Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Charles John Billington Jr., MD

Clinical Genetics (M.D.) Physician in Washington, DC · enumerated 2014.

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

National Provider Identifier

1003235367

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Registry record

Entity type Individual (Type 1)

Name Dr. Charles John Billington Jr.

Credential MD

Sex Male

Practice address 111 Michigan Ave Nw, W3.5, 600, Washington, DC, 20010

Phone (202) 476-3670

Fax (202) 476-4741

Enumeration date Apr 15, 2014

Last updated in NPPES Feb 4, 2025

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 67510 (MN) Secondary

207SG0201X Clinical Genetics (M.D.) Physician Allopathic & Osteopathic Physicians · License 67510 (MN) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1003235367 active?

Yes, as of the latest NPPES snapshot, NPI 1003235367 is active (record last updated 2025-02-04).

How do I verify Charles Billington's NPI record?

Cross-check NPI 1003235367 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 2025-02-04.