NPI registry status
Active
2026 NPPES data Geriatric Medicine (Family Medicine) Physician NPI 1942209937 M.D.
Verify on CMS → Shirley Frantz, M.D.
Geriatric Medicine (Family Medicine) Physician in Aurora, Colorado.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,779 in Geriatric Medicine (Family Medicine) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
385
Medicare Part D claims · 27 beneficiaries · Geriatric Medicine (Family Medicine) Physician avg: 5K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Shirley Frantz, M.D. filed 385 Medicare Part D claims in 2023 as a Geriatric Medicine (Family Medicine) Physician in Aurora, Colorado, prescribing 86% generic.
- 385
- Part D claims, 2023
- 86%
- generic prescribing
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Shirley Frantz, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
385 Top 43% higher than 57% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Shirley Frantz, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Shirley Frantz, M.D.?
Quality data not reportedPrimary specialty
Geriatric Medicine (Family Medicine) Physician
Medicare Part D claims
385 92% vs specialty avg
Specialty distribution in Colorado
How Geriatric Medicine (Family Medicine) Physician compares to other specialties among Colorado providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Geriatric Medicine (Family Medicine) Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Shirley Frantz, M.D. appears in the CMS NPPES registry as a Geriatric Medicine (Family Medicine) Physician provider holding M.D. credentials at 12250 E ILIFF AVE, Aurora, CO, 80014, with a listed phone of (303) 306-4321. NPI 1942209937 was issued on 07/20/2005.
Medicare Part D records for calendar year 2023 show 385 prescription claims written by this provider, covering 27 Medicare beneficiaries and totaling roughly $21K in drug spend, split 14% brand-name and 86% generic by claim count.
Geriatric Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 1,779 enrolled providers across 52 states and an average of 4,854 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1942209937 |
|---|---|
| Specialty | Geriatric Medicine (Family Medicine) Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 07/20/2005 |
Brand vs generic prescribing mix · Typical
Shirley Frantz, M.D. - brand share 14.0%
Geriatric Medicine (Family Medicine) Physician average
14% brand-name claims vs 86% generic, on 385 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
385
Total Claims
$21K
Total Drug Cost
27
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 386
- Total Day Supply
- 9,103
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $17K
- Generic Drug Cost
- $5K
Patient Demographics
- Average Patient Age
- 75.1 years
- Avg HCC Risk Score
- 2.53
- Gender Split
- 44% female / 56% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Shirley Frantz, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
63 claims
- Amlodipine Besylate 24
Amlodipine Besylate
24 claims
- Xarelto 17
Xarelto
17 claims
- Lisinopril 15
Lisinopril
15 claims
- Diclofenac Sodium 14
Diclofenac Sodium
14 claims
- Finasteride 13
Finasteride
13 claims
- Levothyroxine Sodium 13
Levothyroxine Sodium
13 claims
- Lithium Carbonate 13
Lithium Carbonate
13 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 63 |
| Amlodipine Besylate | 24 |
| Xarelto Rivaroxaban | 17 |
| Lisinopril | 15 |
| Diclofenac Sodium | 14 |
| Finasteride | 13 |
| Levothyroxine Sodium | 13 |
| Lithium Carbonate | 13 |
| Breo Ellipta Fluticasone/Vilanterol | 12 |
| Cilostazol | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Family Medicine) Physician in CO →
All providers in Colorado →
Compare specialties →
Geriatric Medicine (Family Medicine) Physician Overview
How Shirley Frantz, M.D. fits within the Geriatric Medicine (Family Medicine) Physician landscape nationally.
1,779
Geriatric Medicine (Family Medicine) Physician Providers in US
52
States with Geriatric Medicine (Family Medicine) Physician
4,854
Avg Claims per Provider
Shirley Frantz, M.D.'s 385 claims are below the specialty average of 4,854.
Nearby Geriatric Medicine (Family Medicine) Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Frantz.
Dr. Roger Bermingham
M. D.
Fort Collins, CO
Dr. Jeannae Dergance
MD
Aurora, CO
Dr. Julie Devita-Bailey
D.O.
Westminster, CO
Dr. Megan Gause
DO
Fort Collins, CO
Dr. Anne Giesen
DO
Boulder, CO
Compare Geriatric Medicine (Family Medicine) Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Colorado medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Geriatric Medicine (Family Medicine) Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Shirley Frantz, M.D.'s specialty? ▼
Shirley Frantz, M.D. specializes in Geriatric Medicine (Family Medicine) Physician and practices in Aurora, Colorado. Credentials: M.D..
How much does Shirley Frantz, M.D. prescribe under Medicare Part D? ▼
In 2023, Shirley Frantz, M.D. wrote 385 Medicare Part D claims totaling $21K in drug costs for 27 beneficiaries.
Where is Shirley Frantz, M.D. located? ▼
Shirley Frantz, M.D. is located at 12250 E ILIFF AVE, Aurora, CO, 80014. Phone: (303) 306-4321.
What is Shirley Frantz, M.D.'s NPI number? ▼
Shirley Frantz, M.D.'s National Provider Identifier (NPI) is 1942209937, issued on 07/20/2005.
Does Shirley Frantz, M.D. prescribe more brand-name or generic drugs? ▼
Shirley Frantz, M.D.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $17K in brand drug costs.
How many Geriatric Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 1,779 Geriatric Medicine (Family Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Family Medicine) Physician provider writes 4,854 Medicare Part D claims per year.
What drugs does Shirley Frantz, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Shirley Frantz, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Xarelto. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Shirley Frantz, M.D. accept Medicare? ▼
Shirley Frantz, M.D. appears in CMS Medicare data with 385 Part D claims and 27 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Shirley Frantz, M.D.'s credentials? ▼
Shirley Frantz, M.D.'s NPI is 1942209937 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.