NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1750325650 MD
Verify on CMS → Stanley Kerstein, MD
Internal Medicine Physician in Denver, 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 172,858 in Internal 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
1K
Medicare Part D claims · 282 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 17 pts above national avg 83.1 · Exceptional
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
Stanley Kerstein, MD reported a CMS MIPS final score of 100/100 - above the 83.1 national average - and filed 1,253 Medicare Part D claims in 2023.
- 100/100
- MIPS score · +17 vs avg
- 1K
- Part D claims, 2023
- 88%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Stanley Kerstein, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
100 Top 7% higher than 93% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Stanley Kerstein, MD sits
This provider among internal medicine physician peers
Across the 36,260 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Stanley Kerstein, MD writes more Part D claims than 59% of them and scores higher on MIPS quality than 93% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Stanley Kerstein, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Stanley Kerstein, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Stanley Kerstein, MD?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
1,253 54% vs specialty avg
MIPS final score
100/100 16.9 pts vs avg
Specialty distribution in Colorado
How Internal Medicine Physician compares to other specialties among Colorado providers
Medicare quality performance, MIPS
Stanley Kerstein, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 100/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 100/100 vs national avg 83.1
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).
Stanley Kerstein, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 4545 E 9TH AVE, Denver, CO, 80220, with a listed phone of (303) 320-2929. NPI 1750325650 was issued on 06/15/2006.
Medicare Part D records for calendar year 2023 show 1,253 prescription claims written by this provider, covering 282 Medicare beneficiaries and totaling roughly $150K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 1.2%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 100/100 for the 2023 performance year, compared with the national average of 83.1.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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 | 1750325650 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/15/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
100
Final Score
Avg: 83.1
100
Promoting Interoperability
Reporting: Group practice
Brand vs generic prescribing mix · Typical
Stanley Kerstein, MD - brand share 12.0%
Internal Medicine Physician average
12% brand-name claims vs 88% generic, on 1,253 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.
1,253
Total Claims
$150K
Total Drug Cost
282
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,194
- Total Day Supply
- 95,446
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $119K
- Generic Drug Cost
- $30K
- Opioid Claims
- 15 (1.2% rate)
Patient Demographics
- Average Patient Age
- 76.0 years
- Avg HCC Risk Score
- 1.08
- Gender Split
- 46% female / 54% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Stanley Kerstein, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
105 claims
- Amlodipine Besylate
Amlodipine Besylate
74 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
70 claims
- Levothyroxine Sodium
Levothyroxine Sodium
55 claims
- Metformin Hcl
Metformin Hcl
50 claims
- Lisinopril
Lisinopril
42 claims
- Valsartan
Valsartan
42 claims
- Simvastatin 35
Simvastatin
35 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 105 |
| Amlodipine Besylate | 74 |
| Rosuvastatin Calcium | 70 |
| Levothyroxine Sodium | 55 |
| Metformin Hcl | 50 |
| Lisinopril | 42 |
| Valsartan | 42 |
| Simvastatin | 35 |
| Pravastatin Sodium | 34 |
| Hydrochlorothiazide | 32 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Stanley Kerstein, MD fits within the Internal Medicine Physician landscape nationally.
172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Stanley Kerstein, MD's 1,253 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Kerstein.
Dr. Emily Aaron
MD
Denver, CO
Dr. Cynthia Abacan
MD
Pueblo, CO
Dr. David Abbey
MS MD
Fort Collins, CO
Dr. Ahmed Abdulrahman
MD
Pueblo, CO
Dr. Victor Abela
D.O.
Denver, CO
Compare Internal 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 Internal 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Colorado
Frequently Asked Questions
What is Stanley Kerstein, MD's specialty? ▼
Stanley Kerstein, MD specializes in Internal Medicine Physician and practices in Denver, Colorado. Credentials: MD.
How much does Stanley Kerstein, MD prescribe under Medicare Part D? ▼
In 2023, Stanley Kerstein, MD wrote 1,253 Medicare Part D claims totaling $150K in drug costs for 282 beneficiaries.
What is Stanley Kerstein, MD's Medicare quality score? ▼
Stanley Kerstein, MD has a CMS MIPS Final Score of 100/100. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Stanley Kerstein, MD located? ▼
Stanley Kerstein, MD is located at 4545 E 9TH AVE, Denver, CO, 80220. Phone: (303) 320-2929.
What is Stanley Kerstein, MD's NPI number? ▼
Stanley Kerstein, MD's National Provider Identifier (NPI) is 1750325650, issued on 06/15/2006.
Does Stanley Kerstein, MD prescribe more brand-name or generic drugs? ▼
Stanley Kerstein, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $119K in brand drug costs.
Does Stanley Kerstein, MD prescribe opioids? ▼
Yes, Stanley Kerstein, MD had 15 opioid claims in 2023 with an opioid prescribing rate of 1.2%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Stanley Kerstein, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Stanley Kerstein, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Rosuvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stanley Kerstein, MD accept Medicare? ▼
Stanley Kerstein, MD appears in CMS Medicare data with 1,253 Part D claims and 282 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stanley Kerstein, MD's credentials? ▼
Stanley Kerstein, MD's NPI is 1750325650 with credentials MD. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.