ICD-10-CM 2027
ICD-10 code for Clubbed nail pachydermoperiostosis
From the official ICD-10-CM alphabetic index entry “Clubbed nail pachydermoperiostosis”. Page updated September 29, 2026.
About coding Clubbed nail pachydermoperiostosis
The ICD-10-CM code for Clubbed nail pachydermoperiostosis is M89.40 (Other hypertrophic osteoarthropathy, unspecified site).
Within M89.4, choose M89.40 (unspecified site) only when documentation doesn't support a more specific option: shoulder (M89.41), upper arm (M89.42), forearm (M89.43), hand (M89.44), thigh (M89.45), lower leg (M89.46), ankle and foot (M89.47), other site (M89.48) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 553 (Bone Diseases and Arthropathies with MCC, relative weight 1.2494) and DRG 554 (Bone Diseases and Arthropathies without MCC, relative weight 0.8331), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Clubbed nail pachydermoperiostosis ICD-10 codes
What is the ICD-10 code for Clubbed nail pachydermoperiostosis?
- M89.40 — Other hypertrophic osteoarthropathy, unspecified site.
Is M89.40 billable?
- Yes. M89.40 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M89.40 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M89.40 as a principal diagnosis.
Is M89.40 a CC or MCC?
- No. M89.40 is neither a CC nor an MCC under MS-DRG v44.0.