What is Robert Mccallum's specialty?

Robert Mccallum (NPI 1134264427) is a Medicare-billing provider whose primary specialty is Gastroenterology in Tucson, AZ.

Where does Robert Mccallum practice?

Robert Mccallum practices in Tucson, AZ, based on the location reported in the CMS Medicare provider datasets for NPI 1134264427.

How much does Medicare pay Robert Mccallum?

Robert Mccallum (NPI 1134264427) received approximately $74K in total Medicare Part B payments, serving 378 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1134264427

Robert MccallumMD

GastroenterologyTucson, AZI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

798

Unique beneficiaries

—

Total services

809

Distinct HCPCS

Medicare payment

$70K

Peer benchmark

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

PRESCRIBING · PART D · 2024

Total Rx claims

1,576

Beneficiaries

—

Total drug cost

$343K

Distinct drugs

Brand share

61.9%

Top prescribed drugs

Peg3350/Sod Sulf,bicarb,cl/Kcl259 claims

Sodium, Potassium,mag Sulfates210 claims

Omeprazole194 claims

Famotidine171 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl138 claims

QUALITY · MIPS · 2024

Final MIPS score

99.8

Quality

99.5

Cost

90.5

Improvement activities

40.0

Promoting interop.

0.0

Payment adjustment

1.04%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$3K

Payment records

128

By payment type

Food and Beverage$3K

Top paying entities

Food and Beverage$3K

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 030006

Hospital

REFERRAL NETWORK

Where Robert Mccallum'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). 5 inbound referrers · 7 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Tucson Gastroenterology Institute, Llc Ambulatory Surgical Center · Tucson, AZ	270	355
ORO VALLEY HOSPITAL LLC	38	70
BANNER - UNIVERSITY MEDICAL CENTER TUCSON CAMPUS LLC	23	78
Inform Diagnostics, Inc. Clinical Laboratory · Coppell, TX	23	26
NORTHWEST HOSPITAL LLC	13	21

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Inform Diagnostics, Inc. Clinical Laboratory · Coppell, TX	173	347
Tucson Gastroenterology Institute, Llc Ambulatory Surgical Center · Tucson, AZ	146	206
Sonora Quest Laboratories Llc Clinical Laboratory · Phoenix, AZ	44	116
Laboratory Corporation Of America Clinical Laboratory · Phoenix, AZ	34	57
ORO VALLEY HOSPITAL LLC	28	50
BANNER - UNIVERSITY MEDICAL CENTER TUCSON CAMPUS LLC	14	33
NORTHWEST HOSPITAL LLC	13	18

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