JOHN D AYERS MD
Prescription History 1477540821
Internal Medicine - Hematology & Oncology in Warrenville, IL

Active since September 30, 2005PECOS EnrolledAccepts Medicare Assignment
94.1/100
CMS Quality Rating
4405 WEAVER PKWY, WARRENVILLE, IL 60555(630) 352-5450(630) 352-5499 Get Directions

NPPES record last updated: January 22, 2013. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Medicare Part D Prescription History

Explore the verified Medicare Part D prescription history, volume metrics, and calculated drug costs for JOHN D AYERS MD, an active Hematology & Oncology specialist practicing in Warrenville, IL. Our medical registry currently tracks 13 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 771 documented patient claims. Among these therapy options, the most frequently utilized medication is Tamoxifen Citrate, which accounts for 254 claims alone. Use the table below to sort by claims, cost, or utilization compared with the state average; select any medication for its full profile.

13
Medications
771
Total Claims
1,913
30-Day Fills
Tamoxifen Citrate
Most Prescribed · 254 claims
View details
13 medications · 2023 Medicare Part D
Medicare Part D medications prescribed by JOHN D AYERS MD in 2023, with prescription volumes, average cost per fill, and IL state comparisons
Medication Prescriptions (2023)Rx (2023) Avg Cost per FillCost / Fill Vs. Other IL PrescribersVs. IL Avg

About Tamoxifen Citrate: Tamoxifen is used to treat breast cancer. Show more ▾

It is also used to reduce the chances of breast cancer in high-risk patients. This medication can block the growth of breast cancer. It works by interfering with the effects of estrogen in the breast tissue. One of the SELECTIVE ESTROGEN RECEPTOR MODULATORS with tissue-specific activities. Tamoxifen acts as an anti-estrogen (inhibiting agent) in the mammary tissue, but as an estrogen (stimulating agent) in cholesterol metabolism, bone density, and cell proliferation in the ENDOMETRIUM.

In 2023, this provider wrote 254 Medicare prescriptions for Tamoxifen Citrate, about 7.9 times the volume of the typical Illinois prescriber of this medication (32). Medicare paid an average of $35.90 per fill, versus $38.43 statewide.

How often this provider prescribes it

This provider
254
IL average
32.0

This provider prescribes this medication more often than the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$35.90
IL average
$38.43

This provider's average cost per fill is below the IL average for this medication.

737.9
30-Day Fills
standardized to 30-day supplies
22,137
Days of Medication
total across all patients in 2023

About Raloxifene Hcl: Raloxifene is used by women to prevent and treat bone loss (osteoporosis) after menopause. Show more ▾

It slows down bone loss and helps to keep bones strong, making them less likely to break. Raloxifene may also lower the chance of getting a certain type of breast cancer (invasive breast cancer) after menopause. Raloxifene is not an estrogen hormone, but it acts like estrogen in some parts of the body, like your bones. In other parts of the body (uterus and breasts), raloxifene acts like an estrogen blocker. It does not relieve menopause symptoms such as hot flashes. Raloxifene belongs to a class of drugs known as selective estrogen receptor modulators-SERMs. This medication should not be used before menopause. It should not be used to prevent heart disease. A second generation selective estrogen receptor modulator (SERM) used to prevent osteoporosis in postmenopausal women. It has estrogen agonist effects on bone and cholesterol metabolism but behaves as a complete estrogen antagonist on mammary gland and uterine tissue.

In 2023, this provider wrote 109 Medicare prescriptions for Raloxifene Hcl, about 5.2 times the volume of the typical Illinois prescriber of this medication (21). Medicare paid an average of $75.93 per fill, versus $97.08 statewide.

How often this provider prescribes it

This provider
109
IL average
21.0

This provider prescribes this medication more often than the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$75.93
IL average
$97.08

This provider's average cost per fill is below the IL average for this medication.

309
30-Day Fills
standardized to 30-day supplies
9,250
Days of Medication
total across all patients in 2023

About Letrozole: This medication is used to treat certain types of breast cancer (such as hormone-receptor-positive breast cancer) in women after menopause. Show more ▾

Letrozole is also used to help prevent the cancer from returning. Some breast cancers are made to grow faster by a natural hormone called estrogen. Letrozole decreases the amount of estrogen the body makes and helps to slow or reverse the growth of these breast cancers. A triazole and benzonitrile derivative that is a selective non-steroidal aromatase inhibitor, similar to ANASTROZOLE. It is used in the treatment of metastatic or locally advanced breast cancer in postmenopausal women.

