M.BASSEL ATASSI (M.D.) – Hematology & Oncology Physician, NPI 1689876328
Hematology & Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
727 HEMATOLOGY/ONCOLOGY in IL
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Provider Addresses for M.BASSEL ATASSI (M.D.)
Little Company of Mary Hospital, 2800, West 95th Street, Evergreen Park, Worth Township, Cook County, Illinois, 60805, United States
CANCER CENTER
EVERGREEN PARK, IL 608052701
Phone: (708) 229-6020
Fax: (708) 229-6083
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 68 Open Payments records for all available years, with a total value of $1,765.
Total Amount is formed as General ($1,765) + Research ($0) + Ownership ($0) = $1,765.
Last reported payment date: 2024-12-04 • Largest payer in this snapshot: PFIZER INC. ($263).
Total Amount
$1,765
General + Research + Ownership
Payments
68
Total payment records
General Amount
$1,765
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-04
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| PFIZER INC. | $263 |
| Merck Sharp & Dohme LLC | $212 |
| Boston Scientific Corporation | $119 |
| AstraZeneca Pharmaceuticals LP | $118 |
| Genentech USA, Inc. | $115 |
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: 2013-08-12
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 |
|---|---|---|---|---|
| I20130812000766 | I | Hematology/Oncology | IL | 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 | 445 | 176 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 171 | 95 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 130 | 118 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 118 | 67 | $0 |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 104 | 66 | $0 |
Insurance plans in this area (ZIP 60805)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | IL | |
| - | IL | |
| - | TN | |
| - | IL | |
| - | IL | |
| - | IL | |
| - | IL | |
| - | IL | |
| Physician Assistant | MO | |
| - | IL |
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