MARIAM SIDDIQUI M.D.
Prescription History 1912296708
Internal Medicine - Rheumatology in Chicago, IL
What does Dr. Siddiqui prescribe?
In 2024, Dr. Siddiqui wrote 1,655 Medicare prescriptions for 30 medications. The most prescribed was Prednisone, with 314 prescriptions for 88 patients.
Medicare Part D only. These are prescriptions filled by people with Medicare drug coverage in 2024, from the CMS data released in 2026, the most recent year available. CMS does not publish medications with fewer than 11 prescriptions, so this is not a full list of what Dr. Siddiqui prescribes.
Medications 30 medications
Prescriptions filled under Medicare Part D in 2024. Select a medication to see what it is used for and how it compares with other Illinois prescribers.
What it is used for
Prednisone is used to treat conditions such as arthritis, blood disorders, breathing problems, severe allergies, skin diseases, cancer, eye problems, and immune system disorders.
Compared with Illinois prescribers
Dr. Siddiqui wrote 314 prescriptions for Prednisone, about 6.8 times as often as the typical Illinois prescriber of it (46). Medicare paid $7.45 per fill, versus $3.88 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Hydroxychloroquine is used to prevent or treat malaria caused by mosquito bites.
Compared with Illinois prescribers
Dr. Siddiqui wrote 294 prescriptions for Hydroxychloroquine Sulfate, about 3.2 times as often as the typical Illinois prescriber of it (92). Medicare paid $28.17 per fill, versus $36.28 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Methotrexate is used to treat certain types of cancer (such as acute lymphoblastic leukemia, non-Hodgkin's lymphoma), severe psoriasis that has not responded to other treatments, or rheumatoid arthritis.
Compared with Illinois prescribers
Dr. Siddiqui wrote 157 prescriptions for Methotrexate, about 1.6 times as often as the typical Illinois prescriber of it (96). Medicare paid $38.67 per fill, versus $25.89 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Allopurinol is used to treat gout and certain types of kidney stones.
Compared with Illinois prescribers
Dr. Siddiqui wrote 99 prescriptions for Allopurinol, about 1.8 times as often as the typical Illinois prescriber of it (56). Medicare paid $8.84 per fill, versus $9.73 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat rheumatoid arthritis, a condition in which the body's defense system (immune system) fails to recognize the body as itself and attacks the healthy tissues around the joints.
Compared with Illinois prescribers
Dr. Siddiqui wrote 71 prescriptions for Leflunomide, about as often as the typical Illinois prescriber of it (62). Medicare paid $64.24 per fill, versus $56.04 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Tofacitinib is used to treat certain types of arthritis (such as psoriatic arthritis, rheumatoid arthritis, ankylosing spondylitis).
Compared with Illinois prescribers
Dr. Siddiqui wrote 65 prescriptions for Xeljanz Xr, about 2.8 times as often as the typical Illinois prescriber of it (23). Medicare paid $6,381.36 per fill, versus $6,176.37 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to prevent or treat gout attacks (flares).
Compared with Illinois prescribers
Dr. Siddiqui wrote 53 prescriptions for Colchicine, about 2.4 times as often as the typical Illinois prescriber of it (22). Medicare paid $41.21 per fill, versus $54.96 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Adalimumab is used to reduce pain and swelling due to certain types of arthritis (such as rheumatoid, psoriatic, juvenile idiopathic, ankylosing spondylitis).
Compared with Illinois prescribers
Dr. Siddiqui wrote 52 prescriptions for Humira(Cf) Pen, about 1.4 times as often as the typical Illinois prescriber of it (37). Medicare paid $6,793.55 per fill, versus $8,648.95 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Sulfasalazine is used to treat a certain type of bowel disease called ulcerative colitis.
Compared with Illinois prescribers
Dr. Siddiqui wrote 50 prescriptions for Sulfasalazine Dr, about 1.5 times as often as the typical Illinois prescriber of it (33). Medicare paid $29.81 per fill, versus $43.56 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain mental/mood disorders (such as depression, anxiety).
