MS. KARLA L BIRKHOLZ MD
Prescription History 1386620821
Family Medicine in Glendale, AZ
What does Dr. Birkholz prescribe?
In 2024, Dr. Birkholz wrote 218 Medicare prescriptions for 10 medications. The most prescribed was Oxycodone Hcl, with 40 prescriptions.
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. Birkholz prescribes.
Medications 10 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 Arizona prescribers.
What it is used for
This medication is used to help relieve moderate to severe pain.
Compared with Arizona prescribers
Dr. Birkholz wrote 40 prescriptions for Oxycodone Hcl, about half as often as the typical Arizona prescriber of it (73). Medicare paid $34.62 per fill, versus $15.46 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
Progesterone is a type of hormone (progestin).
Compared with Arizona prescribers
Dr. Birkholz wrote 33 prescriptions for Progesterone, about as often as the typical Arizona prescriber of it (32). Medicare paid $46.71 per fill, versus $41.20 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
See also Warning section.
Compared with Arizona prescribers
Dr. Birkholz wrote 32 prescriptions for Tramadol Hcl, about 65% as often as the typical Arizona prescriber of it (49). Medicare paid $12.21 per fill, versus $7.86 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 a hormone.
Compared with Arizona prescribers
Dr. Birkholz wrote 29 prescriptions for Estradiol, about 77% as often as the typical Arizona prescriber of it (38). Medicare paid $8.88 per fill, versus $51.55 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
Cyclobenzaprine is used short-term to treat muscle spasms.
Compared with Arizona prescribers
Dr. Birkholz wrote 18 prescriptions for Cyclobenzaprine Hcl, about half as often as the typical Arizona prescriber of it (34). Medicare paid $7.28 per fill, versus $10.32 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 Arizona prescribers
Dr. Birkholz wrote 16 prescriptions for Eliquis, about 22% as often as the typical Arizona prescriber of it (73). Medicare paid $866.96 per fill, versus $1,048.21 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
Metformin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar.
Compared with Arizona prescribers
Dr. Birkholz wrote 14 prescriptions for Metformin Hcl Er, about 30% as often as the typical Arizona prescriber of it (46). Medicare paid $5.14 per fill, versus $9.94 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
Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes.
Compared with Arizona prescribers
Dr. Birkholz wrote 13 prescriptions for Losartan Potassium, about 11% as often as the typical Arizona prescriber of it (115). Medicare paid $7.56 per fill, versus $9.93 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
Hydrocodone is used to help relieve severe ongoing pain.
Compared with Arizona prescribers
Dr. Birkholz wrote 12 prescriptions for Hysingla Er, about 68% as often as the typical Arizona prescriber of it (18). Medicare paid $1,306.18 per fill, versus $636.49 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 alone or with other medications to treat high blood pressure (hypertension).
Compared with Arizona prescribers
Dr. Birkholz wrote 11 prescriptions for Clonidine, about half as often as the typical Arizona prescriber of it (20). Medicare paid $41.07 per fill, versus $134.18 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. Birkholz’s prescriptions
What does Dr. Birkholz prescribe most?
In 2024 Medicare Part D data, Dr. Birkholz's most prescribed medications were Oxycodone Hcl (40), Progesterone (33) and Tramadol Hcl (32).
How does Dr. Birkholz's prescribing compare with other Arizona prescribers?
Of the 10 medications with a state comparison, Dr. Birkholz prescribes 2 about as often than the typical Arizona prescriber and 8 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Birkholz 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 Arizona 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.
