DR. ISSAM A ONEYSSI (M.D.) – Internal Medicine Physician, NPI 1528026622
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
7,722 INTERNAL MEDICINE in MA
Provider Addresses for DR. ISSAM A ONEYSSI (M.D.)
421 N Main St
Leeds, MA 010539764
Phone: (413) 584-4040
Type: Location
Harrington Hospital, 100, South Street, Globe Village, Southbridge, Worcester County, Massachusetts, 01550, United States
SOUTHBRIDGE, MA 015504051
Phone: (508) 765-9771
Fax: (508) 909-7735
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 19 Open Payments records for all available years, with a total value of $674.
Total Amount is formed as General ($674) + Research ($0) + Ownership ($0) = $674.
Last reported payment date: 2024-11-06 • Largest payer in this snapshot: PFIZER INC. ($203).
Total Amount
$674
General + Research + Ownership
Payments
19
Total payment records
General Amount
$674
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-06
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| PFIZER INC. | $203 |
| Davol Inc. | $161 |
| Endo USA, Inc. | $126 |
| AstraZeneca Pharmaceuticals LP | $72 |
| Alexion Pharmaceuticals, Inc. | $49 |
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: 2004-04-08
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 |
|---|---|---|---|---|
| I20040408000747 | 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 |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 287 | 135 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 99 | 43 | $0 |
| 99291 | Critical care, first 30-74 minutes | 78 | 29 | $0 |
| 99238 | Hospital discharge day management, 30 minutes or less | 77 | 75 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 34 | 33 | $0 |
Insurance plans in this area (ZIP 01053)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Certified Registered Nurse Anesthetist (Crna) | MA | |
| - | MA | |
| - | MA | |
| Family Practice | MA | |
| Physician Assistant | MA | |
| Cardiac Electrophysiology, Cardiovascular Disease (Cardiology), Cardiovascular Disease (Cardiology) | MA | |
| A N E S T H E S I O L O G Y | NY | |
| Pulmonary Disease, Critical Care (Intensivists), Allergy/Immunology | MA | |
| - | MA | |
| E N D O C R I N O L O G Y | MA |
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