DR. NATHAN CHARLES NOWALK (M.D.) – Internal Medicine Physician, NPI 1003298720
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
9,967 INTERNAL MEDICINE in PA
Provider Addresses for DR. NATHAN CHARLES NOWALK (M.D.)
DEPT OF GME ROOM J-141
5841 S MARYLAND AVENUE MC 105
CHICAGO, IL 60637
Phone:
Type: Mailing
3624 Market St Ste 201
Philadelphia, PA 191042614
Phone: (215) 662-7772
Type: Location
150 HARVESTER DR STE 300
BURR RIDGE, IL 605275965
Phone:
Type: Mailing
5841 S MARYLAND AVE
CHICAGO, IL 606371443
Phone: (888) 824-0200
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 6 Open Payments records for all available years, with a total value of $554.
Total Amount is formed as General ($554) + Research ($0) + Ownership ($0) = $554.
Last reported payment date: 2024-01-25 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($355).
Total Amount
$554
General + Research + Ownership
Payments
6
Total payment records
General Amount
$554
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-01-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $355 |
| GlaxoSmithKline, LLC. | $137 |
| Itamar Medical Inc | $62 |
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: 2025-11-04
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 |
|---|---|---|---|---|
| I20250319000657 | I | Pulmonary Disease | IL | TBD |
| I20251104003179 | I | Internal Medicine | PA | 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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Group practice members
| Name | Specialty | State |
|---|---|---|
| N E U R O S U R G E R Y | IL | |
| Emergency Medicine | IL | |
| Pulmonary Disease, Critical Care (Intensivists) | NC | |
| General Surgery | IN | |
| Pediatric Medicine, Emergency Medicine | IL | |
| - | IL | |
| - | IL | |
| Gastroenterology, Internal Medicine | CT | |
| Cardiovascular Disease (Cardiology) | IL | |
| Internal Medicine | IL |
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