NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marcia M Nelson, MD

Internal Medicine Physician in Murrysville, PA · enumerated 2011 · practices at Allegheny Clinic.

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

National Provider Identifier

1043591597

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Marcia M Nelson
Credential MD
Sex Female
Practice address 4262 Old William Penn Hwy Ste 109, Murrysville, PA, 15668
Fax (724) 327-4690
Enumeration date Aug 29, 2011
Last updated in NPPES Oct 13, 2020

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD442925 (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
102632018 Medicaid PA -

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 Marcia Nelson practice?
The practice location on file with NPPES is in Murrysville, PA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marcia Nelson?
The National Provider Identifier (NPI) for Marcia Nelson is 1043591597, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

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