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R00-R9960 V28 risk-adjusting codes

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

ICD-10-CM Chapter 18 (R00-R99) in the FY2026 code set. 60 codes in this chapter map to a CMS-HCC V28 payment category, across 9 HCC categories.

CMS-HCC V28 categories in this chapter (9)

Open any category for its full member-code list, RAF, and hierarchy.

Risk-adjusting ICD-10-CM codes (60)

Codes in this chapter that map to a CMS-HCC V28 payment category. Open any code for its full detail.

Frequently asked questions

How many ICD-10-CM codes in Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified risk-adjust under CMS-HCC V28?

60 ICD-10-CM codes in the R00-R99 chapter (Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified) map to a CMS-HCC V28 payment category for payment year 2026.

Which CMS-HCC V28 categories do R00-R99 codes map to?

Codes in this chapter map to 9 distinct CMS-HCC V28 categories, most commonly HCC 202 (Coma, Brain Compression/Anoxic Damage), HCC 2 (Septicemia, Sepsis, Systemic Inflammatory Response Syndrome/Shock), HCC 201 (Seizure Disorders and Convulsions).

What ICD-10-CM chapter is R00-R99?

R00-R99 is ICD-10-CM Chapter 18, Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified, in the FY2026 code set.

Source: FY2026 ICD-10-CM Tabular (CDC/NCHS) and the CMS-HCC v28 PY2026 mapping file.