HCPCS Level II L8691: Auditory Osseointegrated External Sound Processor, Replacement Only

HCPCS Level II code L8691 describes an auditory osseointegrated device external sound processor, billed for replacement only and excluding the transducer/actuator; the service represents a discrete device supply for a patient's hearing implant system, typically provided as a durable medical equipment/device replacement and furnished in outpatient clinics, audiology centers, or specialty ENT offices where implant-related components are dispensed and fitted.

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HCPCS Level II L8691: Auditory Osseointegrated External Sound Processor, Replacement Only

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Get alerted when payer policies referencing L8691 are released or updated.

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Clinical & Coding Specifications

Clinical Context

A 48-year-old adult with long-standing unilateral conductive hearing loss from chronic otitis media and multiple failed tympanoplasties presents for rehabilitation with an osseointegrated bone conduction system. The patient previously underwent implantation of a percutaneous or transcutaneous abutment with osseointegrated fixture and now requires replacement of the external sound processor. The audiologist documents persistent speech-recognition deficits in noisy environments and confirms that the implanted abutment and internal components are intact on physical and imaging exam. The external sound processor is replaced on the affected side during an outpatient clinic visit. Billing uses the HCPCS Level II code L8691 for the external sound processor replacement. Typical workflow includes pre-visit audiologic verification, device ordering, in-person device exchange and fitting, post-replacement programming and verification with real-ear or aided speech testing, documentation of device serial numbers and warranty status, and note of laterality using modifier LT or RT as applicable. Typical site of service is an outpatient audiology clinic, ambulatory surgery center or hospital outpatient department depending on institutional policy and whether additional surgical services are required.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`92557`	Comprehensive audiometry threshold evaluation and speech recognition	Performed before and after replacement to document audiometric benefit of the new external processor
`92601`	Diagnostic analysis of cochlear implant or other implanted hearing device, patient, any combination of programming, adjustments, or maintenance	Used for programming and adjustments of osseointegrated external sound processors when billable per payer guidance
`92590`	Hearing aid examination and selection; monaural	Used when counseling and selection of the external processor is provided as part of the patient encounter
`97760`	Orthotic(s) and/or prosthetic(s) fitting, adjustment(s) and/or training, upper extremity, lower extremity, and/or trunk, initial encounter	May be used by certified prosthetic/orthotic suppliers for device fitting-related services when applicable
`99070`	Supplies and materials (eg, device replacement parts) provided by the physician over and above those usually included with the office visit	Used for non-routine replacement components or accessories if payer allows billing alongside office visit codes

Related Modifiers

5 rows

Modifier	Description	When to Use
52	Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…	- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
8P	Modifier 8P—Performance Measure Reporting Modifier – Action Not Performed, Reason Not Otherwise Specified— is appended only to CPT Category II quality-reporting codes to indicate that the specified…	- Use modifier -8P only with CPT Category II codes when the quality-measure action was not performed for an eligible patient and there is no documented reason in the medical record for omitting the…
62	Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…	- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
66	Modifier 66 (Surgical Team) is used when three or more surgeons act as primary surgeons on a single, highly complex procedure. The AMA defines it for use when a surgical team — often composed of…	- Use modifier 66 when three or more surgeons act as primary surgeons working collaboratively as a surgical team on a single, highly complex or difficult procedure (for example organ…
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Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
367A00000X	Advanced Practice Midwife	Advanced practice midwifery encompasses the independent provision of care during pregnancy, childbirth, and the postpartum period; sexual and reproduc…
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…
204D00000X	Neuromusculoskeletal Medicine & OMM Physician	The Neuromusculoskeletal Medicine and Osteopathic Manipulative Medicine physician directs special attention to the neuromusculoskeletal system and its…
1710I1003X	Independent Duty Medical Technicians	An Independent Duty Medical Technician (IDMT) is specially trained and educated to perform primary medical care, minor surgical services, and treatmen…
207YP0228X	Pediatric Otolaryngology Physician	A pediatric otolaryngologist has special expertise in the management of infants and children with disorders that include congenital and acquired condi…
282NR1301X	Rural Acute Care Hospital	Hospitals · General Acute Care Hospital
347D00000X	Train	An organization or business licensed to provide passenger train service, including light rail, subway, and traditional services.
261QS1000X	Student Health Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center

Related ICD-10-CM Codes

23 rows

ICD-10-CM Code	Description
B96.89	Other specified bacterial agents as the cause of diseases classified elsewhere
G51.0	Bell's palsy
G51.9	Disorder of facial nerve, unspecified
G90.09	Other idiopathic peripheral autonomic neuropathy
H61.23	Impacted cerumen, bilateral
H81.10	Benign paroxysmal vertigo, unspecified ear
H81.11	Benign paroxysmal vertigo, right ear
H81.13	Benign paroxysmal vertigo, bilateral
H83.09	Labyrinthitis, unspecified ear
H90.11	Conductive hearing loss, unilateral, right ear, with unrestricted hearing on the contralateral side

