Doctor profile · Federal record
Dr. Bob Sun, M.D.
Rheumatology Physician (CMS: Rheumatology) · Internal Medicine Physician · Evanston, IL
- NPI 1679657944
- Accepts Medicare
- MIPS 90.4 / 100 · 2023
- 25 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1000 Central St Ste 800
Evanston, IL 602011780
(847) 570-2503
fax (847) 570-1123
Credentials & registration
- NPI registered
- October 2006 — 20 yrs on file
- Profile last updated
- February 10, 2021
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 207RR0500X — NUCC code
- State license (1)
- Illinois #036118325
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1679657944. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
819
Distinct HCPCS
9
Medicare allowed
$92,754
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 325 | 180 | $102 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 290 | 166 | $104 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 64 | 38 | $152 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 52 | 38 | $150 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 21 | 21 | $194 | |
20610 |
Aspiration and/or injection of fluid from large joint | 19 | 13 | $54 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 19 | 19 | $191 | |
20610 |
Aspiration and/or injection of fluid from large joint | 17 | 14 | $53 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 12 | 12 | $185 |
In context: peer comparison
Among 4 peers in Evanston Rheumatology Physician, average services per provider: 116. This provider delivers 7.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,423
Patients
391
Total drug cost
$391,386
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisone | Generic | 267 | 88 | $3,416 |
| Methotrexate (Methotrexate Sodium) | Brand | 225 | 65 | $8,687 |
| Hydroxychloroquine Sulfate | Generic | 219 | 66 | $13,589 |
| Allopurinol | Generic | 165 | 51 | $3,264 |
| Alendronate Sodium | Generic | 98 | 35 | $1,642 |
| Colchicine | Generic | 73 | 21 | $7,280 |
| Sulfasalazine | Generic | 72 | 18 | $2,747 |
| Tramadol Hcl | Generic | 66 | 0 | $944 |
| Leflunomide | Generic | 44 | 14 | $4,409 |
| Folic Acid | Generic | 38 | 0 | $248 |
Hospital affiliations
Frequently asked questions
What is Dr. Bob Sun's medical specialty?
Dr. Bob Sun practices Rheumatology Physician in Evanston, IL.
Where does Dr. Bob Sun practice?
Dr. Bob Sun practices at 1000 Central St Ste 800, Evanston, IL 602011780. Office phone: 8475702503.
What is Dr. Bob Sun's NPI?
Dr. Bob Sun's National Provider Identifier (NPI) is 1679657944, issued by NPPES.
Does Dr. Bob Sun accept Medicare assignment?
Yes. Dr. Bob Sun accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Bob Sun commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99215). Source: CMS Medicare Physician & Other Practitioners file.