M14.861 Arthropathies in other specified diseases classified elsewhere, right knee

Billable ICD-10-CM code, FY2026.

Applies from M14 Arthropathies in other diseases classified elsewhere

Excludes1 (never code together)

• arthropathy in:
• diabetes mellitus (E08-E13 with .61-)
• hematological disorders (M36.2-M36.3)
• hypersensitivity reactions (M36.4)
• neoplastic disease (M36.1)
• neurosyphillis (A52.16)
• sarcoidosis (D86.86)
• enteropathic arthropathies (M07.-)
• juvenile psoriatic arthropathy (L40.54)
• lipoid dermatoarthritis (E78.81)

Applies from M14.8 Arthropathies in other specified diseases classified elsewhere

Code first

• underlying disease, such as:
• amyloidosis (E85.-)
• erythema multiforme (L51.-)
• erythema nodosum (L52)
• hemochromatosis (E83.11-)
• hyperparathyroidism (E21.-)
• hypothyroidism (E00-E03)
• sickle-cell disorders (D57.-)
• thyrotoxicosis [hyperthyroidism] (E05.-)
• Whipple's disease (K90.81)

MS-DRG index

Defines the logic of DRG(s) 553-554 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 713.8 Arthropathy associated with other conditions classifiable elsewhere (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.

Code annotations containing back-references to M14.861

Back-references to M14.8

• Use Additional: L51 Erythema multiforme ("arthropathy associated with dermatological disorders (M14.8-)")
• Type 1 Excludes: M08 Juvenile arthritis ("arthropathy in Whipple's disease (M14.8)")

Back-references to M14

• Type 2 Excludes: M36 Systemic disorders of connective tissue in diseases classified elsewhere ("arthropathies in diseases classified elsewhere (M14.-)")

Nearby codes

• M14.85 Arthropathies in other specified diseases classified elsewhere, hip
• M14.851 Arthropathies in other specified diseases classified elsewhere, right hip
• M14.852 Arthropathies in other specified diseases classified elsewhere, left hip
• M14.859 Arthropathies in other specified diseases classified elsewhere, unspecified hip
• M14.86 Arthropathies in other specified diseases classified elsewhere, knee
• M14.861 Arthropathies in other specified diseases classified elsewhere, right knee (this code)
• M14.862 Arthropathies in other specified diseases classified elsewhere, left knee
• M14.869 Arthropathies in other specified diseases classified elsewhere, unspecified knee
• M14.87 Arthropathies in other specified diseases classified elsewhere, ankle and foot
• M14.871 Arthropathies in other specified diseases classified elsewhere, right ankle and foot
• M14.872 Arthropathies in other specified diseases classified elsewhere, left ankle and foot