Doctor profile · Federal record
Dr. Mary Mahieu, M.D.
Rheumatology Physician (CMS: Rheumatology) · Chicago, IL
- NPI 1811218381
- Accepts Medicare
- MIPS 91.3 / 100 · 2023
- 16 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
675 N Saint Clair St, Galter 14-100
Chicago, IL 606115975
(312) 695-8628
fax (312) 695-0110 - Mailing address
-
240 E Huron St, McGaw M-300
Chicago, IL 606112909
Credentials & registration
- NPI registered
- June 2010 — 16 yrs on file
- Profile last updated
- August 30, 2016
- Year of graduation
- 2010 — 16 yrs since
- Specialty taxonomy
- 207RR0500X — NUCC code
- State license (1)
- Illinois #036131440
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1811218381. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
7,033
Distinct HCPCS
10
Medicare allowed
$225,252
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J1602 |
Injection, golimumab, 1 mg, for intravenous use | 2,900 | 11 | $13 | |
J1745 |
Injection, infliximab, excludes biosimilar, 10 mg | 1,770 | 16 | $33 | |
J0129 |
Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) | 1,475 | 16 | $40 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 193 | 123 | $133 | |
J3489 |
Injection, zoledronic acid, 1 mg | 155 | 31 | $9 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 124 | 74 | $184 | |
96365 |
Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | 91 | 75 | $68 | |
36415 |
Insertion of needle into vein for collection of blood sample | 85 | 64 | $8 | |
J3301 |
Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 84 | 17 | $1 | |
96413 |
Administration of chemotherapy into vein, 1 hour or less | 66 | 38 | $139 |
In context: peer comparison
Among 36 peers in Chicago Rheumatology Physician, average services per provider: 1,230. This provider delivers 5.7× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
941
Patients
253
Total drug cost
$845,506
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydroxychloroquine Sulfate | Generic | 234 | 82 | $16,349 |
| Prednisone | Generic | 155 | 51 | $2,473 |
| Methotrexate (Methotrexate Sodium) | Brand | 154 | 54 | $10,879 |
| Leflunomide | Generic | 51 | 19 | $5,247 |
| Humira(Cf) Pen (Adalimumab) | Brand | 48 | 0 | $497,033 |
| Colchicine | Generic | 40 | 15 | $3,412 |
| Azathioprine | Generic | 39 | 14 | $5,818 |
| Allopurinol | Generic | 34 | 0 | $641 |
| Enbrel Sureclick (Etanercept) | Brand | 31 | 0 | $297,815 |
| Mycophenolate Mofetil | Generic | 30 | 0 | $3,825 |
Hospital affiliations
Frequently asked questions
What is Dr. Mary Mahieu's medical specialty?
Dr. Mary Mahieu practices Rheumatology Physician in Chicago, IL.
Where does Dr. Mary Mahieu practice?
Dr. Mary Mahieu practices at 675 N Saint Clair St, Chicago, IL 606115975. Office phone: 3126958628.
What is Dr. Mary Mahieu's NPI?
Dr. Mary Mahieu's National Provider Identifier (NPI) is 1811218381, issued by NPPES.
Does Dr. Mary Mahieu accept Medicare assignment?
Yes. Dr. Mary Mahieu accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mary Mahieu commonly perform?
Top Medicare-reported procedures in 2023: Injection, golimumab, 1 mg, for intravenous use (HCPCS J1602); Injection, infliximab, excludes biosimilar, 10 mg (HCPCS J1745); Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) (HCPCS J0129). Source: CMS Medicare Physician & Other Practitioners file.