NATHANIEL ROBERT STEWART (MD) – Family Medicine Physician, NPI 1063773422
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,517 INTERNAL MEDICINE in IN
Provider Addresses for NATHANIEL ROBERT STEWART (MD)
1122 S IRONWOOD DR
SOUTH BEND, IN 46615
Phone: (574) 335-8399
Fax: (574) 335-0786
Type: Location
1949 Hospital Dr
Martinsville, IN 461511861
Phone: (765) 342-8383
Fax: (765) 349-8413
Type: Location
1122 S Ironwood Dr
South Bend, IN 46615
Phone: (574) 335-8399
Fax: (574) 335-0786
Type: Location
707 CEDAR ST STE 200
SOUTH BEND, IN 466172057
Phone:
Type: Mailing
12563 STATE RD 23
GRANGER, IN 465309226
Phone: (574) 335-8300
Fax: (574) 335-0775
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: 2014-10-21
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 |
|---|---|---|---|---|
| I20141021002161 | I | Internal Medicine | IN | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 526 | 306 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 449 | 303 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 347 | 264 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 250 | 250 | $0 |
| 83036 | Hemoglobin a1c level | 193 | 119 | $0 |
Insurance plans in this area (ZIP 46615)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | IN | 90670 | Pneumococcal vaccine for injection into muscle | 11 | 11 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Family Practice | IN | |
| Nurse Practitioner | IN | |
| - | IN | |
| - | IN | |
| N E U R O L O G Y | IL | |
| - | IN | |
| - | IN | |
| U R O L O G Y | FL | |
| Physician Assistant | MN | |
| Nurse Practitioner | IN |
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