Nancy Flattem, M.D., M.S.
NPI 1679603518 · Ophthalmology Physician · Lone Tree, CO
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Flattem, M.D., M.S. is a Ophthalmology Physician provider in Lone Tree, CO (NPI 1679603518).
Provider details
- NPI number
- 1679603518
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., M.S.
- Sex
- Female
- Sole proprietor
- No
- License
- 44763 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 248 | 127 |
| Diclofenac Sodium | 199 | 111 |
| Polymyxin B Sulf/Trimethoprimbrand: Polymyxin B Sul-Trimethoprim | 170 | 89 |
| Latanoprost | 158 | 96 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 120 | 67 |
| Brimonidine Tartrate | 117 | 64 |
| Netarsudil Mesylatebrand: Rhopressa | 80 | 31 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-07
- Last updated
- 2021-06-17
- Certified
- 2021-06-17
Frequently asked questions
- What is Nancy Flattem's NPI number?
- Nancy Flattem's National Provider Identifier (NPI) is 1679603518, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Flattem's specialty?
- Nancy Flattem is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Flattem located?
- Nancy Flattem's practice location on file with NPPES is 10240 Park Meadows Dr, Lone Tree, CO 80124-5425.
- What is Nancy Flattem's phone number?
- The practice phone number listed in the NPPES registry for Nancy Flattem is (303) 338-4545.
- Does Nancy Flattem accept Medicare?
- Nancy Flattem is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Flattem's NPI active?
- Yes — Nancy Flattem's NPI (1679603518) is active in the NPPES registry as of the last update on 2021-06-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.