DR. BOB SUN (M.D.) – Rheumatology Physician, NPI 1679657944
Rheumatology Physician
Main info
Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
357 RHEUMATOLOGY in IL
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Provider Addresses for DR. BOB SUN (M.D.)
800, Central Street, Evanston, Evanston Township, Cook County, Illinois, 60201, United States
EVANSTON, IL 602011780
Phone: (847) 570-2503
Fax: (847) 570-1123
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $48.
Total Amount is formed as General ($48) + Research ($0) + Ownership ($0) = $48.
Last reported payment date: 2023-11-12 • Largest payer in this snapshot: Janssen Scientific Affairs, LLC ($48).
Total Amount
$48
General + Research + Ownership
Payments
1
Total payment records
General Amount
$48
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-11-12
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Janssen Scientific Affairs, LLC | $48 |
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: 2007-07-13
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 |
|---|---|---|---|---|
| I20070713000472 | I | Rheumatology | 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 | 615 | 346 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 116 | 76 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 40 | 40 | $0 |
| 20610 | Aspiration and/or injection of fluid from large joint | 36 | 27 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 12 | 12 | $0 |
Insurance plans in this area (ZIP 60201)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| RHEUMATOLOGY | CA | 20610 | Aspiration and/or injection of large joint or joint capsule | 17 | 12 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IL | |
| E N D O C R I N O L O G Y | IL | |
| N E U R O L O G Y | IL | |
| Hospitalist, Internal Medicine | IL | |
| O P H T H A L M O L O G Y | IL | |
| - | IL | |
| E N D O C R I N O L O G Y | IL | |
| Cardiovascular Disease (Cardiology), Interventional Cardiology | IL | |
| Clinical Social Worker | IL | |
| Certified Nurse Midwife (Cnm) | IL |
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