Bryon Callahan, M.D.
NPI 1659717734 · Emergency Medicine Physician · Houston, TX
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Bryon Callahan, M.D. is a Emergency Medicine Physician provider in Houston, TX (NPI 1659717734).
Provider details
- NPI number
- 1659717734
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 191711 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
314 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 172 | $178 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 121 | $8 |
| Critical Care, First 30-74 Minutes99291 | 21 | $215 |
Typical Medicare-allowed amounts for these services range $8–$215 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dicyclomine Hcl | 51 | 50 |
| Tizanidine Hcl | 34 | 33 |
| Ondansetronbrand: Ondansetron Odt | 33 | 33 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 28 | 28 |
| Levofloxacin | 22 | 22 |
| Sucralfate | 20 | 19 |
| Azithromycin | 20 | 19 |
| Meclizine Hcl |
Practice location
Mailing address
Additional practice locations (1)
- 1000 Blythe BlvdMeb 3Charlotte, NC 28203-5812Phone: (704) 355-2000
Registry dates
- Enumerated
- 2013-05-16
- Last updated
- 2024-09-13
- Certified
- 2024-09-13
Frequently asked questions
- What is Bryon Callahan's NPI number?
- Bryon Callahan's National Provider Identifier (NPI) is 1659717734, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bryon Callahan's specialty?
- Bryon Callahan is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Bryon Callahan located?
- Bryon Callahan's practice location on file with NPPES is 1635 North Loop W, Houston, TX 77008.
- What is Bryon Callahan's phone number?
- The practice phone number listed in the NPPES registry for Bryon Callahan is (713) 867-2000.
- Does Bryon Callahan accept Medicare?
- Bryon Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Bryon Callahan's NPI active?
- Yes — Bryon Callahan's NPI (1659717734) is active in the NPPES registry as of the last update on 2024-09-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.