Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Diane Sim, M.D.

Anesthesiology Physician in Washington, DC · enumerated 2006.

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

National Provider Identifier

1295821841

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Registry record

Entity type Individual (Type 1)

Name Diane Sim

Credential M.D.

Sex Female

Practice address 1145 - 19th Street, Nw, Suite 850, Washington, DC, 20036

Phone (202) 223-9040

Fax (202) 223-9047

Enumeration date Oct 4, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License MD13082 (DC) 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
5552-0005	Other	DC	CAREFIRST BCBS

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 1295821841 active?

Yes, as of the latest NPPES snapshot, NPI 1295821841 is active (record last updated 2007-07-08).

How do I verify Diane Sim's NPI record?

Cross-check NPI 1295821841 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 2007-07-08.