NPI Lookup is an online tool for searching and validating NPI numbers for US healthcare professionals and organizations. It uses AI (including GPT models) to refine queries and help interpret registry records.
Search the NPI registry
Look up records by NPI number, clinician name, or facility name (clinic or hospital) and get detailed profile data from the registry. The interface is designed for fast lookup and cross-checking, including comparing multiple records.
AI assistance for clearer results
AI suggestions help you phrase searches and understand what you’re seeing in an NPI record. You can ask follow-up questions about:
- Profile details and how the NPI entry is structured
- Provider types and related attributes
- Differences between similar records
NPI validation
The built-in NPI Validator checks an NPI number quickly by:
- Detecting format issues
- Matching the number against the registry
- Confirming whether the provider record exists
This helps reduce errors in documentation, claims, and medical records for teams such as pharmacists, clinic administrators, insurers, and researchers.

