KARTHIK SUBBU (M.D.) – Endocrinology, Diabetes & Metabolism Physician, NPI 1760974950
Endocrinology, Diabetes & Metabolism Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
8,824 INTERNAL MEDICINE in IL
Provider Addresses for KARTHIK SUBBU (M.D.)
302 RANDALL RD STE 304
GENEVA, IL 601344205
Phone: (630) 208-6775
Fax: (630) 208-7937
Type: Mailing
1120, West Michigan Street, Indianapolis, Marion, Indiana, 46202, United States
INDIANAPOLIS, IN 462025209
Phone: (317) 278-2694
Fax: (317) 278-2650
Type: Mailing
1120 W Michigan St
Indianapolis, IN 462025209
Phone: (317) 278-2694
Fax: (317) 278-2650
Type: Location
100 Eastowne Dr
Chapel Hill, NC 275142286
Phone: (984) 974-2950
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
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: 2023-08-17
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 |
|---|---|---|---|---|
| I20230817003191 | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 28 | 24 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 21 | 21 | $0 |
| 95251 | Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 16 | 13 | $0 |
| 83036 | Hemoglobin a1c level | 11 | 11 | $0 |
Insurance plans in this area (ZIP 60134)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| General Surgery | IL | |
| Vascular Surgery | IL | |
| - | IL | |
| Nurse Practitioner | IL | |
| - | IL | |
| C H I R O P R A C T I C | IL | |
| Family Practice | IL | |
| Physical Medicine And Rehabilitation | CO | |
| - | IL | |
| Hospitalist, Family Practice | IL |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.