Free Doctor Search & NPI Lookup Tool
Instantly query 5.8M+ licensed US physicians, medical specialists, and healthcare organizations directly from the official CMS NPPES registry. Verify active licensing, taxonomy codes, and practice addresses.
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CMS NPPES provides public license and address data. eHealthcareLists appends 95% deliverable direct professional email addresses, cell phones, and IDN health system affiliations.
Understanding the CMS NPPES NPI Registry
Everything B2B healthcare marketers and compliance teams need to know about provider identifiers.
What is an NPI?
The National Provider Identifier is a permanent 10-digit intelligence key created by the Health Insurance Portability and Accountability Act (HIPAA) to identify individual doctors and medical entities across all electronic billing and administrative filings.
Type 1 vs Type 2 Identifiers
NPI-1: Individual practitioners (Physicians, Nurse Practitioners, Dentists, Therapists).
NPI-2: Healthcare organizations and facility groups (Hospitals, Ambulatory Surgery Centers, Nursing Homes, Clinical Laboratories).
Healthcare Taxonomy Codes
Every NPI is associated with an 848-character 10-digit alphanumeric taxonomy code (e.g. 207RC0000X for Cardiovascular Disease) defining the practitioner’s certified sub-specialty, state licensing authority, and board certification level.