C41.0 Malignant neoplasm of bones of skull and face

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Malignant neoplasm of maxilla (superior)
• Malignant neoplasm of orbital bone

Excludes2 (not included here)

• carcinoma, any type except intraosseous or odontogenic of:
• maxillary sinus (C31.0)
• upper jaw (C03.0)
• malignant neoplasm of jaw bone (lower) (C41.1)

Applies from C41 Malignant neoplasm of bone and articular cartilage of other and unspecified sites

Excludes1 (never code together)

• malignant neoplasm of bones of limbs (C40.-)
• malignant neoplasm of cartilage of ear (C49.0)
• malignant neoplasm of cartilage of eyelid (C49.0)
• malignant neoplasm of cartilage of larynx (C32.3)
• malignant neoplasm of cartilage of limbs (C40.-)
• malignant neoplasm of cartilage of nose (C30.0)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 21 — Lymphoma and Other Cancers
• CMS-HCC V22: HCC 10 — Lymphoma and Other Cancers
• RxHCC V08: HCC 22 — Prostate, Breast, Bladder, and Other Cancers and Tumors
• ESRD V24: HCC 10

MS-DRG index

Defines the logic of DRG(s) 542-544 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 170.0 Malignant neoplasm of bones of skull and face, except mandible

Code annotations containing back-references to C41.0

Back-references to C41.0

• Type 2 Excludes: C03 Malignant neoplasm of gum ("malignant odontogenic neoplasms (C41.0-C41.1)")
• Type 1 Excludes: C30.0 Malignant neoplasm of nasal cavity ("malignant neoplasm of nasal bone (C41.0)")
• Type 1 Excludes: C30.0 Malignant neoplasm of nasal cavity ("malignant neoplasm of turbinates (C41.0)")
• Type 1 Excludes: C30.1 Malignant neoplasm of middle ear ("malignant neoplasm of bone of ear (meatus) (C41.0)")
• Type 2 Excludes: C41.1 Malignant neoplasm of mandible ("malignant neoplasm of upper jaw bone (C41.0)")
• Type 1 Excludes: C69.6 Malignant neoplasm of orbit ("malignant neoplasm of orbital bone (C41.0)")

Back-references to C41

• Type 1 Excludes: C49 Malignant neoplasm of other connective and soft tissue ("articular (C40-C41)")
• Code First: M90.6 Osteitis deformans in neoplastic diseases ("the neoplasm (C40.-, C41.-)")

Diagnosis Index entries for C41.0

• Adamantinoma › malignant › jaw (bone) (lower) › upper
• Ameloblastoma › malignant › jaw (bone) (lower) › upper
• Carcinoma (malignant) › ameloblastic › upper jaw (bone)
• Carcinoma (malignant) › intraosseous › upper jaw (bone)
• Carcinoma (malignant) › odontogenic › upper jaw (bone)
• Fibrosarcoma › ameloblastic › upper jaw (bone)
• Fibrosarcoma › odontogenic › upper jaw (bone)
• Odontosarcoma, ameloblastic › upper jaw (bone)
• Sarcoma (of) › ameloblastic › upper jaw (bone)
• Sarcoma (of) › odontogenic › upper jaw (bone)
• Tumor › odontogenic (adenomatoid) (benign) (calcifying epithelial) (keratocystic) (squamous) › malignant › upper jaw (bone)

Nearby codes

• C41 Malignant neoplasm of bone and articular cartilage of other and unspecified sites
• C41.0 Malignant neoplasm of bones of skull and face (this code)
• C41.1 Malignant neoplasm of mandible
• C41.2 Malignant neoplasm of vertebral column
• C41.3 Malignant neoplasm of ribs, sternum and clavicle
• C41.4 Malignant neoplasm of pelvic bones, sacrum and coccyx
• C41.9 Malignant neoplasm of bone and articular cartilage, unspecified