NPI registry status
Active
2026 NPPES data Psychiatry Physician NPI 1104852011 MD
Verify on CMS → Sean Marker, MD
Psychiatry Physician in Dorchester Center, 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 54,383 in Psychiatry 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
273
Medicare Part D claims · 65 beneficiaries · Psychiatry Physician avg: 1K
Industry payments
$135.1
7 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Sean Marker, MD filed 273 Medicare Part D claims in 2024 as a Psychiatry Physician in Dorchester Center, Massachusetts.
- 273
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥48th
- 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 Sean Marker, MD
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 1104852011), first enumerated 06/23/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 273 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
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$135.1 in reported industry payments (7 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 Sean Marker, MD'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 1104852011 · Psychiatry Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1104852011
- ENUM-LEGACY 2006
- TAX-MEGA 54K Psychiatry Physician
- RX-LIGHT 273
- BOOK-LIGHT 2,637 in Massachusetts
- PHOTO-ENUM Rizalino Cruz · 2006
Sean Marker, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
273 ≥ 48th percentile 48% 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)
Sean Marker, MD 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 Sean Marker, MD?
Quality data not reportedPrimary specialty
Psychiatry Physician
Medicare Part D claims
273 73% vs specialty avg
Specialty distribution in Massachusetts
How Psychiatry 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 Psychiatry 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 | 1104852011 |
|---|---|
| Specialty | Psychiatry Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/23/2006 |
Hospital and facility affiliations
Facilities where Sean Marker, 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.
Dothouse Health Inc.
Dorchester, MA
Michael W. Marcus, M.D., P.C.
Winchester, 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 Sean Marker, MD. Source: openpaymentsdata.cms.gov.
Total received
$135
Largest payer
Neurocrine Biosciences, 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 Sean Marker, MD. To verify Sean Marker, MD'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
273
Total Claims
$5K
Total Drug Cost
65
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 388.233
- Total Day Supply
- 11,597
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 67.8 years
- Avg HCC Risk Score
- 0.97
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 17, 65-74: 33, 75-84: N/A, 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 Sean Marker, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Sertraline Hcl
Sertraline Hcl
36 claims
- Gabapentin
Gabapentin
20 claims
- Prazosin Hcl
Prazosin Hcl
19 claims
- Mirtazapine
Mirtazapine
18 claims
- Trazodone Hcl
Trazodone Hcl
18 claims
- Alprazolam 13
Alprazolam
13 claims
- Risperidone 11
Risperidone
11 claims
| Drug | Claims |
|---|---|
| Sertraline Hcl | 36 |
| Gabapentin | 20 |
| Prazosin Hcl | 19 |
| Mirtazapine | 18 |
| Trazodone Hcl | 18 |
| Alprazolam | 13 |
| Risperidone | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Psychiatry Physician Overview
How Sean Marker, MD fits within the Psychiatry Physician landscape nationally.
54,383
Psychiatry Physician Providers in US
56
States with Psychiatry Physician
1,010
Avg Claims per Provider
Sean Marker, MD's 273 claims are below the specialty average of 1,010.
Nationwide Psychiatry Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Marker, 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 Psychiatry Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Marker.
One of 2,637 Psychiatry Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Karen Abdool
M.D., PH.D
Lynn, MA
Dr. Harmony Abejuela
M.D.
Quincy, MA
Marielle Abell
PA
Amherst, MA
Dr. Steven Ablon
MD
Boston, MA
Dr. Keith Ablow
M.D.
Newbury, MA
Compare Psychiatry Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Sean Marker, MD's specialty? ▼
Sean Marker, MD specializes in Psychiatry Physician and practices in Dorchester Center, Massachusetts. Credentials: MD.
How much does Sean Marker, MD prescribe under Medicare Part D? ▼
In 2024, Sean Marker, MD wrote 273 Medicare Part D claims totaling $5K in drug costs for 65 beneficiaries.
Where is Sean Marker, MD located? ▼
Sean Marker, MD is located at 2100 DORCHESTER AVE, Dorchester Center, MA, 02124. Phone: (617) 296-4000.
What is Sean Marker, MD's NPI number? ▼
Sean Marker, MD's National Provider Identifier (NPI) is 1104852011, issued on 06/23/2006.
How many Psychiatry Physician providers are there in the US? ▼
There are 54,383 Psychiatry Physician providers across 56 states in the US. The average Psychiatry Physician provider writes 1,010 Medicare Part D claims per year.
What drugs does Sean Marker, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Sean Marker, MD's most frequently prescribed drugs include Sertraline Hcl, Gabapentin, Prazosin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sean Marker, MD accept Medicare? ▼
Sean Marker, MD appears in CMS Medicare data with 273 Part D claims and 65 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sean Marker, MD's credentials? ▼
Sean Marker, MD's NPI is 1104852011 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.
- 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.