Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William King Chapman Jr., PA
Specialist in Stockton, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1659345254
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Registry record
Entity type Individual (Type 1)
Name William King Chapman Jr.
Credential PA
Sex Male
Practice address 4628 Georgetown Pl, Stockton, CA, 95207
Phone (209) 478-6177
Fax (209) 478-6219
Enumeration date Feb 13, 2006
Last updated in NPPES Mar 21, 2016
Taxonomy & licenses
PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program.
About the PA credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| PA 11701 | Other | CA | PA LICENSE NUMBER |
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 specialty is William Chapman?
William Chapman is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Gregory Bensch Specialist · Stockton, CA NPI 1710950589 George Bensch Specialist · Stockton, CA NPI 1508839457 Allergy Immunology and Asthma Medical Group Inc. Specialist · Stockton, CA NPI 1376554824 Michael Balduzzi Allergy & Immunology Physician · Stockton, CA NPI 1346565934 Jeffrey Balduzzi Allergy Physician · Stockton, CA NPI 1235405952 Allergy Immunology and Asthma Medical Group Inc. Non-Pharmacy Dispensing Site · Stockton, CA NPI 1962369348
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-03-21.