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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marshall Summar, MD

Clinical Genetics (M.D.) Physician in Chevy Chase, MD · enumerated 2006 · practices at Uncommon Cures.

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

National Provider Identifier

1336231745

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Registry record

Entity type Individual (Type 1)
Name Marshall Summar
Credential MD
Sex Male
Practice address 5550 Friendship Blvd Ste 580, Chevy Chase, MD, 20815
Phone (202) 379-8295
Enumeration date Sep 30, 2006
Last updated in NPPES Oct 18, 2023

Taxonomy & licenses

207SG0201X Clinical Genetics (M.D.) Physician Allopathic & Osteopathic Physicians · License MD20951 (TN) 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.

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Frequently asked questions

Is NPI 1336231745 active?
Yes, as of the latest NPPES snapshot, NPI 1336231745 is active (record last updated 2023-10-18).
How do I verify Marshall Summar's NPI record?
Cross-check NPI 1336231745 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-18.