M83.4 identifies aluminum bone disease, a form of adult osteomalacia caused by aluminum accumulation in bone tissue, typically seen in patients with chronic renal failure who have been exposed to aluminum-containing phosphate binders or aluminum-contaminated dialysate.
Verified May 8, 2026 · 5 sources ↓
- Status
- Billable
- Chapter
- 13
- Related CPT
- 5
- Region
- General
Documentation tips
What should appear in the chart to support M83.4.
Source · Editorial brief grounded in 5 cited references ↓
- Physician must explicitly document 'aluminum bone disease' or 'aluminum-related osteomalacia' — a general diagnosis of osteomalacia or renal osteodystrophy alone does not support M83.4.
- Record the source of aluminum exposure: aluminum-containing phosphate binders (drug name, duration), aluminum-contaminated dialysate, or other iatrogenic source.
- Document supporting diagnostic evidence: serum aluminum levels, bone biopsy showing aluminum deposits at the mineralization front, or DEXA findings consistent with osteomalacia.
- If the patient also has renal osteodystrophy without a separately documented aluminum-specific bone disease, query the provider before defaulting to M83.4 over N25.0.
- Note dialysis history (modality, duration, facility changes) if aluminum-contaminated dialysate is the suspected source — this supports medical necessity and audit defense.
Related CPT procedures
Procedure codes commonly billed with M83.4. Linking the right diagnosis to the right procedure is what establishes medical necessity.
Source · CMS LCDs · AAOS specialty guidance · claims-pattern analysis
Common coding pitfalls
The recurring mistakes coders make with M83.4 and adjacent codes.
Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓
- Coding M83.4 when the documented diagnosis is 'renal osteodystrophy' without aluminum attribution — N25.0 is the correct code in that scenario; M83 has an Excludes1 note for N25.0.
- Confusing M83.4 with other M83 subcategories: malabsorption-related osteomalacia belongs at M83.2 and malnutrition-related at M83.3 — the aluminum etiology must be explicitly documented for M83.4.
- Omitting an external cause or drug code when aluminum exposure is traceable to a specific pharmaceutical agent, which can weaken the clinical narrative and trigger payer queries.
- Appending a 7th-character extension — M83.4 does not use 7th characters; adding one will produce an invalid code.
Clinical context
Source · Editorial summary grounded in 5 cited references ↓
M83.4 sits within the Adult osteomalacia category (M83) under Osteopathies and Chondropathies (M80–M94). It is the appropriate code when the physician explicitly documents aluminum bone disease or aluminum-related osteomalacia as the diagnosis. The classic patient profile is a chronic kidney disease patient — historically one on long-term hemodialysis — who developed impaired bone mineralization secondary to aluminum accumulation, either from aluminum hydroxide phosphate binders or dialysate contamination.
Before assigning M83.4, confirm the diagnosis is not better captured by an exclusion at the M83 category level. M83 carries Excludes1 notes for renal osteodystrophy (N25.0), vitamin D-resistant osteomalacia (E83.31), and active rickets (E55.0). If the provider documents renal osteodystrophy without specifically attributing it to aluminum toxicity, N25.0 is the correct code — not M83.4. The aluminum etiology must be documented.
M83.4 has no laterality sub-codes and no 7th-character extensions. It is a standalone billable code. When an external cause contributed to aluminum exposure — for example, a specific pharmaceutical agent — consider appending an appropriate T-code for the substance. Per ICD-10-CM Chapter 13 guidelines, an external cause code may follow the musculoskeletal code to identify the cause of the condition.
Sibling codes
Other billable codes under M83 (laterality / anatomic variants).
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 5 cited references ↓
01What distinguishes M83.4 from N25.0 (renal osteodystrophy)?
02Does M83.4 require a 7th-character extension?
03Should I add an external cause code when coding M83.4?
04Can M83.4 be coded alongside a chronic kidney disease code?
05Is M83.4 valid for FY2026 dates of service?
06What clinical findings typically support M83.4 in the medical record?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
- 01CDC ICD-10-CM Tabular List 2026 (effective October 1, 2025)
- 02icd10data.comhttps://www.icd10data.com/ICD10CM/Codes/M00-M99/M80-M85/M83-/M83.4
- 03aapc.comhttps://www.aapc.com/codes/icd-10-codes/M83.4
- 04cms.govhttps://www.cms.gov/medicare/coding/icd10/downloads/icd10cm-guidelines-2015.pdf
- 05cms.govhttps://www.cms.gov/medicare/coordination-benefits-recovery/overview/icd-code-lists
Mira AI Scribe
The Mira AI Scribe captures serum aluminum levels, dialysis history (duration, modality, phosphate binder names and duration of use), bone biopsy results noting aluminum deposits, and any DEXA or imaging findings consistent with osteomalacia. Capturing these details prevents a vague osteomalacia note from being downcoded to an unspecified M83 code or miscoded as renal osteodystrophy (N25.0), either of which may trigger a payer query or audit.
See how Mira captures M83.4 documentation