Softening of bone in adults caused by insufficient dietary intake of nutrients essential for bone mineralization, most commonly calcium or vitamin D from food sources rather than malabsorption or metabolic disease.
Verified May 8, 2026 · 4 sources ↓
- Status
- Billable
- Chapter
- 13
- Related CPT
- 5
- Region
- General
Documentation tips
What should appear in the chart to support M83.3.
Source · Editorial brief grounded in 4 cited references ↓
- Record the specific nutritional deficiency driving the diagnosis (e.g., dietary calcium insufficiency, vitamin D deficiency from inadequate intake) — not just 'osteomalacia.'
- Document lab values supporting the diagnosis: serum 25-hydroxyvitamin D level, alkaline phosphatase, serum calcium, phosphorus, and PTH.
- Note imaging findings that confirm bone softening: Looser zones (pseudofractures), osteopenia, or insufficiency fractures on X-ray, DXA, or MRI.
- Distinguish dietary deficiency from malabsorption in the clinical note — a statement like 'due to inadequate dietary intake' versus 'due to malabsorption' determines M83.3 versus M83.2.
- Confirm patient age is 15 or older; M83.3 has an age-specific ICD-10-CM restriction and will not pass age-based edits for pediatric patients.
Related CPT procedures
Procedure codes commonly billed with M83.3. 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 M83.3 and adjacent codes.
Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓
- Using M83.3 when the etiology is malabsorption (e.g., celiac disease, short bowel syndrome) — that's M83.2, not M83.3.
- Coding M83.3 alongside E83.31 (vitamin D-resistant osteomalacia) — these are Excludes1 codes and cannot be used together; if FGF23-mediated or X-linked hypophosphatemia is confirmed, E83.31 controls.
- Applying M83.3 to patients under age 15 — pediatric osteomalacia maps to E55.0 (infantile and juvenile osteomalacia), not any M83 code.
- Defaulting to M83.9 (unspecified adult osteomalacia) when the chart clearly documents nutritional cause — specificity is available and should be used.
- Pairing M83.3 with amniotic/placental injection CPT codes without recognizing it is on the CMS non-covered-indication list for those procedures (CMS Article A59764).
Clinical context
Source · Editorial summary grounded in 4 cited references ↓
M83.3 applies to adult patients (ages 15–124) diagnosed with osteomalacia where the root cause is inadequate nutritional intake — not a malabsorption disorder, renal pathology, or genetic condition. The distinction from sibling codes is etiologic: M83.2 covers malabsorption-driven osteomalacia (e.g., post-bariatric, celiac-related), while M83.3 is reserved for cases where the patient's diet itself is deficient in calcium, phosphorus, or vitamin D. Typical presentations include diffuse bone pain, proximal muscle weakness, and pseudofractures (Looser zones) on imaging, with lab findings showing low 25-hydroxyvitamin D, elevated alkaline phosphatase, and low or normal serum calcium.
Several codes are explicitly excluded at the M83 parent level — never use M83.3 when the documented cause is vitamin D-resistant osteomalacia (E83.31), renal osteodystrophy (N25.0), or active rickets (E55.0). Those are Excludes1 entries, meaning they cannot be coded simultaneously with any M83 code. For pediatric patients, drop to E55.0 (infantile and juvenile osteomalacia); M83.3 is an adult-only code.
CMS has listed M83.3 among diagnoses that do NOT support medical necessity for amniotic/placental-derived product injections for musculoskeletal indications (LCD A59764). Flag this when considering advanced biological therapies — payers will deny those procedures when M83.3 is the driving diagnosis.
Sibling codes
Other billable codes under M83 (laterality / anatomic variants).
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 4 cited references ↓
01What is the difference between M83.2 and M83.3?
02Can M83.3 be used for a 12-year-old patient with dietary vitamin D deficiency?
03Can M83.3 and E83.31 be coded together?
04Does M83.3 require a 7th character?
05Will M83.3 support medical necessity for amniotic or placental-derived injection procedures?
06What labs should be documented to support M83.3?
07Is M83.3 appropriate when a patient has both poor diet and a malabsorption condition?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
- 01CDC ICD-10-CM Tabular List 2026 (effective Oct 1, 2025)
- 02icd10data.comhttps://www.icd10data.com/ICD10CM/Codes/M00-M99/M80-M85/M83-/M83.3
- 03cms.govhttps://www.cms.gov/medicare-coverage-database/view/article.aspx?articleid=59764&ver=7
- 04aapc.comhttps://www.aapc.com/codes/icd-10-codes/M83.3
Mira AI Scribe
Mira's AI scribe captures the nutritional history (dietary patterns, caloric restriction, food avoidance), lab values (25-OH vitamin D, ALP, calcium, phosphorus), and imaging findings (Looser zones, insufficiency fractures) from the encounter note — the combination that locks in M83.3 over M83.9 and prevents an audit flag for unspecified coding when etiology is documented.
See how Mira captures M83.3 documentation