ICD-10-CM coding blog

The coding decisions a code lookup cannot make for you, worked through from the FY2027 Official Guidelines and the code set itself.

• ICD-10 changes October 2026: the FY2027 coder checklist

  FY2027 ICD-10-CM applies to services from October 1, 2026. The codes that stop being billable, what replaces them, and what to update before claims go out.

• Hypertension with CKD or heart failure: I11, I12 or I13?

  Hypertension with CKD is I12, with heart failure I11.0, with both I13. The link is presumed. Which code, which I50 and N18 add-ons, and in what order.

• Z86.73 vs I69: history of stroke with or without deficits

  No deficit left: Z86.73. Any residual deficit: code it from I69 instead, never both. How to pick the I69.3- code by deficit, side and dominance.

• How to code a hip fracture in ICD-10-CM, step by step

  A hip fracture code is four decisions: femoral site, displacement, side, then the S72 7th character. Plus the M80, M97 and aftercare exceptions.

• When to code a symptom instead of a diagnosis in ICD-10-CM

  Code the symptom until the provider confirms a related diagnosis: ICD-10-CM rules for symptoms with diagnoses, outpatient “rule out” and G89 pain codes.