Is ICD-10-CM code M12 billable?

No, M12 (Other and unspecified arthropathy) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code M12 belong to?

M12 belongs to Chapter 13 of the ICD-10-CM tabular list: M00–M99 (Diseases of the Musculoskeletal System and Connective Tissue).

M12

Non-Billable

ChapterM00–M99

Rankcategory

Description

Other and unspecified arthropathy

About ICD-10-CM code M12

M12 is the ICD-10-CM diagnosis code for Other and unspecified arthropathy. It sits in M00-M99 Diseases of the Musculoskeletal System and Connective Tissue, within Inflammatory polyarthropathies (M05-M14). M12 is not billable on its own, coders must choose one of its more specific child codes instead.

Use a more specific code (1 billable, 7 non-billable)

M12.0Chronic postrheumatic arthropathy [Jaccoud]has subcodes M12.1Kaschin-Beck diseasehas subcodes M12.2Villonodular synovitis (pigmented)has subcodes M12.3Palindromic rheumatismhas subcodes M12.4Intermittent hydrarthrosishas subcodes M12.5Traumatic arthropathyhas subcodes M12.8Other specific arthropathies, not elsewhere classifiedhas subcodes M12.9Arthropathy, unspecified

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

CH13 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

arthropathic psoriasis (L40.5-)
certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
compartment syndrome (traumatic) (T79.A-)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Instructional Notes

Excludes1(Not coded here. Use a different code.)

arthrosis (M15-M19)
cricoarytenoid arthropathy (J38.7)

Clinical Hierarchy

BillableHas subcodes

CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)

M05-M14Inflammatory polyarthropathies (M05-M14)

M12Other and unspecified arthropathyNot billable

M12.0Chronic postrheumatic arthropathy [Jaccoud]Subcodes

M12.1Kaschin-Beck diseaseSubcodes

M12.2Villonodular synovitis (pigmented)Subcodes

M12.3Palindromic rheumatismSubcodes

M12.4Intermittent hydrarthrosisSubcodes

M12.5Traumatic arthropathySubcodes

M12.8Other specific arthropathies, not elsewhere classifiedSubcodes

M12.9Arthropathy, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M12:

chapterCH13

Diseases of the musculoskeletal system and connective tissue (M00-M99)

View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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