Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ann T Klein, MD

Q: What is the NPI number for Ann Klein?

The National Provider Identifier (NPI) for Ann Klein is 1003861261, a Type 1 (individual) record in the CMS NPPES registry.

Family Medicine Physician in Greenwood Village, CO · enumerated 2006.

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

National Provider Identifier

1003861261

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Registry record

Entity type Individual (Type 1)

Name Dr. Ann T Klein

Credential MD

Sex Female

Practice address 7447 E Berry Ave, 250, Greenwood Village, CO, 80111

Phone (303) 770-4227

Fax (303) 770-4231

Enumeration date May 24, 2006

Last updated in NPPES Jul 1, 2015

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 39813 (CO) 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
82379033	Medicaid	CO	-
012932	Other	CO	KAISER COMMERCIAL NUMBER

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

Where does Ann Klein practice?

The practice location on file with NPPES is in Greenwood Village, CO. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Ann Klein?

The National Provider Identifier (NPI) for Ann Klein is 1003861261, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-07-01.