John B. Hagan, M.D.
Allergy & Immunology Physician · Rochester, MN
John B. Hagan, M.D. is an allergy & immunology physician with a practice address in Rochester, Minnesota, and NPI 1366429573, issued on Dec 29, 2005. Check the license (Minnesota 33534, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- John B. Hagan
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- 33534 MN
Self-reported in NPPES; status is on the state search - Practice location
- 200 1St St SW, Rochester, MN 55905
- Phone
- (507) 284-2511
- Enumerated
- Dec 29, 2005
- Record last updated
- Aug 14, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100301000965); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1989
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 85 in Minnesota → Look up another NPI →
Also registered at 200 1St St SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Christopher Aakre, MDInternal Medicine Physician1508151663
- Kathryn Aaro, P.T.Physical Therapist1619360666
- Danielle Aase, MDReproductive Endocrinology Physician1316524135
- Uzoamaka Abajue, PHARMDPharmacist1982335295
- Francisco Abarca Rendon, MDIndependent Medical Examiner Physician1790096246
Verify John B. Hagan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 33534Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
339 Medicare Part D claims for 79 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 52% of claims.
Most prescribed
- Montelukast Sodium49 claims
- Albuterol Sulfate Hfa33 claims
- Alvesco20 claims
- Breo Ellipta20 claims
- Azelastine Hcl19 claims
- Advair Hfa18 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.
Bills Medicare through one group practice
- Mayo ClinicRochester, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John B. Hagan among 85 allergy & immunology physician records in Minnesota
John B. Hagan, M.D. is one of 85 allergy & immunology physician records with a practice address in Minnesota. 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, 85% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1989 · median 2004 among the 56 with a school on file
- Record last updated2020 · 64% 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 Minnesota 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 Minnesota
There are 85 allergy & immunology physician records in Minnesota.
All 85 in Minnesota → Every provider in Rochester → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Joseph Butterfield, M.D.Rochester, MN 559051982681136
- Sergio Chiarella, M.D.Rochester, MN 559051295020550
- Rohit Divekar, M.D, PH.DRochester, MN 559051417123498
- Elina Jerschow, MDRochester, MN 559051922197235
- James Li, M.D.Rochester, MN 559051154300861
- Caitlin McNulty, MDRochester, MN 559051467895680
- Sydney O'Malley, M.D.Rochester, MN 559051851754626
- Miguel (michael) Park, M.D.Rochester, MN 559051619940483
Common questions
What is John B. Hagan, M.D.'s NPI number?
John B. Hagan, M.D.'s National Provider Identifier (NPI) is 1366429573, issued on Dec 29, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John B. Hagan, M.D. located?
The NPPES record lists a practice address at 200 1St St SW, Rochester, MN, 55905. Phone: (507) 284-2511. Providers update this record themselves, so call before visiting.
How can I verify John B. Hagan, M.D.'s license?
NPPES lists Minnesota license number 33534, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John B. Hagan, M.D. prescribe under Medicare Part D?
In 2024, John B. Hagan, M.D. had 339 Medicare Part D claims for 79 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.