In 2023, this provider wrote 98 Medicare prescriptions for Letrozole, about 1.8 times the volume of the typical Illinois prescriber of this medication (54). Medicare paid an average of $43.96 per fill, versus $28.69 statewide.

How often this provider prescribes it

This provider
98
IL average
54.0

This provider prescribes this medication more often than the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$43.96
IL average
$28.69

Gross Part D cost per fill; not the patient's out-of-pocket price.

276
30-Day Fills
standardized to 30-day supplies
8,280
Days of Medication
total across all patients in 2023

About Anastrozole: Anastrozole is used to treat breast cancer in women after menopause. Show more ▾

Some breast cancers are made to grow faster by a natural hormone called estrogen. Anastrozole decreases the amount of estrogen the body makes and helps to slow or reverse the growth of these breast cancers. A nitrile and triazole derivative that acts as a selective nonsteroidal aromatase inhibitor. It is used in the treatment of ESTROGEN NUCLEAR RECEPTOR-positive breast cancer in postmenopausal women.

In 2023, this provider wrote 89 Medicare prescriptions for Anastrozole, about 1.2 times the volume of the typical Illinois prescriber of this medication (76). Medicare paid an average of $25.89 per fill, versus $26.77 statewide.

How often this provider prescribes it

This provider
89
IL average
76.0

This provider's prescribing volume for this medication is in line with the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$25.89
IL average
$26.77

This provider's average cost per fill is below the IL average for this medication.

233
30-Day Fills
standardized to 30-day supplies
6,990
Days of Medication
total across all patients in 2023

About Eliquis: Apixaban is used to prevent serious blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip/knee replacement surgery. Show more ▾

With atrial fibrillation, part of the heart does not beat the way it should. This can lead to blood clots forming, which can travel to other parts of your body (such as the lungs or legs) or increase your risk for stroke. In the United States, apixaban is also approved to treat certain types of blood clots (deep vein thrombosis-DVT, pulmonary embolus-PE) and to prevent them from forming again. Apixaban is an anticoagulant that works by blocking certain clotting proteins in your blood.

In 2023, this provider wrote 60 Medicare prescriptions for Eliquis, about 73% of the volume of the typical Illinois prescriber of this medication (82). Medicare paid an average of $944.69 per fill, versus $799.19 statewide.

How often this provider prescribes it

This provider
60
IL average
82.0

This provider prescribes this medication less often than the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$944.69
IL average
$799.19

Gross Part D cost per fill; not the patient's out-of-pocket price.

98
30-Day Fills
standardized to 30-day supplies
2,934
Days of Medication
total across all patients in 2023

About Prochlorperazine Maleate: This medication is used to treat severe nausea and vomiting from certain causes (for example, after surgery or cancer treatment). Show more ▾

Prochlorperazine belongs to a class of drugs known as phenothiazines. This medication is not recommended for use in children younger than 2 years or in children going through surgery. A phenothiazine antipsychotic used principally in the treatment of NAUSEA; VOMITING; and VERTIGO. It is more likely than CHLORPROMAZINE to cause EXTRAPYRAMIDAL DISORDERS. (From Martindale, The Extra Pharmacopoeia, 30th ed, p612)

In 2023, this provider wrote 44 Medicare prescriptions for Prochlorperazine Maleate, about 1.4 times the volume of the typical Illinois prescriber of this medication (32). Medicare paid an average of $11.70 per fill, versus $16.17 statewide.

How often this provider prescribes it

This provider
44
IL average
32.0

This provider prescribes this medication more often than the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$11.70
IL average
$16.17

This provider's average cost per fill is below the IL average for this medication.

44
30-Day Fills
standardized to 30-day supplies
317
Days of Medication
total across all patients in 2023

About Exemestane: This medication is used to treat certain types of breast cancer (such as hormone-receptor-positive breast cancer) in women after menopause. Show more ▾

Exemestane is also used to help prevent the cancer from returning. Some breast cancers are made to grow faster by a natural hormone called estrogen. Exemestane decreases the amount of estrogen the body makes and helps to slow or reverse the growth of these breast cancers. Exemestane is usually not used in women of childbearing age.

