Brian Callahan, MD
NPI 1982750576 · Neurological Surgery Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Callahan, MD is a Neurological Surgery Physician provider in Tucson, AZ (NPI 1982750576).
Provider details
- NPI number
- 1982750576
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 43234 (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
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
538 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 | 120 | $85 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 102 | $106 |
| X-Ray of Lower and Sacral Spine, 2-3 Views72100 | 41 | $36 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 28 | $161 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 28 | $165 |
| Ct Scan Head Or Brain Without Contrast70450 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 86 | 64 |
| Oxycodone Hcl | 76 | 38 |
| Gabapentin | 63 | 24 |
| Methocarbamol | 51 | 21 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 28 | 16 |
| Tizanidine Hcl | 19 | — |
| Pregabalin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$135 across 7 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
- 2007-01-26
- Last updated
- 2011-04-11
Frequently asked questions
- What is Brian Callahan's NPI number?
- Brian Callahan's National Provider Identifier (NPI) is 1982750576, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Callahan's specialty?
- Brian Callahan is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Callahan located?
- Brian Callahan's practice location on file with NPPES is 2450 E River Rd, Tucson, AZ 85718-6522.
- What is Brian Callahan's phone number?
- The practice phone number listed in the NPPES registry for Brian Callahan is (520) 795-7750.
- Does Brian Callahan accept Medicare?
- Brian Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Callahan's NPI active?
- Yes — Brian Callahan's NPI (1982750576) is active in the NPPES registry as of the last update on 2011-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.