NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1962582718 MD
Verify on CMS → Gregory Bombassei, MD
Endocrinology, Diabetes & Metabolism Physician in Avon, 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 7,852 in Endocrinology, Diabetes & Metabolism 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
7K
Medicare Part D claims · 672 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
48%
generic claims · 44% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
91.8/100
▲ 9 pts above national avg 83.1 · Exceptional
Industry payments
$246.51
13 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
Gregory Bombassei, MD reported a CMS MIPS final score of 91.8/100 - above the 83.1 national average - and filed 6,656 Medicare Part D claims in 2023.
- 91.8/100
- MIPS score · +9 vs avg
- 7K
- Part D claims, 2023
- 48%
- 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.
Gregory Bombassei, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
92 Top 37% higher than 63% 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 Gregory Bombassei, MD sits
This provider among endocrinology, diabetes & metabolism physician peers
Across the 2,521 endocrinology, diabetes & metabolism physician providers who report both Medicare Part D prescribing and a MIPS quality score, Gregory Bombassei, MD writes more Part D claims than 89% of them and scores higher on MIPS quality than 69% - 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 endocrinology, diabetes & metabolism physician peer from a representative sample of 60; the gold marker is Gregory Bombassei, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Gregory Bombassei, 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 Gregory Bombassei, MD?
High performer (top quartile)Primary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
6,656 152% vs specialty avg
MIPS final score
91.8/100 8.7 pts vs avg
Specialty distribution in Connecticut
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among Connecticut providers
Medicare quality performance, MIPS
Gregory Bombassei, MD's 2023 MIPS final score plotted against the Endocrinology, Diabetes & Metabolism Physician national average
- MIPS Final Score
- 91.8/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Endocrinology, Diabetes & Metabolism Physician) - 91.8/100 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).
Gregory Bombassei, MD appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding MD credentials at 44 DALE RD STE 201, Avon, CT, 06001, with a listed phone of (860) 679-0234. NPI 1962582718 was issued on 10/16/2006.
Medicare Part D records for calendar year 2023 show 6,656 prescription claims written by this provider, covering 672 Medicare beneficiaries and totaling roughly $3.9 million in drug spend, split 44% brand-name and 48% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.8/100 for the 2023 performance year (Quality 99.4, Cost 73.6), compared with the national average of 83.1.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,852 enrolled providers across 54 states and an average of 2,639 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 | 1962582718 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/16/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
91.8469
Final Score
Avg: 83.1
99.4341
Quality
73.5775
Cost
Reporting: Individual
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 Gregory Bombassei, MD. Source: openpaymentsdata.cms.gov.
Total received
$247
Largest payer
Novo Nordisk 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 · Above average
Gregory Bombassei, MD - brand share 44.0%
Endocrinology, Diabetes & Metabolism Physician average
44% brand-name claims vs 48% generic, on 6,656 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.
6,656
Total Claims
$3.9M
Total Drug Cost
672
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 17,368
- Total Day Supply
- 517,939
- Brand vs Generic
- 44% brand / 48% generic
- Brand Drug Cost
- $3.7M
- Generic Drug Cost
- $88K
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 74.4 years
- Avg HCC Risk Score
- 1.30
- Gender Split
- 62% female / 38% male
- Age Distribution
- <65: 22, 65-74: 348, 75-84: 228, 85+: 74
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gregory Bombassei, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
723 claims
- Jardiance
Jardiance
394 claims
- Metformin Hcl
Metformin Hcl
384 claims
- Trulicity
Trulicity
382 claims
- Synthroid 270
Synthroid
270 claims
- Glimepiride 260
Glimepiride
260 claims
- Metformin Hcl Er 186
Metformin Hcl Er
186 claims
- Humalog Kwikpen U-… 167
Humalog Kwikpen U-100
167 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 723 |
| Jardiance Empagliflozin | 394 |
| Metformin Hcl | 384 |
| Trulicity Dulaglutide | 382 |
| Synthroid Levothyroxine Sodium | 270 |
| Glimepiride | 260 |
| Metformin Hcl Er Metformin Hcl | 186 |
| Humalog Kwikpen U-100 Insulin Lispro | 167 |
| Atorvastatin Calcium | 149 |
| Alendronate Sodium | 142 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in CT →
All providers in Connecticut →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Gregory Bombassei, MD fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,852
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Gregory Bombassei, MD's 6,656 claims are above the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Bombassei.
Dr. Fadi Al-Khayer
MD
Storrs, CT
Dr. Vivek Alaigh
MD
Stamford, CT
Dr. Kenda Alkwatli
MD
Wethersfield, CT
Dr. Ipek Alpertunga
MD
Hartford, CT
Dr. Helen Anaedo
M.D
Plainville, CT
Compare Endocrinology, Diabetes & Metabolism 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 Endocrinology, Diabetes & Metabolism 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 Gregory Bombassei, MD's specialty? ▼
Gregory Bombassei, MD specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Avon, Connecticut. Credentials: MD.
How much does Gregory Bombassei, MD prescribe under Medicare Part D? ▼
In 2023, Gregory Bombassei, MD wrote 6,656 Medicare Part D claims totaling $3.9M in drug costs for 672 beneficiaries.
What is Gregory Bombassei, MD's Medicare quality score? ▼
Gregory Bombassei, MD has a CMS MIPS Final Score of 91.8/100 (Quality: 99.4, Cost: 73.6). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Gregory Bombassei, MD located? ▼
Gregory Bombassei, MD is located at 44 DALE RD STE 201, Avon, CT, 06001. Phone: (860) 679-0234.
What is Gregory Bombassei, MD's NPI number? ▼
Gregory Bombassei, MD's National Provider Identifier (NPI) is 1962582718, issued on 10/16/2006.
Does Gregory Bombassei, MD prescribe more brand-name or generic drugs? ▼
Gregory Bombassei, MD's prescribing is 44% brand-name and 48% generic drugs by claim count, with $3.7M in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,852 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Gregory Bombassei, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Gregory Bombassei, MD's most frequently prescribed drugs include Levothyroxine Sodium, Jardiance, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Bombassei, MD accept Medicare? ▼
Gregory Bombassei, MD appears in CMS Medicare data with 6,656 Part D claims and 672 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Bombassei, MD's credentials? ▼
Gregory Bombassei, MD's NPI is 1962582718 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.