NPI registry status
Active
2026 NPPES data Sleep Medicine (Internal Medicine) Physician NPI 1356314983 M.D.
Verify on CMS → Robert Thomas, M.D.
Sleep Medicine (Internal Medicine) Physician in Boston, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 932 in Sleep 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
549
Medicare Part D claims · 125 beneficiaries · Sleep Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
79%
generic claims · 21% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$9.6K
11 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Robert Thomas, M.D. filed 549 Medicare Part D claims in 2024 as a Sleep Medicine (Internal Medicine) Physician in Boston, Massachusetts, prescribing 79% generic.
- 549
- Part D claims, 2024
- 79%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥65th
- 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.
Federal trust snapshot
What official records show about Robert Thomas, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1356314983), first enumerated 02/13/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 549 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
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
- Reported
Industry payment transparency
$9.6K in reported industry payments (11 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Robert Thomas, M.D.'s individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- 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 1356314983 · Sleep Medicine (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1356314983
- ENUM-LEGACY 2006
- TAX-NARROW 932
- RX-LIGHT 549
- BOOK-THIN 17 in Massachusetts
- PHOTO-ENUM Mahmood Ali, M.D. · 2006
Robert Thomas, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
549 ≥ 65th percentile 65% of 1,416,883 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 · 2024
✓
Board certification likely (heuristic, not verified)
Robert Thomas, M.D. 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 Robert Thomas, M.D.?
Quality data not reportedPrimary specialty
Sleep Medicine (Internal Medicine) Physician
Medicare Part D claims
549 57% vs specialty avg
Specialty distribution in Massachusetts
How Sleep Medicine (Internal Medicine) Physician compares to other specialties among Massachusetts 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 Sleep 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).
Practice Address
Provider Details
| NPI | 1356314983 |
|---|---|
| Specialty | Sleep Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/13/2006 |
Hospital and facility affiliations
Facilities where Robert Thomas, M.D. 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.
Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr Inc
Boston, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Robert Thomas, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$9.6K
Largest payer
JAZZ PHARMACEUTICALS 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.
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Robert Thomas, M.D.. To verify Robert Thomas, M.D.'s current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Robert Thomas, M.D. - brand share 21.0%
Sleep Medicine (Internal Medicine) Physician average
21% brand-name claims vs 79% generic, on 549 2024 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 2024.
549
Total Claims
$1.1M
Total Drug Cost
125
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 834.3
- Total Day Supply
- 24,673
- Brand vs Generic
- 21% brand / 79% generic
- Brand Drug Cost
- $995K
- Generic Drug Cost
- $89K
- Opioid Claims
- 23 (4.2% rate)
Patient Demographics
- Average Patient Age
- 70.3 years
- Avg HCC Risk Score
- 1.55
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 25, 65-74: N/A, 75-84: 50, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Robert Thomas, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Acetazolamide
Acetazolamide
71 claims
- Gabapentin
Gabapentin
44 claims
- Modafinil
Modafinil
38 claims
- Zolpidem Tartrate
Zolpidem Tartrate
38 claims
- Xywav
Xywav
34 claims
- Dextroamphetamine-… 24
Dextroamphetamine-Amphetamine
24 claims
- Clonazepam 21
Clonazepam
21 claims
- Eszopiclone 15
Eszopiclone
15 claims
| Drug | Claims |
|---|---|
| Acetazolamide | 71 |
| Gabapentin | 44 |
| Modafinil | 38 |
| Zolpidem Tartrate | 38 |
| Xywav Sodium,calcium,mag,pot Oxybate | 34 |
| Dextroamphetamine-Amphetamine Dextroamphetamine/Amphetamine | 24 |
| Clonazepam | 21 |
| Eszopiclone | 15 |
| Dextroamphetamine-Amphet Er Dextroamphetamine/Amphetamine | 14 |
| Temazepam | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Sleep Medicine (Internal Medicine) Physician in MA →
All providers in Massachusetts →
Compare specialties →
Sleep Medicine (Internal Medicine) Physician Overview
How Robert Thomas, M.D. fits within the Sleep Medicine (Internal Medicine) Physician landscape nationally.
932
Sleep Medicine (Internal Medicine) Physician Providers in US
52
States with Sleep Medicine (Internal Medicine) Physician
1,288
Avg Claims per Provider
Robert Thomas, M.D.'s 549 claims are below the specialty average of 1,288.
Nationwide Sleep Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Thomas, both outside Massachusetts 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 Sleep Medicine (Internal Medicine) Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Thomas.
One of 17 Sleep Medicine (Internal Medicine) Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Essam Ansari
M.D.
Methuen, MA
Dr. Mushtaque Chachar
MD
New Bedford, MA
Dr. Susan Chang
MD
Boston, MA
Dr. Steven Davis
M.D.
Worcester, MA
Dr. Chloe Deng
D.O.
Auburn, MA
Compare Sleep Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Robert Thomas, M.D.'s specialty? ▼
Robert Thomas, M.D. specializes in Sleep Medicine (Internal Medicine) Physician and practices in Boston, Massachusetts. Credentials: M.D..
How much does Robert Thomas, M.D. prescribe under Medicare Part D? ▼
In 2024, Robert Thomas, M.D. wrote 549 Medicare Part D claims totaling $1.1M in drug costs for 125 beneficiaries.
Where is Robert Thomas, M.D. located? ▼
Robert Thomas, M.D. is located at 330 BROOKLINE AVE, Boston, MA, 02215. Phone: (617) 667-5864.
What is Robert Thomas, M.D.'s NPI number? ▼
Robert Thomas, M.D.'s National Provider Identifier (NPI) is 1356314983, issued on 02/13/2006.
Does Robert Thomas, M.D. prescribe more brand-name or generic drugs? ▼
Robert Thomas, M.D.'s prescribing is 21% brand-name and 79% generic drugs by claim count, with $995K in brand drug costs.
Does Robert Thomas, M.D. prescribe opioids? ▼
Yes, Robert Thomas, M.D. had 23 opioid claims in 2024 with an opioid prescribing rate of 4.2%.
How many Sleep Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 932 Sleep Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Sleep Medicine (Internal Medicine) Physician provider writes 1,288 Medicare Part D claims per year.
What drugs does Robert Thomas, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Robert Thomas, M.D.'s most frequently prescribed drugs include Acetazolamide, Gabapentin, Modafinil. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Robert Thomas, M.D. accept Medicare? ▼
Robert Thomas, M.D. appears in CMS Medicare data with 549 Part D claims and 125 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Thomas, M.D.'s credentials? ▼
Robert Thomas, M.D.'s NPI is 1356314983 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 (2024). 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 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.