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

Dr. Edwin Charles Chapman Sr., M.D.

Internal Medicine Physician in Washington, DC · enumerated 2006.

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

National Provider Identifier

1841303880

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Registry record

Entity type Individual (Type 1)

Name Dr. Edwin Charles Chapman Sr.

Credential M.D.

Sex Male

Practice address Washington, DC, 20002

Phone (202) 396-8550

Fax (202) 388-4461

Enumeration date Aug 16, 2006

Last updated in NPPES Nov 10, 2011

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 10544 (DC) Primary

207RA0401X Addiction Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 10544 (DC) Secondary

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
1841303880	Medicaid	DC	-

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

How do I verify Edwin Chapman's NPI record?

Cross-check NPI 1841303880 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1841303880 active?

Yes, as of the latest NPPES snapshot, NPI 1841303880 is active (record last updated 2011-11-10).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-10.