E83.39
BillableOther disorders of phosphorus metabolism
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is E83.39 an HCC code?
No. E83.39 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for E83.39
For E83.39to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically — it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed E83.39 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
E83.39 is the ICD-10-CM diagnosis code for other disorders of phosphorus metabolism. Problems with phosphorus metabolism that are not covered by other specific phosphorus disorder codes. E83.39 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering metabolic disorders (e70-e88).
E83.39 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
This code does NOT map to a CMS-HCC under V24 or V28 models. It maps only to RxHCC 43. No RAF score impact. If hereditary hypophosphatemia is the underlying condition, E83.31 should be used to capture V28 HCC 50 (RAF 0.289).
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for E83.39 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Ensure documentation specifies the nature of the phosphorus disorder before using this code
- •Review for more specific codes related to high or low phosphorus levels
Clinical Significance
This code captures specified phosphorus metabolism disorders that are not familial hypophosphatemia, such as tumor-induced osteomalacia, acquired hypophosphatemia, or hyperphosphatemia from non-renal causes. These conditions affect bone health and require targeted management.
Documentation Requirements
- ✓Specific phosphorus metabolism disorder identified by the provider
- ✓Etiology documented (tumor-induced, medication-related, malabsorption-related)
- ✓Serum phosphorus levels and related laboratory data
- ✓Clinical manifestations (bone pain, fractures, muscle weakness)
- ✓Treatment plan and monitoring schedule
Commonly Confused Codes
- •E83.31 — Familial hypophosphatemia: use for confirmed hereditary hypophosphatemia; has HCC mapping
- •E83.30 — Disorder of phosphorus metabolism, unspecified: less specific; use only when type is unknown
- •N25.0 — Renal osteodystrophy: phosphorus disorder secondary to chronic kidney disease
- •E21.3 — Hyperparathyroidism, unspecified: may cause phosphorus abnormalities but is a parathyroid disorder