Barbara Maccollum, M.D.
NPI 1215925821 · Gastroenterology Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Barbara Maccollum, M.D. is a Gastroenterology Physician provider in Phoenix, AZ (NPI 1215925821).
Provider details
- NPI number
- 1215925821
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 15579 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
908 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 179 | $88 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 138 | $239 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 116 | $93 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 107 | $142 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 95 | $122 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 284 | 94 |
| Famotidine | 260 | 87 |
| Ondansetronbrand: Ondansetron Odt | 123 | 102 |
| Omeprazole | 74 | 25 |
| Colestipol Hcl | 59 | 18 |
| Linaclotidebrand: Linzess | 53 | 11 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 48 | 46 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$39 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-07
- Last updated
- 2017-02-17
Frequently asked questions
- What is Barbara Maccollum's NPI number?
- Barbara Maccollum's National Provider Identifier (NPI) is 1215925821, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Barbara Maccollum's specialty?
- Barbara Maccollum is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Barbara Maccollum located?
- Barbara Maccollum's practice location on file with NPPES is 1300 N 12th St, Phoenix, AZ 85006-2848.
- What is Barbara Maccollum's phone number?
- The practice phone number listed in the NPPES registry for Barbara Maccollum is (602) 254-5321.
- Does Barbara Maccollum accept Medicare?
- Barbara Maccollum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Barbara Maccollum's NPI active?
- Yes — Barbara Maccollum's NPI (1215925821) is active in the NPPES registry as of the last update on 2017-02-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.