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

Lester I Marion, MD

Gastroenterology Physician in Chevy Chase, MD · enumerated 2006.

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

National Provider Identifier

1336151711

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Registry record

Entity type Individual (Type 1)

Name Lester I Marion

Credential MD

Sex Male

Practice address Chevy Chase, MD, 20815

Phone (301) 656-3555

Fax (301) 986-8037

Enumeration date Aug 13, 2006

Last updated in NPPES Apr 28, 2016

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

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License MD9970 (DC) Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License D0020447 (MD) 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
021401100	Medicaid	DC	-
100005116	Other	DC	MEDICARE RAILROAD

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 Lester Marion practice?

The practice location on file with NPPES is in Chevy Chase, MD. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Lester Marion?

The National Provider Identifier (NPI) for Lester Marion is 1336151711, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Stanley Milobsky Endodontics · Chevy Chase, MD NPI 1073513115 Center for Plastic Surgery, PC Plastic Surgery Physician · Chevy Chase, MD NPI 1386631711 Lawrence Widerlite Gastroenterology Physician · Chevy Chase, MD NPI 1750350294 Michael Keegan Gastroenterology Physician · Chevy Chase, MD NPI 1992774442 Eduardo Gerlein Orthodontics and Dentofacial Orthopedics Dentistry · Chevy Chase, MD NPI 1952316549 Kathryn Kirk Gastroenterology Physician · Chevy Chase, MD NPI 1477655371 Kevin Collier Gastroenterology Physician · Chevy Chase, MD NPI 1730287228 Mary Craddock Anesthesiology Physician · Chevy Chase, MD NPI 1205922291

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-28.