M83.8 Other adult osteomalacia

Billable ICD-10-CM code, FY2026.

Applies from M83 Adult osteomalacia

Excludes1 (never code together)

• infantile and juvenile osteomalacia (E55.0)
• renal osteodystrophy (N25.0)
• rickets (active) (E55.0)
• rickets (active) sequelae (E64.3)
• vitamin D-resistant osteomalacia (E83.31)
• vitamin D-resistant rickets (active) (E83.31)

Risk adjustment (HCC)

• RxHCC V08: HCC 87 — Osteoporosis, Vertebral and Pathological Fractures

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 268.2 Osteomalacia, unspecified (approximate)

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

• Adult diagnoses (age 15 through 124): Age conflict edit. These diagnoses are clinically expected only in patients age 15 through 124.

Code annotations containing back-references to M83.8

Back-references to M83

• Type 1 Excludes: E21 Hyperparathyroidism and other disorders of parathyroid gland ("adult osteomalacia (M83.-)")
• Type 1 Excludes: E55 Vitamin D deficiency ("adult osteomalacia (M83.-)")
• Type 1 Excludes: E83.3 Disorders of phosphorus metabolism and phosphatases ("adult osteomalacia (M83.-)")

Diagnosis Index entries for M83.8

• Craniotabes (cause unknown)
• Deficiency, deficient › calciferol › with › adult osteomalacia
• Deficiency, deficient › ergosterol › with › adult osteomalacia
• Deficiency, deficient › vitamin (multiple) NOS › D › with › adult osteomalacia
• Ergosterol deficiency (vitamin D) › with › adult osteomalacia
• Looser-Milkman (-Debray) syndrome
• Milkman's disease or syndrome
• Osteomalacia › adult › specified NEC
• Osteomalacia › pelvis
• Syndrome › osteoporosis-osteomalacia

Nearby codes

• M83.1 Senile osteomalacia
• M83.2 Adult osteomalacia due to malabsorption
• M83.3 Adult osteomalacia due to malnutrition
• M83.4 Aluminum bone disease
• M83.5 Other drug-induced osteomalacia in adults
• M83.8 Other adult osteomalacia (this code)
• M83.9 Adult osteomalacia, unspecified