Douglas Callahan, D.O.
NPI 1265540355 · Family Medicine Physician · St George, UT
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Callahan, D.O. is a Family Medicine Physician provider in St George, UT (NPI 1265540355).
Provider details
- NPI number
- 1265540355
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 5335922-1204 (UT)
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
7,202 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 | 1,447 | $86 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 902 | $7 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 725 | $122 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 692 | $123 |
| Advance Care Planning, First 30 Minutes99497 | 626 | $78 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 191 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 697 | 200 |
| Levothyroxine Sodium | 589 | 148 |
| Rsvpref3 Antigen/As01e/Pfbrand: Arexvy | 508 | 508 |
| Varicella-Zoster Ge/As01b/Pfbrand: Shingrix | 462 | 347 |
| Omeprazole | 456 | 109 |
| Losartan Potassium | 456 | 117 |
| Atorvastatin Calcium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,496 across 90 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
- 2006-08-28
- Last updated
- 2013-01-08
Frequently asked questions
- What is Douglas Callahan's NPI number?
- Douglas Callahan's National Provider Identifier (NPI) is 1265540355, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Callahan's specialty?
- Douglas Callahan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Callahan located?
- Douglas Callahan's practice location on file with NPPES is 1240 E 100 S, St George, UT 84790-3001.
- What is Douglas Callahan's phone number?
- The practice phone number listed in the NPPES registry for Douglas Callahan is (435) 656-5323.
- Does Douglas Callahan accept Medicare?
- Douglas Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Callahan's NPI active?
- Yes — Douglas Callahan's NPI (1265540355) is active in the NPPES registry as of the last update on 2013-01-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.