DR. KATHERINE REBECCA EXTEN M.D.
Prescription History 1982996237
Internal Medicine - Hematology & Oncology in Mansfield, OH
What does Dr. Exten prescribe?
In 2024, Dr. Exten wrote 2,067 Medicare prescriptions for 41 medications. The most prescribed was Anastrozole, with 292 prescriptions for 75 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. Exten prescribes.
Medications 41 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 Ohio prescribers.
What it is used for
Anastrozole is used to treat breast cancer in women after menopause.
Compared with Ohio prescribers
Dr. Exten wrote 292 prescriptions for Anastrozole, about 3.9 times as often as the typical Ohio prescriber of it (75). Medicare paid $14.66 per fill, versus $17.45 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
Tamoxifen is used to treat breast cancer.
Compared with Ohio prescribers
Dr. Exten wrote 161 prescriptions for Tamoxifen Citrate, about 5 times as often as the typical Ohio prescriber of it (32). Medicare paid $25.12 per fill, versus $27.22 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 severe nausea and vomiting from certain causes (for example, after surgery or cancer treatment).
Compared with Ohio prescribers
Dr. Exten wrote 115 prescriptions for Prochlorperazine Maleate, about 3.6 times as often as the typical Ohio prescriber of it (32). Medicare paid $14.32 per fill, versus $16.14 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
Apixaban is used to prevent serious blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip/knee replacement surgery.
Compared with Ohio prescribers
Dr. Exten wrote 108 prescriptions for Eliquis, about as often as the typical Ohio prescriber of it (100). Medicare paid $668.11 per fill, versus $838.29 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 Ohio prescribers
Dr. Exten wrote 107 prescriptions for Gabapentin, about as often as the typical Ohio prescriber of it (104). Medicare paid $8.38 per fill, versus $14.20 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
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.
Compared with Ohio prescribers
Dr. Exten wrote 99 prescriptions for Dexamethasone, about 3 times as often as the typical Ohio prescriber of it (33). Medicare paid $14.15 per fill, versus $12.42 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
Levothyroxine is used to treat an underactive thyroid (hypothyroidism).
Compared with Ohio prescribers
Dr. Exten wrote 97 prescriptions for Levothyroxine Sodium, about half as often as the typical Ohio prescriber of it (173). Medicare paid $4.13 per fill, versus $9.60 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 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.
Compared with Ohio prescribers
Dr. Exten wrote 93 prescriptions for Hydroxyurea, about 2.5 times as often as the typical Ohio prescriber of it (37). Medicare paid $20.63 per fill, versus $19.94 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
Acyclovir is used to treat infections caused by certain types of viruses.
Compared with Ohio prescribers
Dr. Exten wrote 85 prescriptions for Acyclovir, about 3.3 times as often as the typical Ohio prescriber of it (26). Medicare paid $12.18 per fill, versus $16.76 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 with other medications to prevent nausea and vomiting caused by cancer drug treatment (chemotherapy) and radiation therapy.
Compared with Ohio prescribers
Dr. Exten wrote 80 prescriptions for Ondansetron Hcl, about 2.4 times as often as the typical Ohio prescriber of it (33). Medicare paid $24.48 per fill, versus $23.66 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 a mineral supplement used to treat or prevent low amounts of potassium in the blood.
Compared with Ohio prescribers
Dr. Exten wrote 74 prescriptions for Potassium Chloride, about as often as the typical Ohio prescriber of it (75). Medicare paid $12.82 per fill, versus $20.26 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
Lenalidomide is used to treat various types of cancers.
Compared with Ohio prescribers
Dr. Exten wrote 65 prescriptions for Lenalidomide, about 1.8 times as often as the typical Ohio prescriber of it (37). Medicare paid $13,201.84 per fill, versus $13,328.62 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 Ohio prescribers
Dr. Exten wrote 56 prescriptions for Loperamide, about 2.4 times as often as the typical Ohio prescriber of it (23). Medicare paid $16.74 per fill, versus $23.53 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
Lenalidomide is used to treat various types of cancers.
