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

Diana Ana Cer, DO

Emergency Medicine Physician in Englewood, CO · enumerated 2009.

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

National Provider Identifier

1225261746

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Registry record

Entity type Individual (Type 1)

Name Diana Ana Cer

Credential DO

Sex Female

Practice address Englewood, CO, 80113

Phone (303) 953-5643

Enumeration date Sep 1, 2009

Last updated in NPPES Oct 23, 2022

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

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License C2-0011001 (DE) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License DR.0067916 (CO) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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

What specialty is Diana Cer?

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

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-23.