ANDREW MA MD
Prescription History 1528299708
Internal Medicine - Infectious Disease in Thousand Oaks, CA
What does Dr. Ma prescribe?
In 2024, Dr. Ma wrote 347 Medicare prescriptions for 18 medications. The most prescribed was Azithromycin, with 32 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. Ma prescribes.
Medications 18 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 California prescribers.
What it is used for
Azithromycin is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Ma wrote 32 prescriptions for Azithromycin, about 84% as often as the typical California prescriber of it (38). Medicare paid $27.41 per fill, versus $4.49 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
Ceftriaxone is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Ma wrote 32 prescriptions for Ceftriaxone, about 1.2 times as often as the typical California prescriber of it (26). Medicare paid $201.37 per fill, versus $86.07 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
Ertapenem is used to prevent and treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Ma wrote 31 prescriptions for Ertapenem, about 1.3 times as often as the typical California prescriber of it (24). Medicare paid $565.72 per fill, versus $370.74 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
Albuterol (also known as salbutamol) is used to prevent and treat wheezing and shortness of breath caused by breathing problems (such as asthma, chronic obstructive pulmonary disease).
Compared with California prescribers
Dr. Ma wrote 29 prescriptions for Albuterol Sulfate Hfa, about half as often as the typical California prescriber of it (58). Medicare paid $15.99 per fill, versus $28.70 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
Ethambutol is used with other medications to treat tuberculosis (TB).
Compared with California prescribers
Dr. Ma wrote 25 prescriptions for Ethambutol Hcl, about as often as the typical California prescriber of it (23). Medicare paid $30.70 per fill, versus $45.81 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 wide variety of bacterial infections.
Compared with California prescribers
Dr. Ma wrote 23 prescriptions for Cephalexin, about 77% as often as the typical California prescriber of it (30). Medicare paid $20.28 per fill, versus $7.62 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
Vancomycin is used to treat a certain intestinal condition (colitis) that may rarely happen after treatment with antibiotics.
Compared with California prescribers
Dr. Ma wrote 23 prescriptions for Vancomycin Hcl, about as often as the typical California prescriber of it (23). Medicare paid $144.26 per fill, versus $137.30 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
Methenamine is used to prevent or control returning urinary tract infections caused by certain bacteria.
Compared with California prescribers
Dr. Ma wrote 21 prescriptions for Methenamine Hippurate, about half as often as the typical California prescriber of it (36). Medicare paid $53.36 per fill, versus $75.37 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 and treat tuberculosis and other bacterial infections.
Compared with California prescribers
Dr. Ma wrote 17 prescriptions for Rifampin, about 77% as often as the typical California prescriber of it (22). Medicare paid $46.82 per fill, versus $56.64 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
Amoxicillin/clavulanic acid is a combination penicillin-type antibiotic used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Ma wrote 16 prescriptions for Amoxicillin-Clavulanate Potass, about 62% as often as the typical California prescriber of it (26). Medicare paid $6.03 per fill, versus $9.18 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
Amoxicillin is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Ma wrote 15 prescriptions for Amoxicillin, about 39% as often as the typical California prescriber of it (38). Medicare paid $7.24 per fill, versus $4.15 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
Dolutegravir/rilpivirine is used to help control HIV infection.
Compared with California prescribers
Dr. Ma wrote 13 prescriptions for Juluca, about 38% as often as the typical California prescriber of it (34). Medicare paid $3,369.70 per fill, versus $4,066.60 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
Piperacillin/tazobactam is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Ma wrote 13 prescriptions for Piperacillin-Tazobactam, about 66% as often as the typical California prescriber of it (20). Medicare paid $271.83 per fill, versus $169.02 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
Maraviroc is used with other HIV medications to help control HIV infection.
Compared with California prescribers
Dr. Ma wrote 12 prescriptions for Maraviroc, about half as often as the typical California prescriber of it (28). Medicare paid $1,124.44 per fill, versus $1,191.55 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 product contains 3 drugs: abacavir, dolutegravir, and lamivudine.
Compared with California prescribers
Dr. Ma wrote 12 prescriptions for Triumeq, about 34% as often as the typical California prescriber of it (35). Medicare paid $3,767.00 per fill, versus $4,419.67 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
This combination product is used by itself to help control HIV infection.
Compared with California prescribers
Dr. Ma wrote 11 prescriptions for Biktarvy, about 14% as often as the typical California prescriber of it (77). Medicare paid $3,774.38 per fill, versus $4,498.22 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 an antibiotic used to treat serious bacterial infections.
Compared with California prescribers
Dr. Ma wrote 11 prescriptions for Daptomycin, about 41% as often as the typical California prescriber of it (27). Medicare paid $457.02 per fill, versus $664.71 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
Fluconazole is used to treat vaginal yeast infections.
Compared with California prescribers
Dr. Ma wrote 11 prescriptions for Fluconazole, about half as often as the typical California prescriber of it (21). Medicare paid $27.79 per fill, versus $17.16 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. Ma’s prescriptions
What does Dr. Ma prescribe most?
In 2024 Medicare Part D data, Dr. Ma's most prescribed medications were Azithromycin (32), Ceftriaxone (32) and Ertapenem (31).
How does Dr. Ma's prescribing compare with other California prescribers?
Of the 18 medications with a state comparison, Dr. Ma prescribes 1 more often than the typical California prescriber, 6 about as often and 11 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Ma 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 California 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.
