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John Marcelis, MD

Geriatric Medicine (Internal Medicine) Physician in Warminster, PA · enumerated 2006.

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

National Provider Identifier

1285667105

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Registry record

Entity type Individual (Type 1)
Name John Marcelis
Credential MD
Sex Male
Practice address 10000 Anns Choice Way, Warminster, PA, 18974
Phone (215) 443-3850
Fax (215) 443-3963
Enumeration date Jul 7, 2006
Last updated in NPPES Feb 26, 2026

Taxonomy & licenses

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License NJDCATEMP-025750 (NJ) Secondary
207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License MD045170E (PA) Primary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD045170E (PA) Secondary
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
0409465 Other - EVERCARE
0417057000 Other PA KEYSTONE MCO
594706 Other - HIGHMARK BCBS
SE1562914 Other PA HIGHMARK BLE SHIELD

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

Where does John Marcelis practice?
The practice location on file with NPPES is in Warminster, PA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Marcelis?
The National Provider Identifier (NPI) for John Marcelis is 1285667105, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-26.