NPI Portal NPI Lookup & Verification

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

Dr. Leonard E Rosenfeld, DO

Internal Medicine Physician in Philadelphia, PA · enumerated 2006 · practices at Dr Leonard E Rosenfeld PC.

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

National Provider Identifier

1134142318

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Registry record

Entity type Individual (Type 1)
Name Dr. Leonard E Rosenfeld
Credential DO
Sex Male
Practice address Philadelphia, PA, 19146
Phone (215) 382-6112
Fax (215) 382-6115
Enumeration date Jul 26, 2006
Last updated in NPPES Dec 8, 2020

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 05001780L (PA) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 0S001780L (PA) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
0006901360002 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.

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Frequently asked questions

What is the NPI number for Leonard Rosenfeld?
The National Provider Identifier (NPI) for Leonard Rosenfeld is 1134142318, a Type 1 (individual) record in the CMS NPPES registry.
Where does Leonard Rosenfeld practice?
The practice location on file with NPPES is in Philadelphia, PA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-08.