Compared with Ohio prescribers
Dr. Exten wrote 54 prescriptions for Revlimid, about 1.5 times as often as the typical Ohio prescriber of it (35). Medicare paid $17,277.05 per fill, versus $17,361.75 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
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 Ohio prescribers
Dr. Exten wrote 47 prescriptions for Prednisone, about as often as the typical Ohio prescriber of it (52). Medicare paid $3.70 per fill, versus $3.48 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 combination medication is used to help relieve moderate to severe pain.
Compared with Ohio prescribers
Dr. Exten wrote 43 prescriptions for Oxycodone-Acetaminophen, about half as often as the typical Ohio prescriber of it (75). Medicare paid $25.77 per fill, versus $20.65 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 to treat prostate cancer.
Compared with Ohio prescribers
Dr. Exten wrote 41 prescriptions for Abiraterone Acetate, about 79% as often as the typical Ohio prescriber of it (52). Medicare paid $2,923.13 per fill, versus $1,810.55 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 types of cancer (such as mantle cell lymphoma, small lymphocytic lymphoma - SLL, chronic lymphocytic leukemia - CLL).
Compared with Ohio prescribers
Dr. Exten wrote 32 prescriptions for Calquence, about as often as the typical Ohio prescriber of it (35). Medicare paid $15,378.34 per fill, versus $14,042.15 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 a combination of two antibiotics: sulfamethoxazole and trimethoprim.
Compared with Ohio prescribers
Dr. Exten wrote 32 prescriptions for Sulfamethoxazole-Trimethoprim, about as often as the typical Ohio prescriber of it (28). Medicare paid $2.73 per fill, versus $5.02 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 types of cancer (such as acute lymphoblastic leukemia, chronic myeloid leukemia, gastrointestinal stromal tumors, and myelodysplastic/myeloproliferative diseases).
Compared with Ohio prescribers
Dr. Exten wrote 28 prescriptions for Imatinib Mesylate, about 1.2 times as often as the typical Ohio prescriber of it (23). Medicare paid $443.44 per fill, versus $1,315.71 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 Ohio prescribers
Dr. Exten wrote 23 prescriptions for Duloxetine Hcl, about 39% as often as the typical Ohio prescriber of it (58). Medicare paid $34.97 per fill, versus $23.49 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 types of breast cancer (such as hormone-receptor-positive breast cancer) in women after menopause.
Compared with Ohio prescribers
Dr. Exten wrote 23 prescriptions for Exemestane, about 79% as often as the typical Ohio prescriber of it (29). Medicare paid $68.28 per fill, versus $139.42 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 types of breast cancer (such as hormone-receptor-positive breast cancer) in women after menopause.
Compared with Ohio prescribers
Dr. Exten wrote 23 prescriptions for Letrozole, about half as often as the typical Ohio prescriber of it (48). Medicare paid $31.94 per fill, versus $19.84 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 cancers (such as stomach, colon/rectum).
Compared with Ohio prescribers
Dr. Exten wrote 22 prescriptions for Lonsurf, about 1.2 times as often as the typical Ohio prescriber of it (18). Medicare paid $7,081.08 per fill, versus $11,479.10 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 diarrhea.
Compared with Ohio prescribers
Dr. Exten wrote 21 prescriptions for Diphenoxylate-Atropine, about as often as the typical Ohio prescriber of it (20). Medicare paid $11.62 per fill, versus $25.79 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
Everolimus is used to treat various types of cancer (such as kidney, breast, pancreas, lung, stomach/intestinal cancers).
Compared with Ohio prescribers
Dr. Exten wrote 21 prescriptions for Everolimus, about 86% as often as the typical Ohio prescriber of it (24). Medicare paid $4,494.04 per fill, versus $3,220.83 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
This medication is used to treat certain mental/mood disorders (such as schizophrenia, bipolar disorder).
Compared with Ohio prescribers
Dr. Exten wrote 20 prescriptions for Olanzapine, about 38% as often as the typical Ohio prescriber of it (52). Medicare paid $13.65 per fill, versus $26.54 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 help reduce certain symptoms of menopause (such as hot flashes, night sweats).
Compared with Ohio prescribers
Dr. Exten wrote 20 prescriptions for Veozah, about 1.4 times as often as the typical Ohio prescriber of it (15). Medicare paid $713.82 per fill, versus $618.78 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 a mineral supplement used to treat or prevent low amounts of potassium in the blood.
