Doctor profile · Federal record
Dr. John Case, M.D.
Rheumatology Physician (CMS: General Practice) · Internal Medicine Physician · Chicago, IL
- NPI 1104840123
- Accepts Medicare
- MIPS 78.2 / 100 · 2023
- 41 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
1901 W Harrison St
Chicago, IL 606123714
(312) 864-7268
fax (312) 864-9494
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- April 22, 2021
- Year of graduation
- 1985 — 41 yrs since
- Specialty taxonomy
- 207RR0500X — NUCC code
- State license (1)
- Illinois #036-073570
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1104840123. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
224
Distinct HCPCS
2
Medicare allowed
$22,820
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 185 | 89 | $105 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 39 | 30 | $86 |
In context: peer comparison
Among 36 peers in this city , average services per provider: 1,230. This provider delivers 0.2× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
891
Patients
219
Total drug cost
$1,039,149
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Tramadol Hcl | Generic | 145 | 21 | $1,130 |
| Prednisone | Generic | 144 | 49 | $892 |
| Leflunomide | Generic | 74 | 24 | $4,170 |
| Humira Pen (Adalimumab) | Brand | 70 | 0 | $350,058 |
| Hydroxychloroquine Sulfate | Generic | 67 | 23 | $4,018 |
| Methotrexate (Methotrexate Sodium) | Brand | 59 | 23 | $1,468 |
| Allopurinol | Generic | 49 | 19 | $532 |
| Gabapentin | Generic | 43 | 19 | $826 |
| Pantoprazole Sodium | Generic | 43 | 13 | $342 |
| Azathioprine | Generic | 40 | 16 | $2,699 |
Hospital affiliations
Frequently asked questions
What is Dr. John Case's medical specialty?
Dr. John Case practices Rheumatology Physician in Chicago, IL.
Where does Dr. John Case practice?
Dr. John Case practices at 1901 W Harrison St, Chicago, IL 606123714. Office phone: 3128647268.
What is Dr. John Case's NPI?
Dr. John Case's National Provider Identifier (NPI) is 1104840123, issued by NPPES.
Does Dr. John Case accept Medicare assignment?
Yes. Dr. John Case accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Case 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 99213). Source: CMS Medicare Physician & Other Practitioners file.