SEAMUS MARK (M.D.) – Family Medicine Physician, NPI 1538212477
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,899 FAMILY PRACTICE in MA
Provider Addresses for SEAMUS MARK (M.D.)
969 MAIN STREET
SUITE 205
MILLIS, MA 02054
Phone: (508) 376-3000
Fax: (508) 376-3024
Type: Location
700;900, Union Street, Baystate Commons, Westborough, Worcester County, Massachusetts, 01581, United States
WESTBOROUGH, MA 015815408
Phone: (508) 871-0700
Fax: (508) 616-4411
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2009-09-15
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20090915000148 | I | Family Practice | MA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 101 | 95 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 50 | 50 | $0 |
| 80061 | Blood test, lipids (cholesterol and triglycerides) | 46 | 43 | $0 |
| 80048 | Blood test, basic group of blood chemicals (calcium, total) | 39 | 33 | $0 |
| 83036 | Hemoglobin a1c level | 35 | 32 | $0 |
Insurance plans in this area (ZIP 02054)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| FAMILY MEDICINE | MA | 90670 | Pneumococcal vaccine for injection into muscle | 16 | 16 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| N E U R O L O G Y | MA | |
| Family Practice | NY | |
| Internal Medicine | MA | |
| - | MA | |
| - | MA | |
| - | CO | |
| - | MA | |
| - | MA | |
| Pulmonary Disease, Critical Care (Intensivists), Internal Medicine | MA | |
| - | MA |
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