Compared with Ohio prescribers
Dr. Exten wrote 19 prescriptions for Klor-Con M20, about 86% as often as the typical Ohio prescriber of it (22). Medicare paid $12.93 per fill, versus $19.58 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 help relieve moderate to severe pain.
Compared with Ohio prescribers
Dr. Exten wrote 19 prescriptions for Oxycodone Hcl, about 40% as often as the typical Ohio prescriber of it (48). Medicare paid $11.18 per fill, versus $13.41 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 a variety of skin conditions (such as eczema, dermatitis, allergies, rash).
Compared with Ohio prescribers
Dr. Exten wrote 17 prescriptions for Betamethasone Valerate, about 79% as often as the typical Ohio prescriber of it (21). Medicare paid $21.88 per fill, versus $24.92 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 a certain type of skin disorder (dermatitis herpetiformis).
Compared with Ohio prescribers
Dr. Exten wrote 16 prescriptions for Dapsone, about 90% as often as the typical Ohio prescriber of it (18). Medicare paid $39.65 per fill, versus $61.05 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 cancers (such as chronic lymphocytic leukemia/small lymphocytic lymphoma, Waldenstrom's macroglobulinemia).
Compared with Ohio prescribers
Dr. Exten wrote 14 prescriptions for Imbruvica, about half as often as the typical Ohio prescriber of it (32). Medicare paid $15,992.64 per fill, versus $15,691.86 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 help relieve severe ongoing pain (such as due to cancer).
Compared with Ohio prescribers
Dr. Exten wrote 14 prescriptions for Morphine Sulfate Er, about 32% as often as the typical Ohio prescriber of it (43). Medicare paid $11.20 per fill, versus $27.51 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
Regorafenib is used to treat cancer of the colon and rectum.
Compared with Ohio prescribers
Fewer than five Ohio prescribers wrote this medication, so there is no state comparison.
What it is used for
See also Warning section.
Compared with Ohio prescribers
Dr. Exten wrote 14 prescriptions for Tramadol Hcl, about 25% as often as the typical Ohio prescriber of it (56). Medicare paid $2.66 per fill, versus $7.12 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
Allopurinol is used to treat gout and certain types of kidney stones.
Compared with Ohio prescribers
Dr. Exten wrote 12 prescriptions for Allopurinol, about 22% as often as the typical Ohio prescriber of it (55). Medicare paid $3.09 per fill, versus $8.74 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 contains 2 amide-type local anesthetics, lidocaine and prilocaine.
Compared with Ohio prescribers
Dr. Exten wrote 12 prescriptions for Lidocaine-Prilocaine, about half as often as the typical Ohio prescriber of it (21). Medicare paid $12.14 per fill, versus $14.64 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 with other medications to prevent nausea and vomiting caused by cancer drug treatment (chemotherapy) and radiation therapy.
Compared with Ohio prescribers
Dr. Exten wrote 12 prescriptions for Ondansetron Odt, about half as often as the typical Ohio prescriber of it (25). Medicare paid $23.46 per fill, versus $16.78 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 certain types of cancer (chronic myeloid leukemia-CML, acute lymphoblastic leukemia-ALL).
Compared with Ohio prescribers
Dr. Exten wrote 11 prescriptions for Sprycel, about 64% as often as the typical Ohio prescriber of it (17). Medicare paid $17,846.91 per fill, versus $12,511.61 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 blood clots (such as in deep vein thrombosis-DVT or pulmonary embolus-PE) and/or to prevent new clots from forming in your body.
Compared with Ohio prescribers
Dr. Exten wrote 11 prescriptions for Warfarin Sodium, about 25% as often as the typical Ohio prescriber of it (44). Medicare paid $5.70 per fill, versus $8.53 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. Exten’s prescriptions
What does Dr. Exten prescribe most?
In 2024 Medicare Part D data, Dr. Exten's most prescribed medications were Anastrozole (292), Tamoxifen Citrate (161) and Prochlorperazine Maleate (115).
How does Dr. Exten's prescribing compare with other Ohio prescribers?
Of the 40 medications with a state comparison, Dr. Exten prescribes 11 more often than the typical Ohio prescriber, 15 about as often and 14 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Exten 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 Ohio 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.
