ICD-10-CM 2027
ICD-10 code for bone hypertrophy
From the official ICD-10-CM alphabetic index entry “Hypertrophy, hypertrophic › bone”. Page updated September 29, 2026.
About coding bone hypertrophy
The ICD-10-CM code for bone hypertrophy is M89.30 (Hypertrophy of bone, unspecified site). The official index lists 22 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M89.30.
Within M89.3, choose M89.30 (unspecified site) only when documentation doesn't support a more specific option: shoulder (M89.31), humerus (M89.32), ulna and radius (M89.33), hand (M89.34), femur (M89.35), tibia and fibula (M89.36), ankle and foot (M89.37), other site (M89.38) 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 564 (Other Musculoskeletal System and Connective Tissue Diagnoses with MCC, relative weight 1.4908), DRG 565 (Other Musculoskeletal System and Connective Tissue Diagnoses with CC, relative weight 0.9783) and DRG 566 (Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC, relative weight 0.7378), 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.
More specific bone hypertrophy codes (official index)
- carpus M89.34 — Hypertrophy of bone, hand
- clavicle M89.31 — Hypertrophy of bone, shoulder
- femur M89.35 — Hypertrophy of bone, femur
- fibula M89.36 — Hypertrophy of bone, tibia and fibula
- finger M89.34 — Hypertrophy of bone, hand
- humerus M89.32 — Hypertrophy of bone, humerus
- ilium M89.38 — Hypertrophy of bone, other site
- ischium M89.38 — Hypertrophy of bone, other site
- metacarpus M89.34 — Hypertrophy of bone, hand
- metatarsus M89.37 — Hypertrophy of bone, ankle and foot
- multiple sites M89.39 — Hypertrophy of bone, multiple sites
- neck M89.38 — Hypertrophy of bone, other site
- pubic ramus [pubis] M89.38 — Hypertrophy of bone, other site
- radius M89.33 — Hypertrophy of bone, ulna and radius
- rib M89.38 — Hypertrophy of bone, other site
- scapula M89.31 — Hypertrophy of bone, shoulder
- skull M89.38 — Hypertrophy of bone, other site
- tarsus M89.37 — Hypertrophy of bone, ankle and foot
- tibia M89.36 — Hypertrophy of bone, tibia and fibula
- toe M89.37 — Hypertrophy of bone, ankle and foot
- ulna M89.33 — Hypertrophy of bone, ulna and radius
- vertebra M89.38 — Hypertrophy of bone, other site
Common questions about bone hypertrophy ICD-10 codes
What is the ICD-10 code for bone hypertrophy?
- M89.30 — Hypertrophy of bone, unspecified site. More specific codes apply when the documentation supports them: M89.34, M89.31, M89.35, M89.36 and others below.
What is the ICD-10 code for carpus bone hypertrophy?
- M89.34 — Hypertrophy of bone, hand (header code; choose a more specific subcode).
What is the ICD-10 code for clavicle bone hypertrophy?
- M89.31 — Hypertrophy of bone, shoulder (header code; choose a more specific subcode).
What is the ICD-10 code for femur bone hypertrophy?
- M89.35 — Hypertrophy of bone, femur (header code; choose a more specific subcode).
What is the ICD-10 code for fibula bone hypertrophy?
- M89.36 — Hypertrophy of bone, tibia and fibula (header code; choose a more specific subcode).
What is the ICD-10 code for finger bone hypertrophy?
- M89.34 — Hypertrophy of bone, hand (header code; choose a more specific subcode).
What is the ICD-10 code for humerus bone hypertrophy?
- M89.32 — Hypertrophy of bone, humerus (header code; choose a more specific subcode).
Is M89.30 billable?
- Yes. M89.30 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M89.30 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M89.30 as a principal diagnosis.
Is M89.30 a CC or MCC?
- No. M89.30 is neither a CC nor an MCC under MS-DRG v44.0.