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    v1.0.28
    OpenPayerBilling CodesExcision Procedures on the HeadCPT cpt-21070-coronoidectomy-mandible-excision
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    CPT 21070: Partial or Complete Coronoidectomy of Mandible

    Medicare pays $552 on average nationally for this procedure.

    CPT code 21070 describes an open surgical partial or complete coronoidectomy of the mandible to remove the coronoid process for indications such as trauma, ankylosis, or arthritis; the service is a surgical procedure of the mandible typically performed in an operating room or outpatient surgical center under general or regional anesthesia.

    For related coverage guidance, see recent payer policy updates: Oral Cancer Screening and Testing, Hearing Services - General, Cochlear Implants.

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    Table of contents

    Progress1 / 7

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    Clinical & Coding Specifications

    Clinical Context

    A 42-year-old male is evaluated after progressive limitation of mandibular opening and recurrent jaw pain following prior midface trauma and radiographic evidence of an elongated coronoid process with impingement on the zygomatic arch. Conservative measures including physical therapy and medical management failed to restore function. The oral and maxillofacial surgeon schedules an open partial coronoidectomy under general anesthesia to remove the coronoid process and release mechanical obstruction, restore mouth opening, and treat post-traumatic ankylosis.

    Preoperative workflow includes history and physical, focused head and neck exam, trismus measurement (maximum interincisal opening), facial CT or panoramic imaging for operative planning, informed consent, anesthesia pre-op evaluation, and coordination with dental or maxillofacial support staff. Intraoperatively the surgeon performs an intraoral or extraoral approach, isolates relevant neurovascular structures, performs partial or complete coronoid resection, achieves hemostasis, and ensures adequate mouth opening. Immediate postoperative care includes airway monitoring, pain control, oral hygiene instructions, and referral to physical therapy for jaw range-of-motion exercises. Typical Site of Service: hospital outpatient operating room or ambulatory surgical center; inpatient setting if combined with other major procedures or if postoperative monitoring indicates.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    21070Partial or complete coronoidectomy, openPrimary procedure to remove coronoid process; addresses mechanical impingement or ankylosis.
    21060Excision of tumor or lesion of infratemporal region, extraoral approach (example)May be performed when pathology adjacent to coronoid requires resection; relates anatomically.
    21020Excision of benign tumor or cyst of mandible; intra-oral approachMay be performed for concurrent mandibular pathology requiring access near coronoid process.
    70110Radiologic exam, CT of maxillofacial bonesPreoperative imaging commonly used for planning coronoidectomy (note: radiology CPT chosen for context).
    21120Reconstruction of mandibular symphysis or body with bone graftMay be performed in staged or combined reconstruction when coronoidectomy is part of broader mandibular surgery.

    Related Modifiers

    13 rows

    ModifierDescriptionWhen to Use
    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…
    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…
    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…
    79Modifier 79 indicates a surgical procedure performed during the postoperative global period of a prior surgery that is unrelated to the original procedure. Per AMA/CPT and CMS guidance, it is…- Use modifier 79 when the same physician (or same‑specialty physician in the same group) performs a surgical procedure during the postoperative global period of a prior surgery and the new procedure…
    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…

    Showing 1–10 of 13

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    208D00000XGeneral Practice PhysicianA physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
    2084S0012XSleep Medicine (Psychiatry & Neurology) PhysicianA Psychiatrist or Neurologist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessme…
    3140N1450XPediatric Skilled Nursing FacilityA nursing care facility designed and staffed for the provision of nursing care and appropriate educational and habilitative/rehabilitative services to…
    2080I0007XPediatric Clinical & Laboratory Immunology PhysicianA pediatrician who specializes in clinical and laboratory immunology disease management.
    163WP0809XAdult Psychiatric/Mental Health Registered NurseNursing Service Providers · Registered Nurse
    1223P0106XOral and Maxillofacial Pathology DentistryThe specialty of dentistry and discipline of pathology that deals with the nature, identification, and management of diseases affecting the oral and m…
    364SA2100XAcute Care Clinical Nurse SpecialistPhysician Assistants & Advanced Practice Nursing Providers · Clinical Nurse Specialist
    202C00000XIndependent Medical Examiner PhysicianA special evaluator not involved with the medical care of the individual examinee that impartially evaluates the care being provided by other practiti…

    Related ICD-10-CM Codes

    19 rows

    ICD-10-CM CodeDescription
    G47.63Sleep related bruxism
    M19.90Unspecified osteoarthritis, unspecified site
    M19.91Primary osteoarthritis, unspecified site
    M26.20Unspecified anomaly of dental arch relationship
    M26.23Excessive horizontal overlap
    M26.24Reverse articulation
    M26.25Anomalies of interarch distance
    M26.29Other anomalies of dental arch relationship
    M26.4Malocclusion, unspecified
    M26.69Other specified disorders of temporomandibular joint

    Showing 1–10 of 19

    Related Payer Policy Updates

    Specialty: Otorhinolaryngology (ENT)1 / 2

    4 rows

    PolicyPayerEffective Date
    Oral Cancer Screening and TestingOscar Health2026-10-01
    Hearing Services - GeneralAlabama Medicaid2026-09-14
    Cochlear ImplantsBlue Cross Blue Shield - Rhode Island2026-09-01
    Balloon Dilation of the Eustachian TubeBlue Cross Blue Shield - Rhode Island2026-09-01

    Related Codes

    CPT-21011-FACE-SCALP-SOFT-TISSUE-TUMOR-EXCISION-LESS-THAN-2CM

    CPT 21011: Excision of Small Subcutaneous Soft Tissue Tumor, Face/Scalp

    CPT-21012-SOFT-TISSUE-TUMOR-EXCISION-FACE-SCALP

    CPT 21012: Excision of Soft Tissue Tumor, Face or Scalp

    CPT-21013-SOFT-TISSUE-TUMOR-EXCISION-FACE-SCALP

    CPT 21013: Excision of Soft Tissue Tumor, Face or Scalp

    CPT-21014-SOFT-TISSUE-TUMOR-EXCISION-FACE-SCALP

    CPT 21014: Excision of Soft Tissue Tumor of Face or Scalp

    CPT-21015-RADICAL-EXCISION-FACE-SCALP-TUMOR

    CPT 21015: Radical Excision of Tumor from Face or Scalp

    CPT-21016-EXTENSIVE-EXCISION-SOFT-TISSUE-TUMOR-FACE-SCALP

    CPT 21016: Excision of Soft Tissue Malignant Tumor, Face/Scalp, ≥2 cm

    CPT-21025-MANDIBULAR-OSTEOMYELITIS-DEBRIDEMENT

    CPT 21025: Debridement for Mandibular Osteomyelitis

    CPT-21026-FACIAL-BONE-OSTEOMYELITIS-EXCISION

    CPT 21026: Excision/Debridement of Infected Facial Bone

    CPT-21029-BONE-TUMOR-CONTOURING-RESHAPING

    CPT 21029: Removal of Benign Bone Lesion by Contouring

    CPT-21030-ENUCLEATION-CURETTAGE-BENIGN-MAXILLARY-ZYGOMA-TUMOR

    CPT 21030: Enucleation/Curettage of Upper Jaw and Cheekbone

    Showing 1–10 of 22

    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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