NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Roy G. Marcus, M.D.

Nephrology Physician in Upland, PA · enumerated 2006.

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

National Provider Identifier

1245278084

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Roy G. Marcus
Credential M.D.
Sex Male
Practice address 30 Medical Center Blvd, Suite 303, Upland, PA, 19013
Phone (610) 872-8501
Fax (610) 872-5188
Enumeration date Jun 3, 2006
Last updated in NPPES Jul 26, 2012

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License MD061386L (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

What is the NPI number for Roy Marcus?
The National Provider Identifier (NPI) for Roy Marcus is 1245278084, a Type 1 (individual) record in the CMS NPPES registry.
Where does Roy Marcus practice?
The practice location on file with NPPES is in Upland, PA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-26.