In 2023, this provider wrote 23 Medicare prescriptions for Exemestane, about 77% of the volume of the typical Illinois prescriber of this medication (30). Medicare paid an average of $385.04 per fill, versus $285.17 statewide.

How often this provider prescribes it

This provider
23
IL average
30.0

This provider's prescribing volume for this medication is in line with the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$385.04
IL average
$285.17

Gross Part D cost per fill; not the patient's out-of-pocket price.

67
30-Day Fills
standardized to 30-day supplies
2,010
Days of Medication
total across all patients in 2023

About Hydroxyurea: This medication is used by people with sickle cell anemia to reduce the number of painful crises caused by the disease and to reduce the need for blood transfusions. Show more ▾

Some brands are also used to treat certain types of cancer (such as chronic myelogenous leukemia, squamous cell carcinomas). An antineoplastic agent that inhibits DNA synthesis through the inhibition of ribonucleoside diphosphate reductase.

In 2023, this provider wrote 20 Medicare prescriptions for Hydroxyurea, about half the volume of the typical Illinois prescriber of this medication (34). Medicare paid an average of $32.34 per fill, versus $34.20 statewide.

How often this provider prescribes it

This provider
20
IL average
34.0

This provider prescribes this medication less often than the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$32.34
IL average
$34.20

This provider's average cost per fill is below the IL average for this medication.

55.2
30-Day Fills
standardized to 30-day supplies
1,656
Days of Medication
total across all patients in 2023

About Dexamethasone: Dexamethasone is used to treat conditions such as arthritis, blood/hormone disorders, allergic reactions, skin diseases, eye problems, breathing problems, bowel disorders, cancer, and immune system disorders. Show more ▾

It is also used as a test for an adrenal gland disorder (Cushing's syndrome). Dexamethasone belongs to a class of drugs known as corticosteroids. It decreases your immune system's response to various diseases to reduce symptoms such as swelling and allergic-type reactions. An anti-inflammatory 9-fluoro-glucocorticoid.

In 2023, this provider wrote 19 Medicare prescriptions for Dexamethasone, about 61% of the volume of the typical Illinois prescriber of this medication (31). Medicare paid an average of $35.85 per fill, versus $16.03 statewide.

How often this provider prescribes it

This provider
19
IL average
31.0

This provider prescribes this medication less often than the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$35.85
IL average
$16.03

Gross Part D cost per fill; not the patient's out-of-pocket price.

19
30-Day Fills
standardized to 30-day supplies
303
Days of Medication
total across all patients in 2023

About Xarelto: Rivaroxaban is used to prevent blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip or knee replacement surgery. Show more ▾

It is also used to prevent blood clots from forming in high-risk patients with limited mobility during their hospital stay and after discharge. In addition, rivaroxaban is used to treat blood clots (such as in deep vein thrombosis-DVT or pulmonary embolus-PE) and to prevent the blood clots from forming again. Rivaroxaban may be used in children to prevent blood clots from forming after a certain heart surgery (Fontan procedure). Rivaroxaban is an anticoagulant that works by blocking certain clotting proteins in your blood. A morpholine and thiophene derivative that functions as a FACTOR XA INHIBITOR and is used in the treatment and prevention of DEEP-VEIN THROMBOSIS and PULMONARY EMBOLISM. It is also used for the prevention of STROKE and systemic embolization in patients with non-valvular ATRIAL FIBRILLATION, and for the prevention of atherothrombotic events in patients after an ACUTE CORONARY SYNDROME.

In 2023, this provider wrote 17 Medicare prescriptions for Xarelto, about a third of the volume of the typical Illinois prescriber of this medication (46). Medicare paid an average of $1,147.41 per fill, versus $890.91 statewide.

How often this provider prescribes it

This provider
17
IL average
46.0

This provider prescribes this medication less often than the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$1,147.41
IL average
$890.91

Gross Part D cost per fill; not the patient's out-of-pocket price.

