NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1629036868 MD
Verify on CMS → Brian Peck, MD
Rheumatology Physician in Waterbury, 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 6,200 in Rheumatology 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
211
Medicare Part D claims · 83 beneficiaries · Rheumatology Physician avg: 2K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Brian Peck, MD filed 211 Medicare Part D claims in 2023 as a Rheumatology Physician in Waterbury, Connecticut.
- 211
- Part D claims, 2023
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.
Brian Peck, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
211 49th percentile higher than 49% 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)
Brian Peck, MD 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 Brian Peck, MD?
Quality data not reportedPrimary specialty
Rheumatology Physician
Medicare Part D claims
211 90% vs specialty avg
Specialty distribution in Connecticut
How Rheumatology Physician compares to other specialties among Connecticut 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 Rheumatology 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).
Brian Peck, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 1389 W MAIN ST, Waterbury, CT, 06708, with a listed phone of (203) 755-5555. NPI 1629036868 was issued on 05/03/2006.
Medicare Part D records for calendar year 2023 show 211 prescription claims written by this provider, covering 83 Medicare beneficiaries and totaling roughly $191K in drug spend.
Rheumatology Physician is a mid-sized specialty nationwide, with 6,200 enrolled providers across 52 states and an average of 2,054 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 | 1629036868 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 05/03/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
211
Total Claims
$191K
Total Drug Cost
83
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 495
- Total Day Supply
- 14,698
- Generic Drug Cost
- $10K
Patient Demographics
- Average Patient Age
- 70.6 years
- Avg HCC Risk Score
- 1.65
- Gender Split
- 77% female / 23% male
- Age Distribution
- <65: 22, 65-74: 32, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Brian Peck, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
30 claims
- Prednisone
Prednisone
25 claims
- Gabapentin
Gabapentin
15 claims
- Methotrexate
Methotrexate
12 claims
| Drug | Claims |
|---|---|
| Hydroxychloroquine Sulfate | 30 |
| Prednisone | 25 |
| Gabapentin | 15 |
| Methotrexate Methotrexate Sodium | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Brian Peck, MD fits within the Rheumatology Physician landscape nationally.
6,200
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider
Brian Peck, MD's 211 claims are below the specialty average of 2,054.
Nearby Rheumatology Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Peck.
Dr. Crispin Abarientos
M.D.
Middletown, CT
Dr. Aryeh Abeles
M.D.
Meriden, CT
Dr. Micha Abeles
M.D.
Meriden, CT
Dr. Jackilyn Annelli
PA
Norwich, CT
Dr. Sandra Apenteng
MD
Glastonbury, CT
Compare Rheumatology 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 Rheumatology 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 Connecticut
Frequently Asked Questions
What is Brian Peck, MD's specialty? ▼
Brian Peck, MD specializes in Rheumatology Physician and practices in Waterbury, Connecticut. Credentials: MD.
How much does Brian Peck, MD prescribe under Medicare Part D? ▼
In 2023, Brian Peck, MD wrote 211 Medicare Part D claims totaling $191K in drug costs for 83 beneficiaries.
Where is Brian Peck, MD located? ▼
Brian Peck, MD is located at 1389 W MAIN ST, Waterbury, CT, 06708. Phone: (203) 755-5555.
What is Brian Peck, MD's NPI number? ▼
Brian Peck, MD's National Provider Identifier (NPI) is 1629036868, issued on 05/03/2006.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,200 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does Brian Peck, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Brian Peck, MD's most frequently prescribed drugs include Hydroxychloroquine Sulfate, Prednisone, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Brian Peck, MD accept Medicare? ▼
Brian Peck, MD appears in CMS Medicare data with 211 Part D claims and 83 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Brian Peck, MD's credentials? ▼
Brian Peck, MD's NPI is 1629036868 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.
- 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.