Compared with Illinois prescribers
Dr. Siddiqui wrote 49 prescriptions for Duloxetine Hcl, about as often as the typical Illinois prescriber of it (53). Medicare paid $13.40 per fill, versus $21.99 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat rheumatoid arthritis, a condition in which the body's own defense system (immune system) attacks healthy tissue.
Compared with Illinois prescribers
Dr. Siddiqui wrote 45 prescriptions for Orencia Clickject, about 1.7 times as often as the typical Illinois prescriber of it (27). Medicare paid $5,533.75 per fill, versus $6,157.27 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Upadacitinib is used to treat certain types of arthritis (such as psoriatic arthritis, rheumatoid arthritis, axial spondyloarthritis, polyarticular juvenile idiopathic arthritis- pJIA).
Compared with Illinois prescribers
Dr. Siddiqui wrote 42 prescriptions for Rinvoq, about 1.3 times as often as the typical Illinois prescriber of it (32). Medicare paid $6,169.52 per fill, versus $7,096.77 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Gabapentin is used with other medications to prevent and control seizures.
Compared with Illinois prescribers
Dr. Siddiqui wrote 37 prescriptions for Gabapentin, about half as often as the typical Illinois prescriber of it (87). Medicare paid $13.69 per fill, versus $15.83 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Cyclobenzaprine is used short-term to treat muscle spasms.
Compared with Illinois prescribers
Dr. Siddiqui wrote 35 prescriptions for Cyclobenzaprine Hcl, about as often as the typical Illinois prescriber of it (35). Medicare paid $10.25 per fill, versus $8.56 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Methylprednisolone is used to treat conditions such as arthritis, blood disorders, severe allergic reactions, certain cancers, eye conditions, skin/kidney/intestinal/lung diseases, and immune system disorders.
Compared with Illinois prescribers
Dr. Siddiqui wrote 32 prescriptions for Methylprednisolone, about as often as the typical Illinois prescriber of it (34). Medicare paid $9.63 per fill, versus $5.95 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Alendronate is used to prevent and treat certain types of bone loss (osteoporosis) in adults.
Compared with Illinois prescribers
Dr. Siddiqui wrote 29 prescriptions for Alendronate Sodium, about half as often as the typical Illinois prescriber of it (49). Medicare paid $11.81 per fill, versus $8.38 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
See also Warning section.
Compared with Illinois prescribers
Dr. Siddiqui wrote 27 prescriptions for Diclofenac Sodium, about 75% as often as the typical Illinois prescriber of it (36). Medicare paid $22.05 per fill, versus $32.63 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with Illinois prescribers
Dr. Siddiqui wrote 24 prescriptions for Omeprazole, about 25% as often as the typical Illinois prescriber of it (96). Medicare paid $7.17 per fill, versus $11.25 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Sulfasalazine is used to treat a certain type of bowel disease called ulcerative colitis.
Compared with Illinois prescribers
Dr. Siddiqui wrote 22 prescriptions for Sulfasalazine, about 64% as often as the typical Illinois prescriber of it (34). Medicare paid $53.91 per fill, versus $26.39 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Azathioprine is used to prevent organ rejection in people who have received a kidney transplant.
Compared with Illinois prescribers
Dr. Siddiqui wrote 21 prescriptions for Azathioprine, about 87% as often as the typical Illinois prescriber of it (24). Medicare paid $80.98 per fill, versus $56.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Folic acid is the man-made form of folate.
Compared with Illinois prescribers
Dr. Siddiqui wrote 18 prescriptions for Folic Acid, about 77% as often as the typical Illinois prescriber of it (23). Medicare paid $13.78 per fill, versus $8.12 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Meloxicam is used to treat arthritis.
Compared with Illinois prescribers
Dr. Siddiqui wrote 17 prescriptions for Meloxicam, about 32% as often as the typical Illinois prescriber of it (53). Medicare paid $6.76 per fill, versus $4.12 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Methotrexate is used to treat severe psoriasis that has not responded to other treatments or rheumatoid arthritis.
