Hiroshi Kato, M.D.
Rheumatology Physician · Ann Arbor, MI
Hiroshi Kato, M.D. is a rheumatology physician with a practice address in Ann Arbor, Michigan, and NPI 1851538656, issued on Jan 15, 2009. Check the license (Michigan 4301508663, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Hiroshi Kato
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- 4301508663 MI
003898 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Phone
- (734) 936-4000
- Enumerated
- Jan 15, 2009
- Record last updated
- Apr 4, 2023
- Medicaid ID
- 03382487 NY
- Medicare enrollment
- Enrolled (PECOS I20230411001286); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 226 in Michigan → Look up another NPI →
Also registered at 1500 E Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ahmed Abdel-Latif, M.D.Interventional Cardiology Physician1518181239
Verify Hiroshi Kato in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301508663Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,921 Medicare Part D claims for 249 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 25 claims were for opioids.
Most prescribed
- Prednisone375 claims
- Hydroxychloroquine Sulfate358 claims
- Methotrexate231 claims
- Alendronate Sodium91 claims
- Methylprednisolone73 claims
- Mycophenolate Mofetil64 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
- Regents OF The University OF MichiganAnn Arbor, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hiroshi Kato among 226 rheumatology physician records in Michigan
Hiroshi Kato, M.D. is one of 226 rheumatology physician records with a practice address in Michigan. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 64% of them.
- NPI issued2009 · 64% of these records are older, 33% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2011 · median 2003 among the 156 with a school on file
- Record last updated2023 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Michigan
There are 226 rheumatology physician records in Michigan.
All 226 in Michigan → Every provider in Ann Arbor → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Daniel Clauw, MDAnn Arbor, MI 481091518042126
- Inocencio Cuesta, MDAnn Arbor, MI 481091992746820
- David Fox, MDAnn Arbor, MI 481091154406767
- Samardeep Gupta, M.D.Ann Arbor, MI 481091891712253
- Joseph Holoshitz, MDAnn Arbor, MI 481091508941113
- Mariana Kaplan, MDAnn Arbor, MI 481091235214842
- Puja Khanna, MDAnn Arbor, MI 481091396825071
- Timothy Laing, MDAnn Arbor, MI 481091396820908
Common questions
What is Hiroshi Kato, M.D.'s NPI number?
Hiroshi Kato, M.D.'s National Provider Identifier (NPI) is 1851538656, issued on Jan 15, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Hiroshi Kato, M.D. located?
The NPPES record lists a practice address at 1500 E Medical Center Dr, Ann Arbor, MI, 48109. Phone: (734) 936-4000. Providers update this record themselves, so call before visiting.
How can I verify Hiroshi Kato, M.D.'s license?
NPPES lists Michigan license number 4301508663, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Hiroshi Kato, M.D. prescribe under Medicare Part D?
In 2024, Hiroshi Kato, M.D. had 1,921 Medicare Part D claims for 249 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.