Robert Mccallum, MD
NPI 1134264427 · Specialist · Tucson, AZ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Mccallum, MD is a Specialist provider in Tucson, AZ (NPI 1134264427).
Provider details
- NPI number
- 1134264427
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 30996 (AZ)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
809 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) |
|---|---|---|
| Moderate Sedation Services Provided By the Same Physician Or Other Qualified Health Care Professional Performing a Gastrointestinal Endoscopic Service That Sedation Supports, Requiring the Presence of an Independent Trained Observer to Assist in the MonitoG0500 | 294 | $5 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 108 | $165 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 88 | $246 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 68 | $103 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 58 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 259 | 252 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 210 | 210 |
| Omeprazole | 194 | 57 |
| Famotidine | 171 | 56 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 138 | 135 |
| Pantoprazole Sodium | 71 | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,783 across 92 records (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
- 2007-02-21
- Last updated
- 2024-02-15
Frequently asked questions
- What is Robert Mccallum's NPI number?
- Robert Mccallum's National Provider Identifier (NPI) is 1134264427, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Mccallum's specialty?
- Robert Mccallum is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Robert Mccallum located?
- Robert Mccallum's practice location on file with NPPES is 3040 N. Swan Rd Ste B, Tucson, AZ 85712-1206.
- What is Robert Mccallum's phone number?
- The practice phone number listed in the NPPES registry for Robert Mccallum is (520) 327-3454.
- Does Robert Mccallum accept Medicare?
- Robert Mccallum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Mccallum's NPI active?
- Yes — Robert Mccallum's NPI (1134264427) is active in the NPPES registry as of the last update on 2024-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.