Nancy Lynn Flattem, M.D., M.S.
Ophthalmology Physician · Lone Tree, CO
Nancy Lynn Flattem, M.D., M.S. is an ophthalmology physician with a practice address in Lone Tree, Colorado, and NPI 1679603518, issued on Mar 7, 2007. Check the license (Colorado 44763, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Nancy Lynn Flattem
- Credential
- M.D., M.S.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 44763 CO
Self-reported in NPPES; status is on the state search - Practice location
- 10240 Park Meadows Dr, Lone Tree, CO 80124
- Phone
- (303) 338-4545
- Enumerated
- Mar 7, 2007
- Record last updated
- Jun 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 75184206 CO
- Medicare enrollment
- Enrolled (PECOS I20070913000599); accepts Medicare assignment
- Medical or professional school
- Vanderbilt University School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 338 in Colorado → Look up another NPI →
Also registered at 10240 Park Meadows Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicole Adams, NPAcute Care Nurse Practitioner1770711749
- Angela Allen, AU.DAudiologist1649307653
- Sara Alley, AU.DAudiologist1720104342
- Scott Andersen, MDDiagnostic Radiology Physician1851376347
- Mei Ling Anderson, RNRegistered Nurse1043194558
- Bradley Andrews, MDOtolaryngology Physician1891822896
Verify Nancy Lynn Flattem in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 44763Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% fewer Medicare Part D claims than the average ophthalmology physician in 2024
1,358 Medicare Part D claims for 329 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.
Most prescribed
- Prednisolone Acetate248 claims
- Diclofenac Sodium199 claims
- Polymyxin B Sul-Trimethoprim170 claims
- Latanoprost158 claims
- Dorzolamide-Timolol120 claims
- Brimonidine Tartrate117 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Colorado Permanente Medical Group PCLone Tree, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nancy Lynn Flattem among 338 ophthalmology physician records in Colorado
Nancy Lynn Flattem, M.D., M.S. is one of 338 ophthalmology physician records with a practice address in Colorado. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 30% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2001 · median 2001 among the 199 with a school on file
- Record last updated2021 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Colorado
There are 338 ophthalmology physician records in Colorado.
All 338 in Colorado → Every provider in Lone Tree → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Erin Godbout, MDLone Tree, CO 801241972035004
- Nayasha Madhan, MDLone Tree, CO 801241861954737
- Gerald Meltzer, M.D.Lone Tree, CO 801241881768133
- Raymond Nagashima, MDLone Tree, CO 801241700920584
- Jennifer Pan, M.D.Lone Tree, CO 801241871999805
- Rachel Patel, M.D.Lone Tree, CO 801241578099073
- Samantha Roland, MDLone Tree, CO 801241780817411
- Noah Simon, MDLone Tree, CO 801241922636760
Common questions
What is Nancy Lynn Flattem, M.D., M.S.'s NPI number?
Nancy Lynn Flattem, M.D., M.S.'s National Provider Identifier (NPI) is 1679603518, issued on Mar 7, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Lynn Flattem, M.D., M.S. located?
The NPPES record lists a practice address at 10240 Park Meadows Dr, Lone Tree, CO, 80124. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.
How can I verify Nancy Lynn Flattem, M.D., M.S.'s license?
NPPES lists Colorado license number 44763, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nancy Lynn Flattem, M.D., M.S. prescribe under Medicare Part D?
In 2024, Nancy Lynn Flattem, M.D., M.S. had 1,358 Medicare Part D claims for 329 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.