35.5
30-Day Fills
standardized to 30-day supplies
1,020
Days of Medication
total across all patients in 2023

About Ondansetron Odt: This medication is used alone or with other medications to prevent nausea and vomiting caused by cancer drug treatment (chemotherapy) and radiation therapy. Show more ▾

It is also used to prevent and treat nausea and vomiting after surgery. Ondansetron works by blocking one of the body's natural substances (serotonin) that causes vomiting. A competitive serotonin type 3 receptor antagonist. It is effective in the treatment of nausea and vomiting caused by cytotoxic chemotherapy drugs, including cisplatin, and has reported anxiolytic and neuroleptic properties.

In 2023, this provider wrote 14 Medicare prescriptions for Ondansetron Odt, about 67% of the volume of the typical Illinois prescriber of this medication (21). Medicare paid an average of $16.35 per fill, versus $19.60 statewide.

How often this provider prescribes it

This provider
14
IL average
21.0

This provider prescribes this medication less often than the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$16.35
IL average
$19.60

This provider's average cost per fill is below the IL average for this medication.

14
30-Day Fills
standardized to 30-day supplies
146
Days of Medication
total across all patients in 2023

About Imbruvica: This medication is used to treat certain cancers (such as mantle cell or marginal zone lymphoma, chronic lymphocytic leukemia/small lymphocytic lymphoma, Waldenstrom's macroglobulinemia). Show more ▾

Ibrutinib belongs to a class of drugs known as kinase inhibitors. It works by slowing or stopping the growth of cancer cells. Ibrutinib is also used to treat a certain problem that may occur after a stem cell transplant (chronic graft versus host disease). It works by weakening your body's defense system (immune system).

In 2023, this provider wrote 12 Medicare prescriptions for Imbruvica, about a third of the volume of the typical Illinois prescriber of this medication (31). Medicare paid an average of $16,906.36 per fill, versus $15,388.97 statewide.

How often this provider prescribes it

This provider
12
IL average
31.0

This provider prescribes this medication less often than the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$16,906.36
IL average
$15,388.97

Gross Part D cost per fill; not the patient's out-of-pocket price.

12
30-Day Fills
standardized to 30-day supplies
336
Days of Medication
total across all patients in 2023

About Promacta: This medication is used to treat low platelet levels in people who have a certain blood disorder called chronic immune (idiopathic) thrombocytopenia purpura (ITP) or who have chronic hepatitis C. Show more ▾

It may also be used to treat people with a certain blood disorder (aplastic anemia). Platelets are a type of blood cell needed to form blood clots and prevent bleeding. Eltrombopag decreases your risk of bleeding by increasing the number of platelets. Eltrombopag acts like a certain natural substance (thrombopoietin) that causes the body to produce platelets.

In 2023, this provider wrote 12 Medicare prescriptions for Promacta, about 75% of the volume of the typical Illinois prescriber of this medication (16). Medicare paid an average of $7,993.77 per fill, versus $11,992.53 statewide.

How often this provider prescribes it

This provider
12
IL average
16.0

This provider's prescribing volume for this medication is in line with the average IL prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$7,993.77
IL average
$11,992.53

This provider's average cost per fill is below the IL average for this medication.

12
30-Day Fills
standardized to 30-day supplies
360
Days of Medication
total across all patients in 2023
No medications match the current filters.
= the 5 medications this provider prescribes most. More than typical Typical Less than typical= prescription volume vs the average IL prescriber of the same medication; volume reflects practice size as well as clinical preference.Green cost= below the IL average cost per fill.

About this data. The prescription history for JOHN D AYERS MD is compiled from the Centers for Medicare & Medicaid Services (CMS) Medicare Part D Prescriber Public Use File for calendar year 2023, the most recent federal release. Figures cover prescriptions filled for Medicare Part D beneficiaries only; prescriptions under private insurance, Medicaid, or self-pay plans are not included. Because prescribing decisions are generally consistent across coverage types, this record offers a useful view of the overall Hematology & Oncology prescribing approach at this Warrenville, IL practice.

Reading the costs. Drug costs are gross amounts paid to pharmacies under Part D, including both plan and beneficiary payments. They are not the price a patient pays at the pharmacy counter. Medications with fewer than 11 claims are excluded from the federal source data, and state comparisons use the average volume among IL prescribers of the same medication. Always confirm current medications and costs directly with the provider and your plan.