AMMAR HASSAN (D.O.) – Internal Medicine Physician, NPI 1023428877
Internal Medicine Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
3,511 INTERNAL MEDICINE in IN
Provider Addresses for AMMAR HASSAN (D.O.)
9731 PRAIRIE AVE
HIGHLAND, IN 463223616
Phone: (219) 922-4900
Type: Mailing
2650 RIDGE AVE
EVANSTON, IL 602011718
Phone:
Type: Mailing
500 S Weber Rd
Romeoville, IL 604466528
Phone: (815) 773-7732
Type: Location
9410 CALUMET AVE STE 401
MUNSTER, IN 463210018
Phone: (219) 922-4900
Fax: (219) 836-9922
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 140 Open Payments records for all available years, with a total value of $2,511.
Total Amount is formed as General ($2,511) + Research ($0) + Ownership ($0) = $2,511.
Last reported payment date: 2024-12-23 • Largest payer in this snapshot: ABBVIE INC. ($407).
Total Amount
$2,511
General + Research + Ownership
Payments
140
Total payment records
General Amount
$2,511
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-23
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $407 |
| Takeda Pharmaceuticals U.S.A., Inc. | $405 |
| Janssen Biotech, Inc. | $306 |
| Celgene Corporation | $297 |
| Endogastric Solutions, Inc | $170 |
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: 2026-01-20
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20200717000675 | I | Gastroenterology | IN | TBD |
| I20260120002065 | I | Gastroenterology | 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 |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 398 | 194 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 185 | 152 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 173 | 160 | $0 |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 149 | 137 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 141 | 131 | $0 |
Insurance plans in this area (ZIP 46322)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | IL | |
| Interventional Cardiology, Cardiovascular Disease (Cardiology), Internal Medicine | IL | |
| P S Y C H I A T R Y | IL | |
| Internal Medicine | IL | |
| Family Practice | IL | |
| Interventional Cardiology, Cardiovascular Disease (Cardiology) | IL | |
| Internal Medicine | IL | |
| Family Practice | IL | |
| Internal Medicine, Emergency Medicine | MI | |
| Family Practice, Emergency Medicine | IL |
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