Gregory Shoichi Ishimoto, M.D.
Family Medicine Physician · Manitowoc, WI
Gregory Shoichi Ishimoto, M.D. is a family medicine physician with a practice address in Manitowoc, Wisconsin, and NPI 1164681896, issued on Jun 6, 2008. Check the license (Wisconsin 56106-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Shoichi Ishimoto
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 56106-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 4100 Dewey St, Manitowoc, WI 54220
- Phone
- (805) 624-0615
- Enumerated
- Jun 6, 2008
- Record last updated
- Aug 29, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090828000369); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,765 in Wisconsin → Look up another NPI →
Also registered at 4100 Dewey St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Steven Chilinski, MDEmergency Medicine Physician1619116191
- Michal Chiu, MDPediatrics Physician1497739288
- Melissa Leist, ANP-CNurse Practitioner1891213401
- Lucas Mirera, DOFamily Medicine Physician1891439105
- Eric Peterson, MSN FNP-BCNurse Practitioner1790112050
Verify Gregory Shoichi Ishimoto in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 56106-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average family medicine physician in 2024
1,044 Medicare Part D claims for 262 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 71 claims were for opioids.
Most prescribed
- Ibuprofen106 claims
- Prednisone61 claims
- Gabapentin43 claims
- Lisinopril31 claims
- Tramadol Hcl31 claims
- Hydrocodone-Acetaminophen30 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.
2 hospitals and group practices
- American Specialty Physicians Group IncColusa, CA
- Orchard HospitalGridley, CA · Critical Access Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Gregory Shoichi Ishimoto among 3,765 family medicine physician records in Wisconsin
Gregory Shoichi Ishimoto, M.D. is one of 3,765 family medicine physician records with a practice address in Wisconsin. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 59% of them.
- NPI issued2008 · 59% of these records are older, 37% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2006 · median 2007 among the 2,347 with a school on file
- Record last updated2011 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 family medicine physician records list a practice address in Manitowoc
They are 18 of the 765 NPPES records with a practice address in Manitowoc, and 3,765 family medicine physician records in Wisconsin.
All 3,765 in Wisconsin → Every provider in Manitowoc → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jeffrey Allen, MDManitowoc, WI 542201962410514
- David Augustine, M.D.Manitowoc, WI 542201619083185
- Patricia Cantagallo, MDManitowoc, WI 542201326084484
- Michael Hoffman, MDManitowoc, WI 542201013080894
- Shelly Johnsen, MDManitowoc, WI 542201922016690
- Nicole MihalakakosManitowoc, WI 542201699920355
- Anna Mitura- Lewandowski, MDManitowoc, WI 542201801980602
- Bryan Mulheron, D.O.Manitowoc, WI 542201215163720
Common questions
What is Gregory Shoichi Ishimoto, M.D.'s NPI number?
Gregory Shoichi Ishimoto, M.D.'s National Provider Identifier (NPI) is 1164681896, issued on Jun 6, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Shoichi Ishimoto, M.D. located?
The NPPES record lists a practice address at 4100 Dewey St, Manitowoc, WI, 54220. Phone: (805) 624-0615. Providers update this record themselves, so call before visiting.
How can I verify Gregory Shoichi Ishimoto, M.D.'s license?
NPPES lists Wisconsin license number 56106-020, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Shoichi Ishimoto, M.D. prescribe under Medicare Part D?
In 2024, Gregory Shoichi Ishimoto, M.D. had 1,044 Medicare Part D claims for 262 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.