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    v1.0.30
    OpenPayerBilling CodesOther Procedures of the Temporal Bone Middle Fossa ApproachCPT cpt-69979-temporal-bone-auditory-system-procedure-unlisted
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    CPT 69979: Unlisted Temporal Bone Procedure, Auditory System

    CPT code 69979 is used to report an unlisted temporal bone procedure within the auditory system for operations that lack a specific CPT descriptor; this code represents specialty surgical services on the temporal bone or related auditory structures, typically performed by otolaryngology or neurotology surgeons as an operative procedure in an inpatient hospital operating room or outpatient surgical setting such as an ambulatory surgery center.

    For related coverage guidance, see recent payer policy updates: Clinical Review Criteria Intraoperative Neurophysiological Monitoring (IONM), Remote Electrical Neuromodulation for Migraines (i.e., Nerivio®), Lumbar Microdiscectomy.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 54-year-old patient with chronic mastoiditis and persistent conductive hearing loss is scheduled for a temporal bone exploratory procedure under general anesthesia. The patient presents after recurrent infections and failed conservative management including antibiotics and myringotomy. Preoperative evaluation includes audiometry, CT scan of the temporal bones to delineate mastoid air cell involvement, and standard pre-anesthesia testing. Intraoperatively the otologic surgeon performs an atypical temporal bone procedure that does not have a specific CPT code — for example, an uncommon external auditory canal reconstruction with partial mastoid debridement and bone work to address atypical disease or anatomic variants. The procedure is documented in the operative note with details about the surgical approach, extent of bone removal, reconstruction steps, estimated blood loss, anesthesia time, and postoperative plans.

    Postoperative workflow includes immediate recovery in PACU, pain control, wound care instructions, follow-up audiometry when healing allows, and an early clinic visit to assess incisions and hearing status. Billing uses 69979 to report the unlisted temporal bone procedure; appropriate modifiers (e.g., 26 for professional component if imaging interpretation is billed separately, RT for right side) are appended as applicable. A detailed operative report is retained to support medical necessity and code selection.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    69620Mastoidectomy, with tympanoplasty (canal wall down), any techniqueOften performed for chronic mastoid disease; may be an alternative with defined code when standard techniques apply.
    69714Tympanoplasty, with ossicular chain reconstruction, partial or totalPerformed when middle ear reconstruction is required in conjunction with temporal bone work.
    69930Insertion of middle ear implant, with or without mastoidectomyPerformed when implantable hearing devices are placed during temporal bone procedures.
    69310Mastoidectomy; simple (with or without tympanostomy tube)Related mastoid procedure for limited disease; may be performed before or instead of an unlisted procedure.
    76882Ultrasound, small parts other than head/neck, real time with image documentationOccasionally used intraoperatively or preoperatively to evaluate soft tissue, billing may accompany otologic procedures when performed.
    95940Continuous intraoperative neurophysiology monitoring, multiple techniques

    Related Modifiers

    14 rows

    ModifierDescriptionWhen to Use
    22Modifier –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…
    26Modifier 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…
    50Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…
    51Modifier –51 (Multiple Procedures) is used when the same provider performs multiple procedures in the same session to identify secondary, non‑exempt procedures and indicate payment reduction logic…- Use modifier -51 when the same provider performs multiple distinct procedures during the same patient encounter: report the highest‑valued procedure first (no modifier) and append -51 to…
    52Modifier ‑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…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    54Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
    55Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…
    62Modifier 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…
    66Modifier 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…

    Showing 1–10 of 14

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    2080P0206X
    2086S0127X
    363L00000X
    156FC0801X
    207QD0401X
    2081P2900X
    207XX0005X
    111NS0005X

    Related Payer Policy Updates

    Specialty: Neurology/Neurosurgery1 / 2

    10 rows

    PolicyPayerEffective Date
    Clinical Review Criteria Intraoperative Neurophysiological Monitoring (IONM)Kaiser Permanente2027-01-01
    Remote Electrical Neuromodulation for Migraines (i.e., Nerivio®)bcbsvermont2026-11-01
    Lumbar Microdiscectomyuniverahealthcare2026-10-15
    Artificial Cervical Intervertebral Discuniverahealthcare2026-10-15
    Lumbar Decompressionuniverahealthcare2026-10-15
    Responsive Neurostimulation for Focal EpilepsyPremera Bluecross2026-10-14
    Intraoperative MonitoringProvidence Health Plan2026-10-01
    Intraoperative MonitoringProvidence Health Plan2026-10-01
    High-Intensity Focused UltrasoundMass General Brigham Health Plan2026-10-01
    Vagal Nerve StimulationAmbetter Nevada2026-10-01

    Frequently Asked Questions

    References

    1. 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. 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. 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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    May be used when neural monitoring is required during complex temporal bone or skull base surgery and billed separately.