Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexander C Chester III, M.D.

Internal Medicine Physician in Washington, DC · enumerated 2006.

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

National Provider Identifier

1518989821

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexander C Chester III

Credential M.D.

Sex Male

Practice address 3301 New Mexico Ave Nw, Suite 348, Washington, DC, 20016

Phone (202) 362-4467

Fax (202) 362-2303

Enumeration date Jul 24, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD8990 (DC) 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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Alexander Chester?

Alexander Chester is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.