ICD-10-CM Table of Neoplasms — M
Find the site first, then the column matching the behavior stated in the diagnosis. Behavior must come from the pathology report, not from the site alone.
73 entries.
| Term | Codes by circumstance |
|---|---|
| Mackenrodt's ligament | Malignant, primary:C57.7Malignant, secondary:C79.82Ca in situ:D07.39Benign:D28.7Uncertain behavior:D39.8Unspecified behavior:D49.59 |
| malar | Malignant, primary:C41.0Malignant, secondary:C79.51Uncertain behavior:D48.0Unspecified behavior:D49.2 |
| mandible | Malignant, primary:C41.1Malignant, secondary:C79.51Uncertain behavior:D48.0Unspecified behavior:D49.2 |
| mandible, alveolar, mucosa (carcinoma) | Malignant, primary:C03.1Malignant, secondary:C79.89Ca in situ:D00.03Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mandible, alveolar, ridge or process | Malignant, primary:C41.1Malignant, secondary:C79.51Uncertain behavior:D48.0Unspecified behavior:D49.2 |
| marrow NEC (bone) | Malignant, primary:C96.9Malignant, secondary:C79.52Uncertain behavior:D47.9Unspecified behavior:D49.89 |
| mastectomy site (skin) | Malignant, primary:C44.501Malignant, secondary:C79.2 |
| mastectomy site (skin), specified as breast tissue | Malignant, secondary:C79.81 |
| mastoid (air cells) (antrum) (cavity) | Malignant, primary:C30.1Malignant, secondary:C78.39Ca in situ:D02.3Benign:D14.0Uncertain behavior:D38.5Unspecified behavior:D49.1 |
| mastoid (air cells) (antrum) (cavity), bone or process | Malignant, primary:C41.0Malignant, secondary:C79.51Uncertain behavior:D48.0Unspecified behavior:D49.2 |
| maxilla, maxillary (superior) | Malignant, primary:C41.0Malignant, secondary:C79.51Uncertain behavior:D48.0Unspecified behavior:D49.2 |
| maxilla, maxillary (superior), alveolar, mucosa | Malignant, primary:C03.0Malignant, secondary:C79.89Ca in situ:D00.03Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| maxilla, maxillary (superior), alveolar, ridge or process (carcinoma) | Malignant, primary:C41.0Malignant, secondary:C79.51Uncertain behavior:D48.0Unspecified behavior:D49.2 |
| maxilla, maxillary (superior), antrum | Malignant, primary:C31.0Malignant, secondary:C78.39Ca in situ:D02.3Benign:D14.0Uncertain behavior:D38.5Unspecified behavior:D49.1 |
| maxilla, maxillary (superior), carcinoma | Malignant, primary:C03.0Malignant, secondary:C79.51 |
| maxilla, maxillary (superior), sinus | Malignant, primary:C31.0Malignant, secondary:C78.39Ca in situ:D02.3Benign:D14.0Uncertain behavior:D38.5Unspecified behavior:D49.1 |
| meatus external (ear) | Malignant, secondary:C79.2Uncertain behavior:D48.5Unspecified behavior:D49.2 |
| Meckel diverticulum, malignant | Malignant, primary:C17.3Malignant, secondary:C78.4Ca in situ:D01.49Benign:D13.39Uncertain behavior:D37.2Unspecified behavior:D49.0 |
| mediastinum, mediastinal | Malignant, primary:C38.3Malignant, secondary:C78.1Benign:D15.2Uncertain behavior:D38.3Unspecified behavior:D49.89 |
| mediastinum, mediastinal, anterior | Malignant, primary:C38.1Malignant, secondary:C78.1Benign:D15.2Uncertain behavior:D38.3Unspecified behavior:D49.89 |
| mediastinum, mediastinal, posterior | Malignant, primary:C38.2Malignant, secondary:C78.1Benign:D15.2Uncertain behavior:D38.3Unspecified behavior:D49.89 |
| medulla, adrenal | Ca in situ:D09.3Unspecified behavior:D49.7 |
