R73.9 — Hyperglycemia, unspecified

R73.9

ICD-10 Chapter 18: Symptoms, Signs & Abnormal Findings — illustrative image — Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00–R99) — illustrative image

What this code means

Hyperglycaemia means raised blood glucose recorded as a finding, in a person not coded as having diabetes.

Also called: hyperglycemia, high blood sugar.

When this code is used

Used for hyperglycaemia, unspecified.

Where it sits in ICD-10-CM

Code R73.9 belongs to Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified, which covers codes R00–R99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

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Frequently asked questions

What is ICD-10-CM code R73.9?

R73.9 is the ICD-10-CM diagnosis code for “Hyperglycemia, unspecified”. Hyperglycaemia means raised blood glucose recorded as a finding, in a person not coded as having diabetes.

When is code R73.9 used?

Used for hyperglycaemia, unspecified. It belongs to Chapter 18 of ICD-10-CM (Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.