NPI registry status
Active
2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1215556253 MD, MPH
Verify on CMS → Mary Thomas, MD, MPH
Geriatric Medicine (Internal Medicine) Physician in New Haven, 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 4,171 in Geriatric Medicine (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
410
Medicare Part D claims · 60 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
What the federal data shows
Mary Thomas, MD, MPH filed 410 Medicare Part D claims in 2023 as a Geriatric Medicine (Internal Medicine) Physician in New Haven, Connecticut.
- 410
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥62nd
- pct by Part D claim volume (lower-bound band)
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.
Mary Thomas, MD, MPH's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
410 ≥ 62nd percentile 62% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Mary Thomas, MD, MPH 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 Mary Thomas, MD, MPH?
Quality data not reportedPrimary specialty
Geriatric Medicine (Internal Medicine) Physician
Medicare Part D claims
410 91% vs specialty avg
Specialty distribution in Connecticut
How Geriatric Medicine (Internal Medicine) 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 Geriatric Medicine (Internal Medicine) 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).
Mary Thomas, MD, MPH appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding MD, MPH credentials at 20 YORK ST, New Haven, CT, 06510, with a listed phone of (203) 688-4242. NPI 1215556253 was issued on 04/09/2020.
Medicare Part D records for calendar year 2023 show 410 prescription claims written by this provider, covering 60 Medicare beneficiaries and totaling roughly $76K in drug spend.
Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,171 enrolled providers across 52 states and an average of 4,450 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 | 1215556253 |
|---|---|
| Specialty | Geriatric Medicine (Internal Medicine) Physician |
| Credentials | MD, MPH |
| Gender | Female |
| NPI Issued | 04/09/2020 |
Hospital and facility affiliations
Facilities where Mary Thomas, MD, MPH 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.
UT Regional One Physicians Inc
Memphis, TN
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
410
Total Claims
$76K
Total Drug Cost
60
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 878
- Total Day Supply
- 25,885
- Generic Drug Cost
- $8K
Patient Demographics
- Average Patient Age
- 69.9 years
- Avg HCC Risk Score
- 2.46
- Gender Split
- 72% female / 28% male
- Age Distribution
- <65: 18, 65-74: 23, 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 Mary Thomas, MD, MPH prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
36 claims
- Lisinopril
Lisinopril
25 claims
- Amlodipine Besylate
Amlodipine Besylate
22 claims
- Duloxetine Hcl
Duloxetine Hcl
21 claims
- Metformin Hcl Er
Metformin Hcl Er
21 claims
- Carvedilol
Carvedilol
18 claims
- Pantoprazole Sodium
Pantoprazole Sodium
15 claims
- Jardiance 14
Jardiance
14 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 36 |
| Lisinopril | 25 |
| Amlodipine Besylate | 22 |
| Duloxetine Hcl | 21 |
| Metformin Hcl Er Metformin Hcl | 21 |
| Carvedilol | 18 |
| Pantoprazole Sodium | 15 |
| Jardiance Empagliflozin | 14 |
| Hydrochlorothiazide | 12 |
| Ezetimibe | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Internal Medicine) Physician in CT →
All providers in Connecticut →
Compare specialties →
Geriatric Medicine (Internal Medicine) Physician Overview
How Mary Thomas, MD, MPH fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.
4,171
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider
Mary Thomas, MD, MPH's 410 claims are below the specialty average of 4,450.
Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Thomas.
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 Geriatric Medicine (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 Mary Thomas, MD, MPH's specialty? ▼
Mary Thomas, MD, MPH specializes in Geriatric Medicine (Internal Medicine) Physician and practices in New Haven, Connecticut. Credentials: MD, MPH.
How much does Mary Thomas, MD, MPH prescribe under Medicare Part D? ▼
In 2023, Mary Thomas, MD, MPH wrote 410 Medicare Part D claims totaling $76K in drug costs for 60 beneficiaries.
Where is Mary Thomas, MD, MPH located? ▼
Mary Thomas, MD, MPH is located at 20 YORK ST, New Haven, CT, 06510. Phone: (203) 688-4242.
What is Mary Thomas, MD, MPH's NPI number? ▼
Mary Thomas, MD, MPH's National Provider Identifier (NPI) is 1215556253, issued on 04/09/2020.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 4,171 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does Mary Thomas, MD, MPH prescribe most often? ▼
Based on 2023 Medicare Part D data, Mary Thomas, MD, MPH's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mary Thomas, MD, MPH accept Medicare? ▼
Mary Thomas, MD, MPH appears in CMS Medicare data with 410 Part D claims and 60 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mary Thomas, MD, MPH's credentials? ▼
Mary Thomas, MD, MPH's NPI is 1215556253 with credentials MD, MPH. 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
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.