Daniel L. Hamilos, M.D.
Allergy & Immunology Physician · Mason City, IA
Daniel L. Hamilos, M.D. is an allergy & immunology physician with a practice address in Mason City, Iowa, and NPI 1558347047, issued on Dec 16, 2005. Check the license (Iowa 52071, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Daniel L. Hamilos
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License numbers
- 52071 IA
219164 MA
Self-reported in NPPES; status is on the state search - Practice location
- 250 S Crescent Dr, Mason City, IA 50401
- Phone
- (641) 494-5380
- Enumerated
- Dec 16, 2005
- Record last updated
- Oct 23, 2023
- Medicare enrollment
- Enrolled (PECOS I20231031000331); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1979
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 33 in Iowa → Look up another NPI →
Also registered at 250 S Crescent Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christopher Adams, M.D.Urology Physician1336301563
- Andrea Anderson, PMHNPPsychiatric/Mental Health Nurse Practitioner1760065023
- Byron Beasley, MDCardiovascular Disease Physician1053398180
- Donald Beitzel, P.A.Physician Assistant1518939982
- Gregory Blank, PAPhysician Assistant1831161736
- Chad Boyer, PA-CPhysician Assistant1265638829
Verify Daniel L. Hamilos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 52071Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
318 Medicare Part D claims for 85 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Azelastine Hcl65 claims
- Montelukast Sodium44 claims
- Ipratropium Bromide26 claims
- Triamcinolone Acetonide23 claims
- Dupixent Syringe12 claims
- Tacrolimus12 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.
Industry payments in 2024: $59.68
3 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme Corporation. The 2,496 providers of this specialty with any payment received $8,321.81 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- North Iowa Mercy ClinicsMason City, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel L. Hamilos among 33 allergy & immunology physician records in Iowa
Daniel L. Hamilos, M.D. is one of 33 allergy & immunology physician records with a practice address in Iowa. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 70% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1979 · median 2008 among the 20 with a school on file
- Record last updated2023 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Iowa
There are 33 allergy & immunology physician records in Iowa.
All 33 in Iowa → Every provider in Mason City → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Javen Wunschel, D.O.Mason City, IA 504011285049775
- Whitney Molis, M.D.Des Moines, IA 503091396724878
- James Wille, MDDes Moines, IA 503091578590741
- Francisco Peralta, MDFort Dodge, IA 505011033181359
- Ravinder Agarwal, M.D.West Des Moines, IA 502661477538007
- Ahmad Al-Shash, M.D.West Des Moines, IA 502661881607786
- Vuong Nayima, DOWest Des Moines, IA 502661174817134
- Jennifer Petts, D.O.West Des Moines, IA 502661144455502
Common questions
What is Daniel L. Hamilos, M.D.'s NPI number?
Daniel L. Hamilos, M.D.'s National Provider Identifier (NPI) is 1558347047, issued on Dec 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Daniel L. Hamilos, M.D. located?
The NPPES record lists a practice address at 250 S Crescent Dr, Mason City, IA, 50401. Phone: (641) 494-5380. Providers update this record themselves, so call before visiting.
How can I verify Daniel L. Hamilos, M.D.'s license?
NPPES lists Iowa license number 52071, 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 Daniel L. Hamilos, M.D. prescribe under Medicare Part D?
In 2024, Daniel L. Hamilos, M.D. had 318 Medicare Part D claims for 85 beneficiaries; the average among allergy & immunology physician prescribers was 741. 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.