NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1649382839 M.D.
Verify on CMS → Jonathan Dixon, M.D.
Rheumatology Physician in Hartford, 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
19
Medicare Part D claims · Rheumatology Physician avg: 2K
MIPS score
86.4/100
▲ 3 pts above national avg 83.1 · Above neutral
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Jonathan Dixon, M.D. reported a CMS MIPS final score of 86.4/100 - above the 83.1 national average - and filed 19 Medicare Part D claims in 2023.
- 86.4/100
- MIPS score · +3 vs avg
- 19
- Part D claims, 2023
- 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.
Jonathan Dixon, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
86 Top 48% higher than 52% 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 Jonathan Dixon, M.D. sits
This provider among rheumatology physician peers
Across the 2,181 rheumatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Jonathan Dixon, M.D. writes more Part D claims than 0% of them and scores higher on MIPS quality than 56% - placing this provider in the lower-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 rheumatology physician peer from a representative sample of 60; the gold marker is Jonathan Dixon, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Jonathan Dixon, M.D. 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 Jonathan Dixon, M.D.?
High performer (top quartile)Primary specialty
Rheumatology Physician
Medicare Part D claims
19 99% vs specialty avg
MIPS final score
86.4/100 3.3 pts vs avg
Specialty distribution in Connecticut
How Rheumatology Physician compares to other specialties among Connecticut providers
Medicare quality performance, MIPS
Jonathan Dixon, M.D.'s 2023 MIPS final score plotted against the Rheumatology Physician national average
- MIPS Final Score
- 86.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Rheumatology Physician) - 86.4/100 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).
Jonathan Dixon, M.D. appears in the CMS NPPES registry as a Rheumatology Physician provider holding M.D. credentials at 80 SEYMOUR STREET, Hartford, CT, 06102, with a listed phone of (860) 545-3667. NPI 1649382839 was issued on 08/31/2006.
Medicare Part D records for calendar year 2023 show 19 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $75K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 86.4/100 for the 2023 performance year (Quality 82, Cost 43), compared with the national average of 83.1.
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 | 1649382839 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/31/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
86.4127
Final Score
Avg: 83.1
81.9936
Quality
43.0396
Cost
100
Promoting Interoperability
Reporting: Group practice
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
19
Total Claims
$75K
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 24
- Total Day Supply
- 726
Patient Demographics
- Average Patient Age
- 54.3 years
- Avg HCC Risk Score
- 1.87
Rheumatology Physician Overview
How Jonathan Dixon, M.D. 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
Jonathan Dixon, M.D.'s 19 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 Dixon.
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.
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Frequently Asked Questions
What is Jonathan Dixon, M.D.'s specialty? ▼
Jonathan Dixon, M.D. specializes in Rheumatology Physician and practices in Hartford, Connecticut. Credentials: M.D..
How much does Jonathan Dixon, M.D. prescribe under Medicare Part D? ▼
In 2023, Jonathan Dixon, M.D. wrote 19 Medicare Part D claims totaling $75K in drug costs for N/A beneficiaries.
What is Jonathan Dixon, M.D.'s Medicare quality score? ▼
Jonathan Dixon, M.D. has a CMS MIPS Final Score of 86.4/100 (Quality: 82, Cost: 43). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Jonathan Dixon, M.D. located? ▼
Jonathan Dixon, M.D. is located at 80 SEYMOUR STREET, Hartford, CT, 06102. Phone: (860) 545-3667.
What is Jonathan Dixon, M.D.'s NPI number? ▼
Jonathan Dixon, M.D.'s National Provider Identifier (NPI) is 1649382839, issued on 08/31/2006.
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.
Does Jonathan Dixon, M.D. accept Medicare? ▼
Jonathan Dixon, M.D. appears in CMS Medicare data with 19 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jonathan Dixon, M.D.'s credentials? ▼
Jonathan Dixon, M.D.'s NPI is 1649382839 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.
- 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.