Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Walter Lamison, PA-C

Medical Physician Assistant in Dallastown, PA · enumerated 2006 · practices at Wellspan Medical Group.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1265461149

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Registry record

Entity type Individual (Type 1)

Name Mr. William Walter Lamison

Credential PA-C

Sex Male

Practice address 755 S Pleasant Ave, Dallastown, PA, 17313

Phone (717) 851-1300

Fax (717) 851-1310

Enumeration date Jul 2, 2006

Last updated in NPPES Apr 25, 2013

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License MA001592L (PA) Secondary

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License MA001592L (PA) Primary

363AS0400X Surgical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License MA001592L (PA) Secondary

Other identifiers

Identifier	Type	State	Issuer
03198601	Other	PA	CAPITAL BLUE CROSS-WMG
1551700	Other	PA	GATEWAY-WMG
104980	Other	PA	JOHNS HOPKINS
20019450	Other	PA	AMERIHEALTH MERCY-WMG

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.

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Frequently asked questions

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.

What specialty is William Lamison?

William Lamison is registered in NPPES with the primary taxonomy of Medical Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-04-25.