Reference estimate. Always verify against official sources.
Two code sets do two different jobs on every claim. ICD-10 codes say what's wrong with the patient, the diagnosis, like E11.9 for type 2 diabetes. CPT codes say what was done, the service or procedure, like 99214 for an office visit. Payers want both on a claim: the diagnosis to justify the service, and the service to set the fee.
Typing into the box filters the same list you'd see under "Show all common codes" against three fields at once: the code itself, its plain-language description, and its category. Typing "shoulder" surfaces M25.511 through its description; typing "99213" or "office visit" both land on the same row from two different directions.
The categories behind the search come straight from the entries themselves, not a separate classification layer:
| ICD-10 category present in this tool | Example code |
|---|---|
| Endocrine & metabolic | E11.9, E78.5 |
| Circulatory system | I10, I25.10 |
| Respiratory system | J45.9, J06.9 |
| Musculoskeletal system | M54.5, M25.511 |
| Mental & behavioral | F32.9 |
| Genitourinary system | N39.0 |
This site also runs the billing, dosing, and staffing math you'd need next.
ICD-10 is the "why": a diagnosis code describing the condition being treated, like I10 for hypertension. CPT is the "what": a procedure code describing the service delivered, like an office visit or a lab test. A billed claim almost always pairs one of each.
No. This tool holds a curated set of roughly two dozen high-frequency codes meant for learning and quick reference, not the full official registries, which run into the tens of thousands of entries between ICD-10 and CPT combined.
They're illustrative reference amounts included so you can see roughly how procedures compare in cost, not numbers pulled from any specific payer's fee schedule. Actual allowed amounts vary by payer, contract, and region, sometimes by a wide margin.
Treat it as a study aid, not a claims tool. Before you submit or code a real claim, verify every code against the current official ICD-10 and CPT releases and the specific payer's billing rules, since both sets update on a yearly cycle.
