearing on the contralateral side
H90.12	Conductive hearing loss, unilateral, left ear, with unrestricted hearing on the contralateral side
H90.3	Sensorineural hearing loss, bilateral
H90.41	Sensorineural hearing loss, unilateral, right ear, with unrestricted hearing on the contralateral side
H90.42	Sensorineural hearing loss, unilateral, left ear, with unrestricted hearing on the contralateral side
H90.5	Unspecified sensorineural hearing loss
H90.6	Mixed conductive and sensorineural hearing loss, bilateral

Showing 1–10 of 21

CPT 92601: Cochlear Implant Analysis and Programming, Patient <7

CPT-92602-COCHLEAR-IMPLANT-REPROGRAMMING-PEDIATRIC

CPT 92602: Cochlear Implant Reprogramming, Patient <7 Years

CPT-92603-COCHLEAR-IMPLANT-ANALYSIS-AND-PROGRAMMING

CPT 92603: Cochlear Implant Programming and Patient Counseling

CPT-92604-COCHLEAR-IMPLANT-REPROGRAMMING

CPT 92604: Cochlear Implant Reprogramming, Age 7 and Older

CPT-92605-AAC-DEVICE-EVALUATION-ONE-HOUR

CPT 92605: Evaluation for Non–Speech–Generating Communication Device

CPT-92606-ASSISTIVE-COMMUNICATION-DEVICE-TRAINING-CAREGIVER-INSTRUCTION

CPT 92606: Therapeutic Training for Non‑Speech Generating Device

CPT-92607-SPEECH-GENERATING-DEVICE-EVALUATION-FIRST-HOUR

CPT 92607: Evaluation for Speech‑Generating Device, First Hour

CPT-92608-SPEECH-GENERATING-DEVICE-ADDITIONAL-30-MIN-EVAL

CPT 92608: Additional 30-Minute Speech‑Generating Device Evaluation

CPT-92609-SPEECH-GENERATING-DEVICE-THERAPY-CAREGIVER-TRAINING

CPT 92609: Therapeutic Training for Speech‑Generating Device

CPT-92610-SPECIAL-OTORHINOLARYNGOLOGIC-PROCEDURE-SWALLOWING-EVALUATION

CPT 92610: Special Otolaryngologic Procedure for Swallowing Evaluation

Showing 1–10 of 37

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

OpenPayer

CPT 92639: Probe Microphone Measurement for Hearing Aid Verification

Sign up for cpt 92639 policy alerts

OpenPayer

CPT 92639: Probe Microphone Measurement for Hearing Aid Verification

Sign up for cpt 92639 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

References

CPT 92639: Probe Microphone Measurement for Hearing Aid Verification

Sign up for cpt 92639 policy alerts

CPT 92639: Probe Microphone Measurement for Hearing Aid Verification

Sign up for cpt 92639 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What is CPT 92639 used for?

What clinical steps are included in the workflow for 92639?

What documentation elements should be present when reporting 92639?

How does 92639 relate to other audiology CPT codes listed?

Which diagnoses or encounter codes commonly accompany 92639?

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What is CPT 92639 used for?

What clinical steps are included in the workflow for 92639?

What documentation elements should be present when reporting 92639?

How does 92639 relate to other audiology CPT codes listed?

Which diagnoses or encounter codes commonly accompany 92639?

References