Compared with Illinois prescribers
Dr. Siddiqui wrote 16 prescriptions for Rasuvo, about 84% as often as the typical Illinois prescriber of it (19). Medicare paid $822.83 per fill, versus $644.78 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat rheumatoid arthritis, polyarticular juvenile idiopathic arthritis (pJIA), or polymyalgia rheumatica (PMR).
Compared with Illinois prescribers
Dr. Siddiqui wrote 15 prescriptions for Kevzara, about 87% as often as the typical Illinois prescriber of it (17). Medicare paid $4,195.26 per fill, versus $4,370.67 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
See also Warning section.
Compared with Illinois prescribers
Dr. Siddiqui wrote 14 prescriptions for Naproxen, about half as often as the typical Illinois prescriber of it (26). Medicare paid $25.74 per fill, versus $10.65 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used alone or in combination with an immunosuppressant (such as methotrexate) to treat certain types of arthritis (such as rheumatoid, psoriatic, juvenile idiopathic, and ankylosing spondylitis).
Compared with Illinois prescribers
Dr. Siddiqui wrote 12 prescriptions for Enbrel, about half as often as the typical Illinois prescriber of it (22). Medicare paid $7,118.02 per fill, versus $8,065.14 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
See also Warning section.
Compared with Illinois prescribers
Dr. Siddiqui wrote 12 prescriptions for Tramadol Hcl, about 21% as often as the typical Illinois prescriber of it (57). Medicare paid $3.59 per fill, versus $5.65 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used alone or in combination with an immunosuppressant (such as methotrexate) to treat certain types of arthritis (such as rheumatoid, psoriatic, juvenile idiopathic, and ankylosing spondylitis).
Compared with Illinois prescribers
Dr. Siddiqui wrote 11 prescriptions for Enbrel Sureclick, about 29% as often as the typical Illinois prescriber of it (38). Medicare paid $7,234.44 per fill, versus $8,164.14 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
See also Warning section.
Compared with Illinois prescribers
Dr. Siddiqui wrote 11 prescriptions for Etodolac, about 37% as often as the typical Illinois prescriber of it (30). Medicare paid $12.67 per fill, versus $27.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Mycophenolate is used in combination with other medications to keep your body from attacking and rejecting your transplanted organ (such as kidney, liver, heart).
Compared with Illinois prescribers
Dr. Siddiqui wrote 11 prescriptions for Mycophenolate Mofetil, about 38% as often as the typical Illinois prescriber of it (29). Medicare paid $100.05 per fill, versus $117.95 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Dr. Siddiqui’s prescriptions
What does Dr. Siddiqui prescribe most?
In 2024 Medicare Part D data, Dr. Siddiqui's most prescribed medications were Prednisone (314), Hydroxychloroquine Sulfate (294) and Methotrexate (157).
How does Dr. Siddiqui's prescribing compare with other Illinois prescribers?
Of the 30 medications with a state comparison, Dr. Siddiqui prescribes 10 more often than the typical Illinois prescriber, 9 about as often and 11 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Siddiqui prescribes?
No. It covers prescriptions filled by people with Medicare Part D drug coverage in 2024, and CMS leaves out any medication with fewer than 11 prescriptions.
About this data
This page shows one provider’s slice of public Medicare files. NPI Profile does not receive prescriptions or patient records.
| Source | What it provides here | Data year |
|---|---|---|
| CMS Medicare Part D Prescribers by Provider and Drug | Each medication, prescriptions, patients, 30-day fills, days of medication and cost. State comparisons average the Illinois prescribers of the same medication and form, where at least five wrote it. | 2024 (released 2026, the most recent available) |
| CMS Medicare Part D Drug Spending Dashboard | What each medication is used for. | 2024 |
- Only prescriptions filled by people with Medicare Part D drug coverage are counted. Private insurance, Medicaid and cash purchases are not.
- CMS leaves out medications with fewer than 11 prescriptions and hides patient counts under 11.
- Cost per fill is what the plan and the patient paid the pharmacy together, not what you pay at the counter.
- Medication descriptions are summaries from CMS. They are not medical advice; ask a health care professional about any medication.
