DR. MARK STEPHAN OSTREM (MD) – Geriatric Medicine (Internal Medicine) Physician, NPI 1811985633
Geriatric Medicine (Internal Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
7,722 INTERNAL MEDICINE in MA
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Provider Addresses for DR. MARK STEPHAN OSTREM (MD)
362, North Bedford Street, East Bridgewater, Plymouth County, Massachusetts, 11333, United States
EAST BRIDGEWATER, MA 023331148
Phone: (617) 481-3300
Fax: (617) 481-3305
Type: Mailing
Aspire Health Alliance, 54, Miller Street, North Commons, Quincy, Norfolk County, Massachusetts, 02169, United States
SUITE 300
QUINCY, MA 021694725
Phone: (617) 481-3300
Fax: (617) 481-3305
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $191.
Total Amount is formed as General ($191) + Research ($0) + Ownership ($0) = $191.
Last reported payment date: 2023-03-13 • Largest payer in this snapshot: Neurocrine BioSciences, Inc. ($191).
Total Amount
$191
General + Research + Ownership
Payments
2
Total payment records
General Amount
$191
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-03-13
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Neurocrine BioSciences, Inc. | $191 |
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: 2004-12-15
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 |
|---|---|---|---|---|
| I20041215000212 | I | Internal Medicine | 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 |
|---|---|---|---|---|
| 99309 | Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 1,646 | 186 | $0 |
| 99308 | Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes | 267 | 109 | $0 |
| 99306 | Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 107 | 95 | $0 |
| 99497 | Advance care planning, first 30 minutes | 85 | 71 | $0 |
| 99406 | Smoking and tobacco use intensive counseling, 4-10 minutes | 51 | 16 | $0 |
Insurance plans in this area (ZIP 02333)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | MA | 83036 | Hemoglobin A1C level | 169 | 65 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | MA | |
| Internal Medicine | MA | |
| Nurse Practitioner | MA | |
| Nurse Practitioner | MA | |
| Internal Medicine | MA | |
| Nurse Practitioner | MA | |
| Nurse Practitioner | MA | |
| Internal Medicine | MA | |
| Emergency Medicine | MA | |
| Nurse Practitioner | MA |
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