Showing 1–10 of 23

HCPCS Level II L5000: Partial Foot Shoe Insert with Longitudinal Arch, Toe Filler

HCPCS-L5010-PARTIAL-FOOT-MOLDED-SOCKET-ANKLE-HEIGHT-TOE-FILLER

HCPCS L5010: Partial Foot Molded Socket, Ankle Height, With Toe Filler

HCPCS-L5020-PARTIAL-FOOT-MOLDED-SOCKET-TIBIAL-TUBERCLE-TOE-FILLER

HCPCS L5020: Partial Foot Molded Socket with Toe Filler

HCPCS-L5050-ANKLE-SYMES-MOLDED-SOCKET-SACH-FOOT

HCPCS L5050: Ankle/Symes Molded Socket with SACH Foot

HCPCS-L5060-ANKLE-SYMES-METAL-FRAME-MOLDED-LEATHER-SOCKET-ARTICULATED-ANKLE-FOOT

HCPCS L5060: Ankle/Symes Metal Frame with Molded Leather Socket

HCPCS-L5100-BELOW-KNEE-MOLDED-SOCKET-SHIN-SACH-FOOT

HCPCS Level II L5100: Below-Knee Molded Socket with Shin and SACH Foot

HCPCS-L5105-BELOW-KNEE-PLASTIC-SOCKET-SACH-FOOT

HCPCS L5105: Below-Knee Plastic Socket Prosthesis with SACH Foot

HCPCS-L5150-KNEE-DISARTICULATION-MOLDED-SOCKET-EXTERNAL-KNEE-SACH-FOOT

HCPCS L5150: Knee Disarticulation Molded Socket with External Knee and SACH Foot

HCPCS-L5160-KNEE-DISARTICULATION-MOLDED-SOCKET-BENT-KNEE-SACH-FOOT

HCPCS Level II L5160: Knee Disarticulation Molded Socket, Bent Knee Configuration

HCPCS-L5200-ABOVE-KNEE-MOLDED-SOCKET-SINGLE-AXIS-KNEE-SACH-FOOT

HCPCS Level II L5200: Above-knee Prosthesis with Molded Socket and Single-axis Knee

Showing 1–10 of 472

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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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`92557`	Comprehensive audiometry threshold evaluation and speech recognition	Performed before and after replacement to document audiometric benefit of the new external processor
`92601`	Diagnostic analysis of cochlear implant or other implanted hearing device, patient, any combination of programming, adjustments, or maintenance	Used for programming and adjustments of osseointegrated external sound processors when billable per payer guidance
`92590`	Hearing aid examination and selection; monaural	Used when counseling and selection of the external processor is provided as part of the patient encounter
`97760`	Orthotic(s) and/or prosthetic(s) fitting, adjustment(s) and/or training, upper extremity, lower extremity, and/or trunk, initial encounter	May be used by certified prosthetic/orthotic suppliers for device fitting-related services when applicable
`99070`	Supplies and materials (eg, device replacement parts) provided by the physician over and above those usually included with the office visit	Used for non-routine replacement components or accessories if payer allows billing alongside office visit codes

Related Modifiers

5 rows

Modifier	Description	When to Use
52	Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…	- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
8P	Modifier 8P—Performance Measure Reporting Modifier – Action Not Performed, Reason Not Otherwise Specified— is appended only to CPT Category II quality-reporting codes to indicate that the specified…	- Use modifier -8P only with CPT Category II codes when the quality-measure action was not performed for an eligible patient and there is no documented reason in the medical record for omitting the…
62	Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…	- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
66	Modifier 66 (Surgical Team) is used when three or more surgeons act as primary surgeons on a single, highly complex procedure. The AMA defines it for use when a surgical team — often composed of…	- Use modifier 66 when three or more surgeons act as primary surgeons working collaboratively as a surgical team on a single, highly complex or difficult procedure (for example organ…
[object Object]

