Thomas Eldon Callahan, D.O.
Pediatrics Physician · Dubuque, IA
Thomas Eldon Callahan, D.O. is a pediatrics physician with a practice address in Dubuque, Iowa, and NPI 1528262136, issued on Jun 14, 2007. Check the license (Iowa 4069, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Thomas Eldon Callahan
- Credential
- D.O.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 4069 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1500 Associates Dr, Dubuque, IA 52002
- Phone
- (563) 584-4440
- Enumerated
- Jun 14, 2007
- Record last updated
- Jul 6, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (563) 584-4427
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 502 in Iowa → Look up another NPI →
Also registered at 1500 Associates Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Edward Alt, MDObstetrics & Gynecology Physician1548432727
- Matthew Arensdorff, O.D.Optometrist1255644621
- Daniel Armstrong, PHYSICIAN ASSISTANTMedical Physician Assistant1699909028
- Jeffrey Artioli, CRNACertified Registered Nurse Anesthetist1558006411
- William Auer, ODOptometrist1598334971
- Kent Baumann, M.D.Ophthalmology Physician1316999725
Verify Thomas Eldon Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 4069Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average pediatrics physician in 2024
23 Medicare Part D claims, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Guanfacine Hcl14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Thomas Eldon Callahan among 502 pediatrics physician records in Iowa
Thomas Eldon Callahan, D.O. is one of 502 pediatrics physician records with a practice address in Iowa. 25% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 55% newer
- In a Medicare fileYes · 25% of these records are
- In the CMS Doctors and Clinicians fileNo · 10% of these records are
- Record last updated2010 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 pediatrics physician records list a practice address in Dubuque
They are 17 of the 1,468 NPPES records with a practice address in Dubuque, and 502 pediatrics physician records in Iowa.
All 502 in Iowa → Every provider in Dubuque → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Bethann Bonner, M.D.Dubuque, IA 520021811946320
- Mitchell Edwards, MDDubuque, IA 520021063036804
- Donald Reyerson, M.D.Dubuque, IA 520021346294634
- John Callahan, M.D.Dubuque, IA 520011851704480
- Keevin Franzen, M.D.Dubuque, IA 520011689653701
- Ankura Kadakia, DODubuque, IA 520011235583956
- David Kemp, M.D.Dubuque, IA 520011992784540
- David Kragenbrink, MDDubuque, IA 520011154316800
Common questions
What is Thomas Eldon Callahan, D.O.'s NPI number?
Thomas Eldon Callahan, D.O.'s National Provider Identifier (NPI) is 1528262136, issued on Jun 14, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Eldon Callahan, D.O. located?
The NPPES record lists a practice address at 1500 Associates Dr, Dubuque, IA, 52002. Phone: (563) 584-4440. Providers update this record themselves, so call before visiting.
How can I verify Thomas Eldon Callahan, D.O.'s license?
NPPES lists Iowa license number 4069, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Eldon Callahan, D.O. prescribe under Medicare Part D?
In 2024, Thomas Eldon Callahan, D.O. had 23 Medicare Part D claims; the average among pediatrics physician prescribers was 375. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.