Is ICD-10-CM code M89.421 billable?

Yes, M89.421 (Other hypertrophic osteoarthropathy, right upper arm) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2026.

What chapter does ICD-10-CM code M89.421 belong to?

M89.421 belongs to Chapter 13 of the ICD-10-CM tabular list: M00–M99 — Diseases of the Musculoskeletal System and Connective Tissue.

M89.421

Billable

ChapterM00–M99

Ranksubcategory

Description

Other hypertrophic osteoarthropathy, right upper arm

Metadata & Insights

•Billable/specific code (valid for reimbursement).
•Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

General instructions are available for the parent sections:

View CH13 Notes View M86-M90 Notes View M89.4 Notes

Clinical Hierarchy

BillableHas subcodes

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

M86-M90Other osteopathies (M86-M90)

M89Other disorders of bone

M89.4Other hypertrophic osteoarthropathy

M89.42Other hypertrophic osteoarthropathy, upper arm

M89.421Other hypertrophic osteoarthropathy, right upper armBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M89.421:

subcategoryM89.4

Other hypertrophic osteoarthropathy

View context instructions

blockM86-M90

Other osteopathies (M86-M90)

View context instructions

chapterCH13

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

View context instructions

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 553

Bone Diseases and Arthropathies with MCC

DRG 554

Bone Diseases and Arthropathies without MCC

Cross Reference

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