Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Warren Oldham, M.D.

Ophthalmology Physician in West Chester, PA · enumerated 2009 · practices at Chester County Eye Care Assoc PC.

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

National Provider Identifier

1205065646

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Warren Oldham

Credential M.D.

Sex Male

Practice address 915 Old Fern Hill Rd Bldg B Ste 200, West Chester, PA, 19380

Phone (610) 696-1230

Fax (610) 696-2341

Enumeration date Jul 7, 2009

Last updated in NPPES Oct 10, 2020

Taxonomy & licenses

207WX0009X Glaucoma Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License MD450544 (PA) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License MD450544 (PA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
102929690	Medicaid	PA	-
P01374577	Other	PA	RAILROAD MEDICARE

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

How do I verify Gregory Oldham's NPI record?

Cross-check NPI 1205065646 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1205065646 active?

Yes, as of the latest NPPES snapshot, NPI 1205065646 is active (record last updated 2020-10-10).

Other providers at this practice address

Browse all →

Bruce Saran Ophthalmology Physician · West Chester, PA NPI 1689674020 Chester County Eye Care Assoc PC Ophthalmology Physician · West Chester, PA NPI 1588666200 Anne Marie Chu Optometrist · West Chester, PA NPI 1255323598 John Destafeno Ophthalmology Physician · West Chester, PA NPI 1912097171 Jill Mcadams Optometrist · West Chester, PA NPI 1780734970 Michael Ward Ophthalmology Physician · West Chester, PA NPI 1609919406 Cristan Arena Ophthalmology Physician · West Chester, PA NPI 1922277953

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-10.