| medulla, oblongata | Malignant, primary:C71.7Malignant, secondary:C79.31Benign:D33.1Uncertain behavior:D43.1Unspecified behavior:D49.6 |
| meibomian gland | Malignant, secondary:C79.2Uncertain behavior:D48.5Unspecified behavior:D49.2 |
| meibomian gland, basal cell carcinoma | — |
| meibomian gland, sebaceous cell | — |
| meibomian gland, specified type NEC | — |
| meibomian gland, squamous cell carcinoma | — |
| meninges | Malignant, primary:C70.9Malignant, secondary:C79.49Benign:D32.9Uncertain behavior:D42.9Unspecified behavior:D49.7 |
| meninges, brain | Malignant, primary:C70.0Malignant, secondary:C79.32Benign:D32.0Uncertain behavior:D42.0Unspecified behavior:D49.7 |
| meninges, cerebral | Malignant, primary:C70.0Malignant, secondary:C79.32Benign:D32.0Uncertain behavior:D42.0Unspecified behavior:D49.7 |
| meninges, cranial | Malignant, primary:C70.0Malignant, secondary:C79.32Benign:D32.0Uncertain behavior:D42.0Unspecified behavior:D49.7 |
| meninges, intracranial | Malignant, primary:C70.0Malignant, secondary:C79.32Benign:D32.0Uncertain behavior:D42.0Unspecified behavior:D49.7 |
| meninges, spinal (cord) | Malignant, primary:C70.1Malignant, secondary:C79.49Benign:D32.1Uncertain behavior:D42.1Unspecified behavior:D49.7 |
| meniscus, knee joint (lateral) (medial) | Malignant, secondary:C79.51Uncertain behavior:D48.0Unspecified behavior:D49.2 |
| mesentery, mesenteric | Malignant, primary:C48.1Malignant, secondary:C78.6Benign:D20.1Uncertain behavior:D48.4Unspecified behavior:D49.0 |
| mesoappendix | Malignant, primary:C48.1Malignant, secondary:C78.6Benign:D20.1Uncertain behavior:D48.4Unspecified behavior:D49.0 |
| mesocolon | Malignant, primary:C48.1Malignant, secondary:C78.6Benign:D20.1Uncertain behavior:D48.4Unspecified behavior:D49.0 |
| mesosalpinx | Malignant, primary:C57.1Malignant, secondary:C79.82Ca in situ:D07.39Benign:D28.2Uncertain behavior:D39.8Unspecified behavior:D49.59 |
| mesovarium | Malignant, primary:C57.1Malignant, secondary:C79.82Ca in situ:D07.39Benign:D28.2Uncertain behavior:D39.8Unspecified behavior:D49.59 |
| metacarpus (any bone) | Malignant, secondary:C79.51 |
| metastatic NEC | Malignant, secondary:C79.9 |
| metatarsus (any bone) | Malignant, secondary:C79.51 |
| midbrain | Malignant, primary:C71.7Malignant, secondary:C79.31Benign:D33.1Uncertain behavior:D43.1Unspecified behavior:D49.6 |
| mons, pubis | Malignant, primary:C51.9Malignant, secondary:C79.82Ca in situ:D07.1Benign:D28.0Uncertain behavior:D39.8Unspecified behavior:D49.59 |
| mons, veneris | Malignant, primary:C51.9Malignant, secondary:C79.82Ca in situ:D07.1Benign:D28.0Uncertain behavior:D39.8Unspecified behavior:D49.59 |
| motor tract | Malignant, primary:C72.9Malignant, secondary:C79.49Benign:D33.9Uncertain behavior:D43.9Unspecified behavior:D49.7 |
| motor tract, brain | Malignant, primary:C71.9Malignant, secondary:C79.31Benign:D33.2Uncertain behavior:D43.2Unspecified behavior:D49.6 |
| motor tract, cauda equina | Malignant, primary:C72.1Malignant, secondary:C79.49Benign:D33.4Uncertain behavior:D43.4Unspecified behavior:D49.7 |
| motor tract, spinal | Malignant, primary:C72.0Malignant, secondary:C79.49Benign:D33.4Uncertain behavior:D43.4Unspecified behavior:D49.7 |
