Loading...

    Explore
    • Policy Monitoring
    • Live Policy Feed
    • Billing Codes
    • NPI Medicare & Medicaid
    • Healthcare Providers
    • Health Insurance Payers
    • States
    • Service Lines
    • Taxonomy Codes
    Lookup tools
    • Billing Code Lookup
    • CPT Modifier Lookup
    • Provider Taxonomy Code Lookup
    • Healthcare Provider & Facility Lookup
    • Health Insurance Payer Lookup
    • Payer Contact Directory

    Policy & Benchmark Tools

    • Prior Authorization Lookup
    • Coverage Criteria Lookup
    • Timely Filing Lookup
    • Billing Code Reimbursement Rates
    • Payer Comparison Dashboard
    • Facility Comparison Dashboard
    • All tools

    Company

    • About OpenPayer
    • Data Sources
    • Trek Health
    OpenPayerby Trek Health
    LinkedInYouTube

    © 2026 Trek Health. All rights reserved.

    OpenPayer is built and maintained by Trek Health.

    v1.0.30
    OpenPayerBilling CodesOther Procedures on the Neck or ThoraxCPT cpt-21899-unlisted-neck-thorax-procedure
    Ask Trek AI about this page

    CPT 21899: Unlisted Surgical Procedure, Neck or Thorax

    CPT code 21899 is used to report an unlisted surgical procedure of the neck or thorax when no specific CPT code describes the service; this covers operative procedures in the neck or chest region and is typically billed for surgical services performed in an operating room, inpatient, or outpatient surgical facility where a more specific procedure code is not available.

    For related coverage guidance, see recent payer policy updates: Office-based Laryngeal Procedures, Injectable Dermal Fillers and Bulking Agents (for New Mexico Only), Injectable Dermal Fillers and Bulking Agents (for Kentucky Only).

    Customize your policy alerts

    Sign up for cpt 21899 policy alerts

    Get alerted when payer policies referencing 21899 are released or updated.

    Monitor payer policy activity

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

    Table of contents

    Progress1 / 7

    Explore openpayer tools

    • Billing CodesCPT, HCPCS, DRG & more
    • Reimbursement RatesCommercial vs. Medicare rate reports
    • Facility ComparisonBeds, revenue & payer mix
    • ProvidersHospitals & facilities
    • PayersPlans & market footprint
    • Taxonomy CodesNUCC specialty codes
    • ModifiersCPT modifiers & usage
    • Prior AuthorizationPA policies by payer & drug
    • Timely FilingFiling deadlines by payer
    • Coverage CriteriaMedical necessity by payer
    • Payer ContactsClaims, PA & appeals contacts
    View all tools

    Clinical & Coding Specifications

    Clinical Context

    A patient presents with a neck mass and symptoms of dysphagia and intermittent hoarseness after trauma to the lower neck. Imaging (CT scan of the neck and chest) demonstrates an atypical soft tissue lesion involving the lower cervical/upper thoracic inlet that is not described by a specific CPT code. The surgical team (otolaryngology-head and neck surgeon or thoracic surgeon) schedules an operative procedure to excise and/or biopsy the lesion via an open neck approach with possible extension into the superior mediastinum. Preoperative workflow includes history and physical, focused airway assessment, informed consent noting an unlisted procedure, preoperative imaging review, and coordination with anesthesia for potential difficult airway management. Intraoperative workflow includes exploration of the neck and thoracic inlet, identification of critical neurovascular structures, frozen-section pathology if indicated, and possible reconstruction or drain placement. Postoperative workflow includes immediate recovery in PACU, pain control, wound care instructions, pathology follow-up, and scheduling of any adjuvant therapy based on results. Billing uses 21899 for an unlisted procedure of the neck or thorax when no specific CPT code exists for the exact service performed; documentation must clearly describe surgical steps, operative time, personnel, and rationale for using an unlisted code.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    31625Tracheostomy, planned (separate procedure)May be performed before, during, or after neck/thorax exploration for airway control in complex cases.
    21015Excision of lesion of neck (e.g., submandibular, superficial)Codes for specified neck lesion excisions; used when a specific anatomic excision code applies instead of 21899.
    21660Excision of tumor sternum or chest wall (partial)Represents chest wall excision codes when thoracic inlet or chest wall resection is required; used when a specific code exists.
    42800Tonsillectomy and adenoidectomy; younger patients (listed as example ENT service)May be performed concurrently by same specialty when airway pathology involves multiple sites (use appropriate concurrent procedure coding).
    88305Pathology, surgical pathology, gross and microscopic examinationUsed for primary tissue diagnosis from biopsy or excision performed during the unlisted procedure.
    99223Initial hospital care, typically 70 minutes or moreRepresents higher-level inpatient E/M when preoperative or immediate postoperative complexity warrants separate E/M billing per payer rules.

    Related Modifiers

    13 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…
    58Modifier 58 (Staged or related procedure/service by the same physician during the postoperative period) indicates that a subsequent procedure performed by the same provider during the…- Use modifier 58 when the same physician/QHP performs a procedure during the postoperative/global period of an earlier procedure and the subsequent procedure is either planned or anticipated…
    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…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…

    Showing 1–10 of 13

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207X00000X
    208000000X
    207L00000X
    2084P0800X
    207V00000X
    163WX1500X
    1835G0000X
    246ZB0301X

    Related ICD-10-CM Codes

    26 rows

    ICD-10-CM CodeDescription
    C34.11Malignant neoplasm of upper lobe, right bronchus or lung
    C34.90Malignant neoplasm of unspecified part of unspecified bronchus or lung
    D12.3Benign neoplasm of transverse colon
    G44.1Vascular headache, not elsewhere classified
    G44.209Tension-type headache, unspecified, not intractable
    G47.33Obstructive sleep apnea (adult) (pediatric)
    J95.1Acute pulmonary insufficiency following thoracic surgery
    J95.2Acute pulmonary insufficiency following nonthoracic surgery
    J98.01Acute bronchospasm
    J98.4Other disorders of lung

    Showing 1–10 of 26

    Related Payer Policy Updates

    Specialty: Otorhinolaryngology (ENT)1 / 2

    10 rows

    PolicyPayerEffective Date
    Office-based Laryngeal ProceduresPremera Bluecross2026-10-06
    Injectable Dermal Fillers and Bulking Agents (for New Mexico Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking Agents (for Kentucky Only)UnitedHealthcare2026-10-01
    Hearing Aids and Devices Including Wearable, Bone-Anchored, and Semi-Implantable (for Indiana Only)UnitedHealthcare2026-10-01
    Otoacoustic Emissions Testing (for Oxford Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking AgentsUnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking AgentsUnitedHealthcare2026-10-01
    Sinus Surgeries and Interventions (for North Carolina Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking Agents (for Nebraska Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking Agents (for Kansas Only)UnitedHealthcare2026-10-01

    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.
    Published by

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

    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.