What is Barbara Maccollum's specialty?

Barbara Maccollum (NPI 1215925821) is a Medicare-billing provider whose primary specialty is Gastroenterology in Phoenix, AZ.

Where does Barbara Maccollum practice?

Barbara Maccollum practices in Phoenix, AZ, based on the location reported in the CMS Medicare provider datasets for NPI 1215925821.

How much does Medicare pay Barbara Maccollum?

Barbara Maccollum (NPI 1215925821) received approximately $103K in total Medicare Part B payments, serving 530 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1215925821

Barbara MaccollumM.D.

GastroenterologyPhoenix, AZI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

863

Unique beneficiaries

—

Total services

908

Distinct HCPCS

Medicare payment

$100K

Peer benchmark

Total Medicare services vs. 280 Gastroenterology providers in AZ — above median (cohort median 659).

PRESCRIBING · PART D · 2024

Total Rx claims

1,106

Beneficiaries

—

Total drug cost

$310K

Distinct drugs

Brand share

31.6%

Top prescribed drugs

Pantoprazole Sodium284 claims

Famotidine260 claims

Ondansetron123 claims

Omeprazole74 claims

Colestipol Hcl59 claims

QUALITY · MIPS · 2024

Final MIPS score

81.8

Quality

60.5

Cost

81.2

Improvement activities

40.0

Promoting interop.

97.0

Payment adjustment

0.28%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$23

Payment records

By payment type

Food and Beverage$23

Top paying entities

Food and Beverage$23

REFERRAL NETWORK

Where Barbara Maccollum's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 1 inbound referrers · 13 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Valerie Soler Certified Registered Nurse Anesthetist (CRNA) · Mesa, AZ	39	78

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Arizona Endoscopy Center, Llc Ambulatory Surgical Center · Phoenix, AZ	127	199
Sonora Quest Laboratories Llc Clinical Laboratory · Phoenix, AZ	78	196
Julie Adams Certified Registered Nurse Anesthetist (CRNA) · Fargo, ND	67	117
BANNER - UNIVERSITY MEDICAL CENTER PHOENIX	44	82
Lisa Cerilli Pathology · Phoenix, AZ	34	58
Jeffrey Henderson Pathology · Phoenix, AZ	29	43
Laboratory Corporation Of America Clinical Laboratory · Phoenix, AZ	27	80
Daniel Jondle Pathology · Phoenix, AZ	18	39
HORVATH, JANET	16	31
Elizabeth Westfall Diagnostic Radiology · Phoenix, AZ	15	32
DODGE, ANDREW	12	16
Valerie Soler Certified Registered Nurse Anesthetist (CRNA) · Mesa, AZ	12	22

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events