Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Gregory Sean Hadfield, PA-C
Physician Assistant in Lakeport, CA · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1285869966
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Registry record
Entity type Individual (Type 1)
Name Mr. Gregory Sean Hadfield
Credential PA-C
Sex Male
Practice address 5144 Hill Rd E, Lakeport, CA, 95453
Phone (707) 263-8955
Fax (707) 263-8340
Enumeration date May 24, 2009
Last updated in NPPES May 24, 2009
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License P-16311 (CA) Primary
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What is the NPI number for Gregory Hadfield?
The National Provider Identifier (NPI) for Gregory Hadfield is 1285869966, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gregory Hadfield practice?
The practice location on file with NPPES is in Lakeport, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Christine Goold Physician Assistant · Lakeport, CA NPI 1184679300 James Kahn Dermatology Physician · Lakeport, CA NPI 1316030224 Diana Riley Physician Assistant · Lakeport, CA NPI 1730386046 Lake Dermatology Medical Assoc Inc Dermatology Physician · Lakeport, CA NPI 1437346657 Megan Furniss Dermatology Physician · Lakeport, CA NPI 1528359577 Integrated Dermatology of Lakeport, PC Dermatology Physician · Lakeport, CA NPI 1295276962
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-05-24.