Dr. Nancy Lynn Flattem , MD, MS
Ophthalmology β’ Lone Tree, CO
10240 Park Meadows Dr
Lone Tree, CO 801245425
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
NPI assigned on March 7, 2007; this date does not establish years in practice.
-
Published CMS data list 1,290 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
-
Published Part D records, 2024:
- Prednisolone Acetate β 248 prescription fills, including refills.
- Diclofenac Sodium β 199 prescription fills, including refills.
- Polymyxin B Sul-Trimethoprim (Polymyxin B Sulf/Trimethoprim) β 170 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 15 records in the table Β· Guide: How to read Medicare Part D prescriber data
-
More Part D prescriptions than 70% of clinicians listed under Ophthalmology in Colorado (2024, 215 clinicians with data). Median for this group: 725. Middle half: 244 to 1,409.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
-
Medicare Part D prescriptions went from 3,902 in 2020 to 1,290 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2020β2024.
Practice Location & Contact Primary Location
10240 Park Meadows Dr
Lone Tree, CO 801245425
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Colorado Permanente Medical Group Pc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Vanderbilt University School Of Medicine
2001
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
2,355 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$78,604 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019β2025.
Years since graduation
25 years (graduated 2001)
CMS Doctors and Clinicians data list 2001 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2007
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Flattem has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Flattem as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Lone Tree and Colorado
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 70% of clinicians listed under Ophthalmology in Colorado (2024, 215 clinicians with data). Median for this group: 725. Middle half: 244 to 1,409.
Too few clinicians listed under Ophthalmology in Lone Tree have Medicare Part D data for 2024 to compare.
Part D drug cost
Close to the middle for clinicians listed under Ophthalmology in Colorado (2024, 215 clinicians with data). Median for this group: $54,562. Middle half: $8,899 to $125,833.
Too few clinicians listed under Ophthalmology in Lone Tree have Medicare Part D data for 2024 to compare.
14 active clinicians are listed under Ophthalmology with a practice address in Lone Tree, CO (338 in Colorado).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Lone Tree
0% of these 14 clinicians have the CMS telehealth indicator.
85.7% of these 14 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Medicare Part D prescriptions
Medicare Part D prescriptions decreased 67% from 3,902 in 2020 to 1,290 in 2024.
- 2020: 3,902
- 2021: 1,648
- 2022: 2,508
- 2023: 1,587
- 2024: 1,290
-
30-day fills
30-day fills decreased 74% from 8,997 in 2020 to 2,355 in 2024.
- 2020: 8,997
- 2021: 4,076
- 2022: 5,199
- 2023: 3,927
- 2024: 2,355
-
Part D drug cost
Part D drug cost decreased 80% from $394,360 in 2020 to $78,604 in 2024.
- 2020: $394,360
- 2021: $181,418
- 2022: $213,430
- 2023: $157,886
- 2024: $78,604
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Prednisolone Acetate | Prednisolone Acetate | 248 | 9,508 | $12,653.62 | 127 |
| Diclofenac Sodium | Diclofenac Sodium | 199 | 3,630 | $2,584.80 | 111 |
| Polymyxin B Sul-Trimethoprim | Polymyxin B Sulf/Trimethoprim | 170 | 4,758 | $2,242.46 | 89 |
| Latanoprost | Latanoprost | 158 | 13,203 | $2,270.09 | 96 |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 120 | 10,550 | $3,044.07 | 67 |
| Brimonidine Tartrate | Brimonidine Tartrate | 117 | 9,843 | $2,104.66 | 64 |
| Rhopressa | Netarsudil Mesylate | 80 | 3,070 | $37,689.72 | 31 |
| Timolol Maleate | Timolol Maleate | 51 | 4,020 | $660.89 | 29 |
| Erythromycin | Erythromycin Base | 45 | 431 | $619.41 | 22 |
| Dorzolamide Hcl | Dorzolamide Hcl | 29 | 2,386 | $632.27 | 19 |
| Vyzulta | Latanoprostene Bunod | 22 | 1,060 | $10,699.60 | 11 |
| Tafluprost | Tafluprost/Pf | 15 | 540 | $2,445.60 | β |
| Moxifloxacin | Moxifloxacin Hcl | 13 | 184 | $127.48 | β |
| Bimatoprost | Bimatoprost | 12 | 925 | $674.54 | β |
| Ofloxacin | Ofloxacin | 11 | 128 | $154.77 | β |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2021-06-17NUCC Taxonomy Code: 207W00000X
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPHTHALMOLOGY
I20070913000599
CO
8921034729
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Colorado Permanente Medical Group Pc
10350 E Dakota Ave, Denver, CO 802471314
Phone: 3033384545
Colorado Permanente Medical Group Pc
10350 E Dakota Avenue B, Denver, CO 802471314
Phone: 3033384545
Colorado Permanente Medical Group Pc
5555 E Arapahoe Rd, Centennial, CO 801222312
Phone: 3033384545
Colorado Permanente Medical Group Pc
10240 Park Meadows Dr, Lone Tree, CO 801245425
Phone: 3033384545
Colorado Permanente Medical Group Pc
10350 E Dakota Avenue C, Denver, CO 802471314
Phone: 3033384545
Colorado Permanente Medical Group Pc
10350 E Dakota Ave, Denver, CO 802471314
Colorado Permanente Medical Group Pc
10400 E Alameda Ave, Denver, CO 802475104
Phone: 3033384545
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Radiology - Diagnostic Radiology
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Family Nurse Practitioner
Internal Medicine - Hospice and Palliative Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Nurse Practitioner
Physician Assistant - Medical
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 10350 E DAKOTA AVE, DENVER, CO 802471314
Registered at 10240 PARK MEADOWS DR, LONE TREE, CO 801245425 (Tel: 3033384545)
Registered at 2500 S HAVANA ST, AURORA, CO 800141618 (Tel: 3033384545)
NPI status registered as active in NPPES database
Registered at 280 EXEMPLA CIR, LAFAYETTE, CO 800263370 (Tel: 3033384545)
Registered at 280 EXEMPLA CIR, LAFAYETTE, CO 800263370 (Tel: 3033384545)
Recorded as NANCY FLATTEM, M.D., M.S.
Ophthalmology (license number reported to NPPES: CO 44763)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Ophthalmology Specialists in Lone Tree
- Dr. Richard Stiverson, MD
- Dr. Noah Simon, MD
- Dr. Jasleen Singh, MD
- Dr. Rachel Patel, MD
- Dr. Duy Vu, MD
- Dr. Erin Godbout, MD
Mailing Address
10350 E Dakota Ave
Denver, CO 802471314