NPI registry status
Active
2026 NPPES data Colon & Rectal Surgery Physician NPI 1689892481 M.D., PH.D
Verify on CMS → Evangelos Messaris, M.D., PH.D
Colon & Rectal Surgery 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 1,608 in Colon & Rectal Surgery 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
198
Medicare Part D claims · 69 beneficiaries · Colon & Rectal Surgery Physician avg: 196
Generic prescribing
71%
generic claims · 29% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Evangelos Messaris, M.D., PH.D filed 198 Medicare Part D claims in 2023 as a Colon & Rectal Surgery Physician in Boston, Massachusetts, prescribing 71% generic.
- 198
- Part D claims, 2023
- 71%
- generic prescribing
- 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.
Evangelos Messaris, M.D., PH.D's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
198 35th percentile higher than 35% 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 certification likely (heuristic, not verified)
Evangelos Messaris, M.D., PH.D practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Evangelos Messaris, M.D., PH.D?
Quality data not reportedPrimary specialty
Colon & Rectal Surgery Physician
Medicare Part D claims
198 1% vs specialty avg
Specialty distribution in Massachusetts
How Colon & Rectal Surgery 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 Colon & Rectal Surgery 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).
Evangelos Messaris, M.D., PH.D appears in the CMS NPPES registry as a Colon & Rectal Surgery Physician provider holding M.D., PH.D credentials at 330 BROOKLINE AVE # 6, Boston, MA, 02215, with a listed phone of (617) 667-4159. NPI 1689892481 was issued on 04/24/2007.
Medicare Part D records for calendar year 2023 show 198 prescription claims written by this provider, covering 69 Medicare beneficiaries and totaling roughly $560K in drug spend, split 29% brand-name and 71% generic by claim count, with an opioid prescribing rate of 19.2%.
Colon & Rectal Surgery Physician is a narrow specialty nationwide, with 1,608 enrolled providers across 50 states and an average of 196 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 | 1689892481 |
|---|---|
| Specialty | Colon & Rectal Surgery Physician |
| Credentials | M.D., PH.D |
| Gender | Male |
| NPI Issued | 04/24/2007 |
Hospital and facility affiliations
Facilities where Evangelos Messaris, M.D., PH.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.
Atrius Health Inc
Boston, MA
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).
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 Evangelos Messaris, M.D., PH.D. To verify Evangelos Messaris, M.D., PH.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 · Above average
Evangelos Messaris, M.D., PH.D - brand share 29.0%
Colon & Rectal Surgery Physician average
29% brand-name claims vs 71% generic, on 198 2023 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 2023.
198
Total Claims
$560K
Total Drug Cost
69
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 210
- Total Day Supply
- 2,549
- Brand vs Generic
- 29% brand / 71% generic
- Brand Drug Cost
- $557K
- Generic Drug Cost
- $3K
- Opioid Claims
- 38 (19.2% rate)
- Antibiotic Claims
- 50
Patient Demographics
- Average Patient Age
- 69.4 years
- Avg HCC Risk Score
- 1.79
- Gender Split
- 59% female / 41% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Evangelos Messaris, M.D., PH.D prescribes most
Top Medicare Part D drugs by claim count, 2023
- Metronidazole
Metronidazole
30 claims
- Gabapentin
Gabapentin
24 claims
- Magnesium Sulfate
Magnesium Sulfate
18 claims
- Morphine Sulfate
Morphine Sulfate
17 claims
- Gattex
Gattex
12 claims
- Tramadol Hcl 11
Tramadol Hcl
11 claims
| Drug | Claims |
|---|---|
| Metronidazole | 30 |
| Gabapentin | 24 |
| Magnesium Sulfate | 18 |
| Morphine Sulfate | 17 |
| Gattex Teduglutide | 12 |
| Tramadol Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Colon & Rectal Surgery Physician in MA →
All providers in Massachusetts →
Compare specialties →
Colon & Rectal Surgery Physician Overview
How Evangelos Messaris, M.D., PH.D fits within the Colon & Rectal Surgery Physician landscape nationally.
1,608
Colon & Rectal Surgery Physician Providers in US
50
States with Colon & Rectal Surgery Physician
196
Avg Claims per Provider
Evangelos Messaris, M.D., PH.D's 198 claims are above the specialty average of 196.
Nearby Colon & Rectal Surgery Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Messaris.
Dr. Karim Alavi
MD
Worcester, MA
Dr. Olga Beresneva
M.D.
Boston, MA
Dr. Marcella Bradway
M.D.
Pittsfield, MA
Dr. Elizabeth Breen
MD
Burlington, MA
Dr. Amanda Cimsit
MD
Boston, MA
Compare Colon & Rectal Surgery 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 Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Colon & Rectal Surgery 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 Evangelos Messaris, M.D., PH.D's specialty? ▼
Evangelos Messaris, M.D., PH.D specializes in Colon & Rectal Surgery Physician and practices in Boston, Massachusetts. Credentials: M.D., PH.D.
How much does Evangelos Messaris, M.D., PH.D prescribe under Medicare Part D? ▼
In 2023, Evangelos Messaris, M.D., PH.D wrote 198 Medicare Part D claims totaling $560K in drug costs for 69 beneficiaries.
Where is Evangelos Messaris, M.D., PH.D located? ▼
Evangelos Messaris, M.D., PH.D is located at 330 BROOKLINE AVE # 6, Boston, MA, 02215. Phone: (617) 667-4159.
What is Evangelos Messaris, M.D., PH.D's NPI number? ▼
Evangelos Messaris, M.D., PH.D's National Provider Identifier (NPI) is 1689892481, issued on 04/24/2007.
Does Evangelos Messaris, M.D., PH.D prescribe more brand-name or generic drugs? ▼
Evangelos Messaris, M.D., PH.D's prescribing is 29% brand-name and 71% generic drugs by claim count, with $557K in brand drug costs.
Does Evangelos Messaris, M.D., PH.D prescribe opioids? ▼
Yes, Evangelos Messaris, M.D., PH.D had 38 opioid claims in 2023 with an opioid prescribing rate of 19.2%.
How many Colon & Rectal Surgery Physician providers are there in the US? ▼
There are 1,608 Colon & Rectal Surgery Physician providers across 50 states in the US. The average Colon & Rectal Surgery Physician provider writes 196 Medicare Part D claims per year.
What drugs does Evangelos Messaris, M.D., PH.D prescribe most often? ▼
Based on 2023 Medicare Part D data, Evangelos Messaris, M.D., PH.D's most frequently prescribed drugs include Metronidazole, Gabapentin, Magnesium Sulfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Evangelos Messaris, M.D., PH.D accept Medicare? ▼
Evangelos Messaris, M.D., PH.D appears in CMS Medicare data with 198 Part D claims and 69 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Evangelos Messaris, M.D., PH.D's credentials? ▼
Evangelos Messaris, M.D., PH.D's NPI is 1689892481 with credentials M.D., PH.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.
- 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.