Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katherine L Nathanson, MD

Clinical Genetics (M.D.) Physician in Philadelphia, PA · enumerated 2006.

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

National Provider Identifier

1841226024

Verified

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Registry record

Entity type Individual (Type 1)

Name Katherine L Nathanson

Credential MD

Sex Male

Practice address 3400 Civic Center Blvd, 1st Floor, Suite 300 S, Philadelphia, PA, 19104

Phone (215) 662-4740

Fax (215) 614-0298

Enumeration date Jun 23, 2006

Last updated in NPPES Oct 29, 2018

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD059456L (PA) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD059456L (PA) Secondary

207SG0201X Clinical Genetics (M.D.) Physician Allopathic & Osteopathic Physicians · License MD059456L (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
0017645000001	Medicaid	PA	-
0092941	Medicaid	NJ	-

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 Katherine Nathanson?

The National Provider Identifier (NPI) for Katherine Nathanson is 1841226024, a Type 1 (individual) record in the CMS NPPES registry.

Where does Katherine Nathanson 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 2018-10-29.