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
367A00000X	Advanced Practice Midwife	Advanced practice midwifery encompasses the independent provision of care during pregnancy, childbirth, and the postpartum period; sexual and reproduc…
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…
204D00000X	Neuromusculoskeletal Medicine & OMM Physician	The Neuromusculoskeletal Medicine and Osteopathic Manipulative Medicine physician directs special attention to the neuromusculoskeletal system and its…
1710I1003X	Independent Duty Medical Technicians	An Independent Duty Medical Technician (IDMT) is specially trained and educated to perform primary medical care, minor surgical services, and treatmen…
207YP0228X	Pediatric Otolaryngology Physician	A pediatric otolaryngologist has special expertise in the management of infants and children with disorders that include congenital and acquired condi…
282NR1301X	Rural Acute Care Hospital	Hospitals · General Acute Care Hospital
347D00000X	Train	An organization or business licensed to provide passenger train service, including light rail, subway, and traditional services.
261QS1000X	Student Health Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center

Related ICD-10-CM Codes

23 rows

ICD-10-CM Code	Description
B96.89	Other specified bacterial agents as the cause of diseases classified elsewhere
G51.0	Bell's palsy
G51.9	Disorder of facial nerve, unspecified
G90.09	Other idiopathic peripheral autonomic neuropathy
H61.23	Impacted cerumen, bilateral
H81.10	Benign paroxysmal vertigo, unspecified ear
H81.11	Benign paroxysmal vertigo, right ear
H81.13	Benign paroxysmal vertigo, bilateral
H83.09	Labyrinthitis, unspecified ear
H90.11	Conductive hearing loss, unilateral, right ear, with unrestricted hearing on the contralateral side

Showing 1–10 of 23

HCPCS Level II L5000: Partial Foot Shoe Insert with Longitudinal Arch, Toe Filler

HCPCS-L5010-PARTIAL-FOOT-MOLDED-SOCKET-ANKLE-HEIGHT-TOE-FILLER

HCPCS L5010: Partial Foot Molded Socket, Ankle Height, With Toe Filler

HCPCS-L5020-PARTIAL-FOOT-MOLDED-SOCKET-TIBIAL-TUBERCLE-TOE-FILLER

HCPCS L5020: Partial Foot Molded Socket with Toe Filler

HCPCS-L5050-ANKLE-SYMES-MOLDED-SOCKET-SACH-FOOT

HCPCS L5050: Ankle/Symes Molded Socket with SACH Foot

HCPCS-L5060-ANKLE-SYMES-METAL-FRAME-MOLDED-LEATHER-SOCKET-ARTICULATED-ANKLE-FOOT

HCPCS L5060: Ankle/Symes Metal Frame with Molded Leather Socket

HCPCS-L5100-BELOW-KNEE-MOLDED-SOCKET-SHIN-SACH-FOOT

HCPCS Level II L5100: Below-Knee Molded Socket with Shin and SACH Foot

HCPCS-L5105-BELOW-KNEE-PLASTIC-SOCKET-SACH-FOOT

HCPCS L5105: Below-Knee Plastic Socket Prosthesis with SACH Foot

HCPCS-L5150-KNEE-DISARTICULATION-MOLDED-SOCKET-EXTERNAL-KNEE-SACH-FOOT

HCPCS L5150: Knee Disarticulation Molded Socket with External Knee and SACH Foot

HCPCS-L5160-KNEE-DISARTICULATION-MOLDED-SOCKET-BENT-KNEE-SACH-FOOT

HCPCS Level II L5160: Knee Disarticulation Molded Socket, Bent Knee Configuration

HCPCS-L5200-ABOVE-KNEE-MOLDED-SOCKET-SINGLE-AXIS-KNEE-SACH-FOOT

HCPCS Level II L5200: Above-knee Prosthesis with Molded Socket and Single-axis Knee

Showing 1–10 of 472

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

HCPCS Level II L8691: Auditory Osseointegrated External Sound Processor, Replacement Only

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OpenPayer

HCPCS Level II L8691: Auditory Osseointegrated External Sound Processor, Replacement Only

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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

HCPCS Level II L8691: Auditory Osseointegrated External Sound Processor, Replacement Only

Sign up for hcpcs L8691 policy alerts

HCPCS Level II L8691: Auditory Osseointegrated External Sound Processor, Replacement Only

Sign up for hcpcs L8691 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What does HCPCS code L8691 represent and where is it typically billed?

Which modifiers should be reported with L8691 and when are they used?

What clinical and documentation steps are typically performed when replacing an external sound processor billed with L8691?

What related CPT codes might be billed alongside L8691 for testing, programming, or supplies?

Which ICD-10 diagnosis and encounter codes are commonly associated with L8691 replacements?

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What does HCPCS code L8691 represent and where is it typically billed?

Which modifiers should be reported with L8691 and when are they used?

What clinical and documentation steps are typically performed when replacing an external sound processor billed with L8691?

What related CPT codes might be billed alongside L8691 for testing, programming, or supplies?

Which ICD-10 diagnosis and encounter codes are commonly associated with L8691 replacements?

References