Dr. Sean Patrick Marker, MD
- Medicare services, 2024
- 61
- Medicare patients, 2024
- 50
- Part D claims, 2024
- 273
- Hospital affiliations
- 1
- Industry payments
- $457
- Practice address
- 898 Main St, Winchester, MA 01890-1913
- Practice phone
- Call (781) 721-2737
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Michael W. Marcus, M.d.
Behavioral health practice · Winchester, Massachusetts
Find Dr. Marker's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Sean Patrick Marker is a psychiatrist in Winchester, Massachusetts
Dr. Marker practices at Michael W. Marcus, M.d. in Winchester, Massachusetts.
Dr. Marker's NPI, 1104852011, was assigned on June 23, 2006. Dr. Marker graduated from University of Pittsburgh School of Medicine in 1998. Dr. Marker holds Massachusetts license 214158.
- NPI
- 1104852011NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0840596235
- NPI enumeration date
- June 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (781) 721-2737
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Sean Patrick Marker practices at Michael W. Marcus, M.d. in Winchester, Massachusetts
Dr. Marker's primary practice is Michael W. Marcus, M.d., at 898 Main St, Winchester, MA 01890-1913. The practice phone is (781) 721-2737.
- Michael W. Marcus, M.d.898 Main St, Winchester, MA 01890-1913Phone(781) 721-2737
Source: Dmand AI Affiliation Data
Dr. Sean Patrick Marker is affiliated with 5 sites of care and 4 medical groups
Dr. Marker's primary practice is Michael W. Marcus, M.d. in Winchester, Massachusetts. Dr. Marker is also affiliated with Boston Medical Center. The medical group on file is Marcus Mental Health Associates. Dmand AI also links Dr. Marker to 3 more group practices and clinics and 3 medical groups, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Sean Patrick Marker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marker practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Michael W. Marcus, M.d. | Available with a free account |
| +4 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Sean Patrick Marker is one of 1,857 psychiatrists in Massachusetts
Psychiatry is Dr. Marker's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Marker is licensed in Massachusetts.
Specialties and state licenses
- Psychiatry, MassachusettsPrimary
Psychiatrists near Dr. Marker
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Sean Patrick Marker billed Medicare for 61 services in 2024
CMS data shows 61 Medicare services from Dr. Marker across 3 procedure codes in 2024, for 50 Medicare patients. Medicare paid $6,414 for them. Every service was in an office.
Dr. Marker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 352024: 5043%
- Tests and treatments
- 2023: 482024: 1177%
Dr. Marker compared with the Massachusetts median for psychiatrists, 2024
- Dr. Marker
- Massachusetts median
- Medicare services
- 61vs 17265% below
- Medicare patients
- 50vs 4219% above
- Part D claims
- 135vs 9247% above
Medians across 2,056 psychiatrists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Marker's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marker and other psychiatrists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Sean Patrick Marker treated 50 Medicare patients in 2024, average age 61
CMS counts 50 Medicare patients who saw Dr. Marker in 2024. The largest group is under 65, with 24 patients. 75% of them have anxiety, and 74% have mood disorders. 70% are also on Medicaid. Their average risk score is 1.10, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marker's median patient age at 46, with 46% women.
Dr. Marker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Marker's Medicare patients by sex, 2024
- Women2958%
- Men2142%
Chronic conditions among Dr. Marker's Medicare patients, 2024
- Anxiety75%
- Mood disorders74%
- Depression64%
- High cholesterol58%
- High blood pressure40%
- Arthritis32%
- PTSD28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 46
Patient panel by sex, all payers
- Women46%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Sean Patrick Marker wrote 273 Medicare Part D claims in 2024
In 2024, Dr. Marker wrote 273 Medicare Part D claims for 65 patients. 99% of them were for generic drugs. CMS names the drug for 135 of them, across 7 drugs with 11 or more claims each, at $2,255 in total drug cost. In 2023, CMS named 1,655 claims across 36 drugs.
Dr. Marker's Part D claims by kind of drug, 2024
- Generic270 claims99%
- Brand-name and other3 claims1%
Dr. Marker's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Marker's Part D claims, 2024
- Antipsychotics, patients 65 and over7%18 of 273 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,6552024: 13592%
Drugs named by CMS: 7 in 2024, 36 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Sean Patrick Marker offers telehealth to Medicare patients
Dr. Marker accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Marker as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Sean Patrick Marker received $457 in industry payments from 2023 to 2025
CMS Open Payments shows 21 general payments to Dr. Marker from 9 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Neurocrine BioSciences, Inc. paid the most, $171.
General payments to Dr. Marker by program year, 2023 to 2025
Companies that paid Dr. Marker the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Sean Patrick Marker graduated from University of Pittsburgh School of Medicine
Dr. Marker graduated from University of Pittsburgh School of Medicine in 1998.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Sean Patrick Marker's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Sean Patrick Marker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Sean Patrick Marker's NPI number?
Dr. Sean Patrick Marker's NPI number is 1104852011. It was assigned on June 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Sean Patrick Marker?
Dr. Sean Patrick Marker is a psychiatrist in Winchester, Massachusetts. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Sean Patrick Marker practice?
Dr. Marker practices at 898 Main St, Winchester, MA 01890-1913. Dr. Marker's primary practice is Michael W. Marcus, M.d. in Winchester, Massachusetts. Dmand AI also links Dr. Marker to 3 group practices and clinics and 3 medical groups.
What is Dr. Sean Patrick Marker's office phone number?
The practice phone on file for Dr. Marker is (781) 721-2737.
What is Dr. Sean Patrick Marker's medical license number?
Dr. Marker holds Massachusetts license 214158.
Which hospitals is Dr. Sean Patrick Marker affiliated with?
Dr. Marker is affiliated with Boston Medical Center.
What medical group is Dr. Sean Patrick Marker part of?
Dr. Marker is linked to Marcus Mental Health Associates. Dmand AI links Dr. Marker to 3 more medical groups.
Does Dr. Sean Patrick Marker accept Medicare?
Yes. CMS data shows Dr. Marker billed Medicare for 61 services in 2024, and Dr. Marker accepts Medicare assignment.
Does Dr. Sean Patrick Marker offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Marker as offering telehealth services.
How many Medicare patients does Dr. Sean Patrick Marker see?
CMS counts 50 Medicare patients who saw Dr. Marker in 2024, with an average age of 61.
Show 5 more questionsShow fewer questions
What services does Dr. Sean Patrick Marker bill to Medicare?
In 2024, Dr. Marker's most billed Medicare services were office visit, established patient (99214), care management and other visits (99443) and psychiatric service (90792).
Where did Dr. Sean Patrick Marker go to medical school?
Dr. Marker graduated from University of Pittsburgh School of Medicine in 1998.
What drugs does Dr. Sean Patrick Marker prescribe most?
In 2024 Medicare Part D data, Dr. Marker's most prescribed drugs by claims were Sertraline HCl, Gabapentin and Prazosin HCl.
Has Dr. Sean Patrick Marker received payments from drug or device companies?
CMS Open Payments shows $457 in general payments to Dr. Marker from 9 companies from 2023 to 2025. The largest total came from Neurocrine BioSciences, Inc.
How long has Dr. Sean Patrick Marker been practicing?
Dr. Marker graduated from medical school in 1998, 28 years ago.
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