ICD-10 Codes vs NPPES
Same instrument, two spec sheets — measured, not claimed.
ICD-10 Codes vs NPPES: common questions
Which is more reliable, ICD-10 Codes or NPPES?
On our scheduled checks, NPPES leads on measured uptime — ICD-10 Codes at —% versus NPPES at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Do ICD-10 Codes and NPPES need an API key?
Neither needs a paid key — ICD-10 Codes is callable with no signup, and NPPES is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call ICD-10 Codes and NPPES from the browser?
Only ICD-10 Codes is browser-friendly — it returns CORS headers over HTTPS. NPPES needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are ICD-10 Codes and NPPES free for commercial use?
ICD-10 Codes has unclear commercial terms, and NPPES allows commercial use on its free tier. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.