MARK GREENWALD – Ophthalmology Physician, NPI 1720144975
Ophthalmology Physician
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Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for MARK GREENWALD
5841 S MARYLAND AVE # MC1099
CHICAGO, IL 606371447
Phone:
Type: Mailing
Harvester Drive, Burr Ridge, DuPage County, Illinois, 65027, United States
BURR RIDGE, IL 605276686
Phone: (773) 834-4064
Type: Location
5841 S Maryland Ave
Chicago, IL 606371443
Phone: (888) 824-0200
Type: Location
150 HARVESTER DR
SUITE 300
BURR RIDGE, IL 605275919
Phone:
Type: Mailing
5841 S MARYLAND AVE
CHICAGO, IL 606371443
Phone: (888) 824-0200
Type: Location
777 BANNOCK ST
DENVER, CO 802044597
Phone: (303) 436-4949
Fax: (303) 602-4560
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2023-07-18
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20041112000737 | I | Ophthalmology | IL | TBD |
| I20230718001659 | I | Ophthalmology | CO | 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 60637)
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