DR. BARBARA J MACCOLLUM M.D.
Prescription History 1215925821
Internal Medicine - Gastroenterology in Phoenix, AZ
What does Dr. Maccollum prescribe?
In 2024, Dr. Maccollum wrote 1,106 Medicare prescriptions for 17 medications. The most prescribed was Pantoprazole Sodium, with 284 prescriptions for 94 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. Maccollum prescribes.
Medications 17 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
Pantoprazole is used to treat certain stomach and esophagus problems (such as acid reflux).
Compared with Arizona prescribers
Dr. Maccollum wrote 284 prescriptions for Pantoprazole Sodium, about 4.3 times as often as the typical Arizona prescriber of it (67). Medicare paid $14.61 per fill, versus $13.27 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
Famotidine is used to treat ulcers of the stomach and intestines and to prevent intestinal ulcers from coming back after they have healed.
Compared with Arizona prescribers
Dr. Maccollum wrote 260 prescriptions for Famotidine, about 5.8 times as often as the typical Arizona prescriber of it (45). Medicare paid $11.30 per fill, versus $16.40 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 Arizona prescribers
Dr. Maccollum wrote 123 prescriptions for Ondansetron Odt, about 4.8 times as often as the typical Arizona prescriber of it (26). Medicare paid $9.57 per fill, versus $16.21 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
Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with Arizona prescribers
Dr. Maccollum wrote 74 prescriptions for Omeprazole, about as often as the typical Arizona prescriber of it (74). Medicare paid $10.63 per fill, versus $15.49 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
Colestipol is used along with a proper diet to lower cholesterol in the blood.
Compared with Arizona prescribers
Dr. Maccollum wrote 59 prescriptions for Colestipol Hcl, about 2.1 times as often as the typical Arizona prescriber of it (29). Medicare paid $65.24 per fill, versus $88.13 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. Maccollum wrote 53 prescriptions for Linzess, about 2 times as often as the typical Arizona prescriber of it (27). Medicare paid $852.34 per fill, versus $901.06 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 is used to clean out the intestines before a certain bowel exam procedure (colonoscopy).
Compared with Arizona prescribers
Dr. Maccollum wrote 48 prescriptions for Sutab, about as often as the typical Arizona prescriber of it (45). Medicare paid $161.45 per fill, versus $162.74 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 digestive enzymes to help break down and digest fats, starch, and proteins in food.
Compared with Arizona prescribers
Dr. Maccollum wrote 28 prescriptions for Creon, about 1.2 times as often as the typical Arizona prescriber of it (23). Medicare paid $3,296.40 per fill, versus $2,533.76 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
See also Warning section.
Compared with Arizona prescribers
Dr. Maccollum wrote 27 prescriptions for Trulance, about 1.2 times as often as the typical Arizona prescriber of it (23). Medicare paid $989.41 per fill, versus $766.99 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 and prevent ulcers in the intestines.
Compared with Arizona prescribers
Dr. Maccollum wrote 25 prescriptions for Sucralfate, about as often as the typical Arizona prescriber of it (24). Medicare paid $84.83 per fill, versus $49.77 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
This medication is used along with a proper diet and exercise to lower cholesterol in people with high levels of cholesterol in the blood.
Compared with Arizona prescribers
Dr. Maccollum wrote 24 prescriptions for Colesevelam Hcl, about as often as the typical Arizona prescriber of it (23). Medicare paid $98.95 per fill, versus $160.89 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
This medication is used to treat diarrhea.
Compared with Arizona prescribers
Dr. Maccollum wrote 24 prescriptions for Diphenoxylate-Atropine, about 1.3 times as often as the typical Arizona prescriber of it (19). Medicare paid $73.83 per fill, versus $25.34 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 bowel condition (Crohn's disease).
Compared with Arizona prescribers
Dr. Maccollum wrote 21 prescriptions for Budesonide Dr, about 89% as often as the typical Arizona prescriber of it (24). Medicare paid $69.23 per fill, versus $110.90 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
Dicyclomine is used to treat a certain type of intestinal problem called irritable bowel syndrome.
Compared with Arizona prescribers
Dr. Maccollum wrote 19 prescriptions for Dicyclomine Hcl, about 79% as often as the typical Arizona prescriber of it (24). Medicare paid $24.69 per fill, versus $21.28 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
This medication is used to treat certain bowel disorders (ulcerative colitis, Crohn's disease).
Compared with Arizona prescribers
Dr. Maccollum wrote 13 prescriptions for Entyvio, about 79% as often as the typical Arizona prescriber of it (16). Medicare paid $8,792.42 per fill, versus $8,624.11 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 bowel disease (ulcerative colitis).
Compared with Arizona prescribers
Dr. Maccollum wrote 13 prescriptions for Mesalamine Er, about half as often as the typical Arizona prescriber of it (28). Medicare paid $179.42 per fill, versus $244.31 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
Esomeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with Arizona prescribers
Dr. Maccollum wrote 11 prescriptions for Esomeprazole Magnesium, about half as often as the typical Arizona prescriber of it (22). Medicare paid $7.63 per fill, versus $45.40 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. Maccollum’s prescriptions
What does Dr. Maccollum prescribe most?
In 2024 Medicare Part D data, Dr. Maccollum's most prescribed medications were Pantoprazole Sodium (284), Famotidine (260) and Ondansetron Odt (123).
How does Dr. Maccollum's prescribing compare with other Arizona prescribers?
Of the 17 medications with a state comparison, Dr. Maccollum prescribes 6 more often than the typical Arizona prescriber, 9 about as often and 2 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Maccollum 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.
