Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Jon Gilchrist Walker, M.D.

Q: What is the NPI number for Jon Walker?

The National Provider Identifier (NPI) for Jon Walker is 1356748099, a Type 1 (individual) record in the CMS NPPES registry.

Urology Physician in Lancaster, PA · enumerated 2014.

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

National Provider Identifier

1356748099

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Registry record

Entity type Individual (Type 1)

Name Dr. Jon Gilchrist Walker

Credential M.D.

Sex Male

Practice address Lancaster, PA, 17602

Phone (717) 393-3555

Enumeration date Nov 24, 2014

Last updated in NPPES Nov 24, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License MD017170E (PA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Jon Walker practice?

The practice location on file with NPPES is in Lancaster, PA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Jon Walker?

The National Provider Identifier (NPI) for Jon Walker is 1356748099, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-11-24.