ROBERT ALLAN ALTER (M.D.) – Geriatric Medicine (Internal Medicine) Physician, NPI 1821064585
Geriatric Medicine (Internal Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for ROBERT ALLAN ALTER (M.D.)
West 22nd Street, Oak Brook, DuPage County, Illinois, 60521, United States
SUITE 202
OAK BROOK, IL 605231225
Phone: (630) 320-1160
Fax: (630) 320-1231
Type: Mailing
South Doctor Martin Luther King Junior Drive, Roseland, Chicago, Hyde Park Township, Cook County, Illinois, 60628, United States
CHICAGO, IL 606162441
Phone: (312) 842-7117
Fax: (312) 326-2102
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $17.
Total Amount is formed as General ($17) + Research ($0) + Ownership ($0) = $17.
Last reported payment date: 2023-05-22 • Largest payer in this snapshot: Gilead Sciences, Inc. ($17).
Total Amount
$17
General + Research + Ownership
Payments
1
Total payment records
General Amount
$17
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-05-22
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Gilead Sciences, Inc. | $17 |
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: 2010-03-04
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 |
|---|---|---|---|---|
| I20100304000324 | I | Internal Medicine | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 60523)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Cardiovascular Disease (Cardiology), Internal Medicine | IL | |
| Nephrology, Internal Medicine | IL | |
| A N E S T H E S I O L O G Y | IL | |
| Internal Medicine | IL | |
| Clinical Social Worker | IL | |
| - | MN | |
| - | IL | |
| - | IL | |
| Hospitalist, Internal Medicine | IL | |
| Physician Assistant | NC |
Reviews
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