| mouth | Malignant, primary:C06.9Malignant, secondary:C79.89Ca in situ:D00.00Benign:D10.30Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mouth, book-leaf | Malignant, primary:C06.89Malignant, secondary:C79.89 |
| mouth, floor | Malignant, primary:C04.9Malignant, secondary:C79.89Ca in situ:D00.06Benign:D10.2Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mouth, floor, anterior portion | Malignant, primary:C04.0Malignant, secondary:C79.89Ca in situ:D00.06Benign:D10.2Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mouth, floor, lateral portion | Malignant, primary:C04.1Malignant, secondary:C79.89Ca in situ:D00.06Benign:D10.2Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mouth, floor, overlapping lesion | Malignant, primary:C04.8 |
| mouth, overlapping NEC | Malignant, primary:C06.80 |
| mouth, roof | Malignant, primary:C05.9Malignant, secondary:C79.89Ca in situ:D00.00Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mouth, specified part NEC | Malignant, primary:C06.89Malignant, secondary:C79.89Ca in situ:D00.00Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mouth, vestibule | Malignant, primary:C06.1Malignant, secondary:C79.89Ca in situ:D00.00Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mucosa, alveolar (ridge or process) | Malignant, primary:C03.9Malignant, secondary:C79.89Ca in situ:D00.03Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mucosa, alveolar (ridge or process), lower | Malignant, primary:C03.1Malignant, secondary:C79.89Ca in situ:D00.03Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mucosa, alveolar (ridge or process), upper | Malignant, primary:C03.0Malignant, secondary:C79.89Ca in situ:D00.03Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mucosa, buccal | Malignant, primary:C06.0Malignant, secondary:C79.89Ca in situ:D00.02Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mucosa, cheek | Malignant, primary:C06.0Malignant, secondary:C79.89Ca in situ:D00.02Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| mucosa, nasal | Malignant, primary:C30.0Malignant, secondary:C78.39Ca in situ:D02.3Benign:D14.0Uncertain behavior:D38.5Unspecified behavior:D49.1 |
| mucosa, oral | Malignant, primary:C06.0Malignant, secondary:C79.89Ca in situ:D00.02Benign:D10.39Uncertain behavior:D37.09Unspecified behavior:D49.0 |
| Mullerian duct, female | Malignant, primary:C57.7Malignant, secondary:C79.82Ca in situ:D07.39Benign:D28.7Uncertain behavior:D39.8Unspecified behavior:D49.59 |
| Mullerian duct, male | Malignant, primary:C63.7Malignant, secondary:C79.82Ca in situ:D07.69Benign:D29.8Uncertain behavior:D40.8Unspecified behavior:D49.59 |
| muscle, extraocular | Malignant, secondary:C79.49Uncertain behavior:D48.7Unspecified behavior:D49.89 |
| myocardium | Malignant, primary:C38.0Malignant, secondary:C79.89Benign:D15.1Uncertain behavior:D48.7Unspecified behavior:D49.89 |
| myometrium | Malignant, primary:C54.2Malignant, secondary:C79.82Ca in situ:D07.0Benign:D26.1Uncertain behavior:D39.0Unspecified behavior:D49.59 |
| myopericardium | Malignant, primary:C38.0Malignant, secondary:C79.89Benign:D15.1Uncertain behavior:D48.7Unspecified behavior:D49.89 |
Read from: CMS/CDC ICD-10-CM release files (tabular list, order file, addenda) — FY2027. All data sources · How to read the labels
Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources