ROBERT S. MATHIAS (MD) – Pediatric Nephrology Physician, NPI 1215965595
Pediatric Nephrology Physician
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NPPES metrics only — not quality of care.
1,158 PEDIATRIC MEDICINE in IL
Provider Addresses for ROBERT S. MATHIAS (MD)
9555 S 52nd Ave
Oak Lawn, IL 604533054
Phone: (708) 684-5437
Type: Location
1717 S. Orange Ave.
Suite 100
Orlando, FL 328062946
Phone: (407) 650-7715
Fax: (407) 650-7124
Type: Location
191, Mill Street, Rockport, Knox County, Maine, 04856, United States
PROVIDER ENROLLMENT DEPARTMENT
ROCKLAND, DE 197320191
Phone: (407) 650-7129
Fax: (302) 651-4945
Type: Mailing
1717, South Orange Avenue, Orlando, Orange County, Florida, 32806, United States
SUITE 100
ORLANDO, FL 328062946
Phone: (407) 650-7715
Fax: (407) 650-7124
Type: Location
PO BOX 100296 PROVIDER ENROLLMENT DEPARTMENT
GAINESVILLE, FL 326100001
Phone: (352) 627-9350
Fax: (352) 273-9054
Type: Mailing
1600 SW ARCHER RD
GAINESVILLE, FL 326103003
Phone: (352) 265-7906
Type: Location
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: 2026-01-08
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 4 Medicare enrollment records; no due dates published yet.
Enrollment records
4
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 |
|---|---|---|---|---|
| I20070104000335 | I | Nephrology | FL | TBD |
| I20220921002837 | I | Pediatric Medicine | ND | TBD |
| I20230421000469 | I | Pediatric Medicine | IL | TBD |
| I20260108003853 | I | Pediatric Medicine | MS | 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 60453)
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