NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1619071230 MD
Verify on CMS → Jeffrey Gelwan, MD
Internal Medicine Physician in Glastonbury, Connecticut.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 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 · 373 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
82%
generic claims · 18% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
85.1/100
▲ 2 pts above national avg 83.1 · Above neutral
Industry payments
$21.22
1 payments · CMS Open Payments (Sunshine Act)
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
Jeffrey Gelwan, MD reported a CMS MIPS final score of 85.1/100 - above the 83.1 national average - and filed 1,044 Medicare Part D claims in 2023.
- 85.1/100
- MIPS score · +2 vs avg
- 1K
- Part D claims, 2023
- 82%
- 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.
Jeffrey Gelwan, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
85 49th percentile higher than 49% 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 Jeffrey Gelwan, 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, Jeffrey Gelwan, MD writes more Part D claims than 56% of them and scores higher on MIPS quality than 47% - placing this provider in the high-volume, lower-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 Jeffrey Gelwan, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Jeffrey Gelwan, 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 Jeffrey Gelwan, MD?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
1,044 62% vs specialty avg
MIPS final score
85.1/100 2 pts vs avg
Specialty distribution in Connecticut
How Internal Medicine Physician compares to other specialties among Connecticut providers
Medicare quality performance, MIPS
Jeffrey Gelwan, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 85.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 85.1/100 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).
Jeffrey Gelwan, MD appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD credentials at 300 WESTERN BLVD, Glastonbury, CT, 06033, with a listed phone of (860) 657-1920. NPI 1619071230 was issued on 09/12/2006.
Medicare Part D records for calendar year 2023 show 1,044 prescription claims written by this provider, covering 373 Medicare beneficiaries and totaling roughly $192K in drug spend, split 18% brand-name and 82% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 85.1/100 for the 2023 performance year (Quality 89.7, Cost 68.3), compared with the national average of 83.1.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 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 | 1619071230 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/12/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
85.0713
Final Score
Avg: 83.1
89.7092
Quality
68.332
Cost
83
Promoting Interoperability
Reporting: Group practice
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Jeffrey Gelwan, MD. Source: openpaymentsdata.cms.gov.
Total received
$21
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Jeffrey Gelwan, MD - brand share 18.0%
Internal Medicine Physician average
18% brand-name claims vs 82% generic, on 1,044 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.
1,044
Total Claims
$192K
Total Drug Cost
373
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,453
- Total Day Supply
- 69,847
- Brand vs Generic
- 18% brand / 82% generic
- Brand Drug Cost
- $132K
- Generic Drug Cost
- $59K
- Antibiotic Claims
- 24
Patient Demographics
- Average Patient Age
- 73.7 years
- Avg HCC Risk Score
- 1.07
- Gender Split
- 65% female / 35% male
- Age Distribution
- <65: 16, 65-74: 204, 75-84: 122, 85+: 31
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Jeffrey Gelwan, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Pantoprazole Sodium
Pantoprazole Sodium
259 claims
- Omeprazole
Omeprazole
175 claims
- Famotidine 82
Famotidine
82 claims
- Sucralfate 71
Sucralfate
71 claims
- Rabeprazole Sodium 62
Rabeprazole Sodium
62 claims
- Sutab 54
Sutab
54 claims
- Lansoprazole 51
Lansoprazole
51 claims
- Esomeprazole Magne… 32
Esomeprazole Magnesium
32 claims
| Drug | Claims |
|---|---|
| Pantoprazole Sodium | 259 |
| Omeprazole | 175 |
| Famotidine | 82 |
| Sucralfate | 71 |
| Rabeprazole Sodium | 62 |
| Sutab Sod Sulf/Pot Chloride/Mag Sulf | 54 |
| Lansoprazole | 51 |
| Esomeprazole Magnesium | 32 |
| Dexilant Dexlansoprazole | 21 |
| Dexlansoprazole Dr Dexlansoprazole | 21 |
* 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 Jeffrey Gelwan, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Jeffrey Gelwan, MD's 1,044 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Gelwan.
Christina Abavana
Bridgeport, CT
Dr. Hoda Abdel Salam
M.D.
New Britain, CT
Dr. Gada Abdelhafiz
MD
New London, CT
Dr. Mahmoud Abdelrahman
MD
Bridgeport, CT
Dr. Safiyya Abdulkadir
MD
Norwalk, CT
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 Connecticut 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.
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Frequently Asked Questions
What is Jeffrey Gelwan, MD's specialty? ▼
Jeffrey Gelwan, MD specializes in Internal Medicine Physician and practices in Glastonbury, Connecticut. Credentials: MD.
How much does Jeffrey Gelwan, MD prescribe under Medicare Part D? ▼
In 2023, Jeffrey Gelwan, MD wrote 1,044 Medicare Part D claims totaling $192K in drug costs for 373 beneficiaries.
What is Jeffrey Gelwan, MD's Medicare quality score? ▼
Jeffrey Gelwan, MD has a CMS MIPS Final Score of 85.1/100 (Quality: 89.7, Cost: 68.3). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Jeffrey Gelwan, MD located? ▼
Jeffrey Gelwan, MD is located at 300 WESTERN BLVD, Glastonbury, CT, 06033. Phone: (860) 657-1920.
What is Jeffrey Gelwan, MD's NPI number? ▼
Jeffrey Gelwan, MD's National Provider Identifier (NPI) is 1619071230, issued on 09/12/2006.
Does Jeffrey Gelwan, MD prescribe more brand-name or generic drugs? ▼
Jeffrey Gelwan, MD's prescribing is 18% brand-name and 82% generic drugs by claim count, with $132K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 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 Jeffrey Gelwan, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Jeffrey Gelwan, MD's most frequently prescribed drugs include Pantoprazole Sodium, Omeprazole, Famotidine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jeffrey Gelwan, MD accept Medicare? ▼
Jeffrey Gelwan, MD appears in CMS Medicare data with 1,044 Part D claims and 373 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jeffrey Gelwan, MD's credentials? ▼
Jeffrey Gelwan, MD's NPI is 1619071230 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.