NPI registry status
Active
2026 NPPES data Anatomic Pathology & Clinical Pathology Physician NPI 1083668453 MD
Verify on CMS → Thomas Mezzetti, MD
Anatomic Pathology & Clinical Pathology 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 13,978 in Anatomic Pathology & Clinical Pathology 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.
What the federal data shows
Thomas Mezzetti, MD is an Anatomic Pathology & Clinical Pathology Physician in Hartford, Connecticut, listed in the federal CMS National Provider Identifier registry.
- Likely
- board-certified (heuristic)
- #67
- Anatomic Pathology & Clinical Pathology Physician rank among Connecticut specialties
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.
Federal trust snapshot
What official records show about Thomas Mezzetti, MD
Federal registry listing with board-eligibility signals — verify credentials with the state medical board before clinical decisions.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1083668453), first enumerated 05/20/2006.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1083668453 · Anatomic Pathology & Clinical Pathology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1083668453
- ENUM-LEGACY 2006
- TAX-MID 14K Anatomic Pathology
- RX-NONE No Part D
- BOOK-THIN 185 in Connecticut
- PHOTO-ENUM Anjali Satoskar · 2006
✓
Board certification likely (heuristic, not verified)
Thomas Mezzetti, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Thomas Mezzetti, MD?
Quality data not reportedPrimary specialty
Anatomic Pathology & Clinical Pathology Physician
Specialty distribution in Connecticut
How Anatomic Pathology & Clinical Pathology 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 Anatomic Pathology & Clinical Pathology 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).
Practice Address
Provider Details
| NPI | 1083668453 |
|---|---|
| Specialty | Anatomic Pathology & Clinical Pathology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 05/20/2006 |
Hospital and facility affiliations
Facilities where Thomas Mezzetti, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Hartford Pathology Associates PC
Hartford, CT
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
More Anatomic Pathology & Clinical Pathology Physician in CT →
All providers in Connecticut →
Compare specialties →
Anatomic Pathology & Clinical Pathology Physician Overview
How Thomas Mezzetti, MD fits within the Anatomic Pathology & Clinical Pathology Physician landscape nationally.
13,978
Anatomic Pathology & Clinical Pathology Physician Providers in US
55
States with Anatomic Pathology & Clinical Pathology Physician
399
Avg Claims per Provider
Nationwide Anatomic Pathology & Clinical Pathology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Mezzetti, both outside Connecticut so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Anatomic Pathology & Clinical Pathology Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Mezzetti.
One of 185 Anatomic Pathology & Clinical Pathology Physician providers enrolled in Connecticut, 5 are shown here.
Frequently Asked Questions
What is Thomas Mezzetti, MD's specialty? ▼
Thomas Mezzetti, MD specializes in Anatomic Pathology & Clinical Pathology Physician and practices in Hartford, Connecticut. Credentials: MD.
Where is Thomas Mezzetti, MD located? ▼
Thomas Mezzetti, MD is located at 80 SEYMOUR ST, Hartford, CT, 06115. Phone: (860) 545-2866.
What is Thomas Mezzetti, MD's NPI number? ▼
Thomas Mezzetti, MD's National Provider Identifier (NPI) is 1083668453, issued on 05/20/2006.
How many Anatomic Pathology & Clinical Pathology Physician providers are there in the US? ▼
There are 13,978 Anatomic Pathology & Clinical Pathology Physician providers across 55 states in the US. The average Anatomic Pathology & Clinical Pathology Physician provider writes 399 Medicare Part D claims per year.
Does Thomas Mezzetti, MD accept Medicare? ▼
Thomas Mezzetti, MD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thomas Mezzetti, MD's credentials? ▼
Thomas Mezzetti, MD's NPI is 1083668453 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.
- 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 August 2026 (NPPES) / 2024 (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
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 August 2026.