Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Nancy Lynn Flattem, M.D., M.S.

Ophthalmology Physician in Lone Tree, CO · enumerated 2007.

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

National Provider Identifier

1679603518

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Nancy Lynn Flattem

Credential M.D., M.S.

Sex Female

Practice address 10240 Park Meadows Dr, Lone Tree, CO, 80124

Phone (303) 338-4545

Enumeration date Mar 7, 2007

Last updated in NPPES Jun 17, 2021

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 44763 (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
75184206	Medicaid	CO	-
017401	Other	-	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

What specialty is Nancy Flattem?

Nancy Flattem is registered in NPPES with the primary taxonomy of Ophthalmology 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.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-17.