Thomas Callahan, D.O.
NPI 1528262136 · Pediatrics Physician · Dubuque, IA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Callahan, D.O. is a Pediatrics Physician provider in Dubuque, IA (NPI 1528262136).
Provider details
- NPI number
- 1528262136
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4069 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Guanfacine Hcl | 14 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-14
- Last updated
- 2010-07-06
Frequently asked questions
- What is Thomas Callahan's NPI number?
- Thomas Callahan's National Provider Identifier (NPI) is 1528262136, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Callahan's specialty?
- Thomas Callahan is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Callahan located?
- Thomas Callahan's practice location on file with NPPES is 1500 Associates Dr, Dubuque, IA 52002-2201.
- What is Thomas Callahan's phone number?
- The practice phone number listed in the NPPES registry for Thomas Callahan is (563) 584-4440.
- Does Thomas Callahan accept Medicare?
- Thomas Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Callahan's NPI active?
- Yes — Thomas Callahan's NPI (1528262136) is active in the NPPES registry as of the last update on 2010-07-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.