ICD-10 Code
Also called: Diagnosis Code, International Classification of Diseases
In plain English
A standardized code that describes your diagnosis or reason for the medical visit. ICD-10 codes start with a letter followed by numbers (like J06.9 for upper respiratory infection). These are different from CPT codes, which describe what was done.
Real-world example
You visit the doctor for a sore throat. The diagnosis code might be J02.9 (acute pharyngitis). This code gets paired with the CPT code for the office visit (99213) on your insurance claim.
Why this matters for your bill
Wrong diagnosis codes can cause insurance denials or make a covered service appear uncovered. If a claim is denied, check whether the ICD-10 code accurately reflects your condition — an incorrect code is a common and fixable error.
Confused by your bill?
Upload your bill and we'll explain every charge in plain English — no medical degree required.
Analyze My Bill — $10$10 one-time payment · No subscription · Money-back guarantee