Mathieu C. Castonguay, MD
Clinical Pathology/Laboratory Medicine Physician · Rochester, MN
Mathieu C. Castonguay, MD is a clinical pathology/laboratory medicine physician with a practice address in Rochester, Minnesota, and NPI 1023397361, issued on Aug 4, 2011. Check the license (Minnesota 54371, as entered in NPPES) on the Minnesota Board of Medical Practice; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mathieu C. Castonguay
- Credential
- MD
- Primary taxonomy
- Clinical Pathology/Laboratory Medicine Physician 207ZP0105X
- License number
- 54371 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
- Aug 4, 2011
- Record last updated
- Nov 17, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- ENROLLED MN
- Entity
- Type 1 · individual
Also registered at 200 1St St SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Timothy Aadland, M.D.Diagnostic Radiology Physician1780662783
- 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 Mathieu C. Castonguay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 54371Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Clinical Pathology/Laboratory Medicine Physician providers in Minnesota
There are 79 clinical pathology/laboratory medicine physician records in Minnesota. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other clinical pathology/laboratory medicine physician records in Minnesota
- Anu Abraham, MBBSRochester, MN1952898058
- Neil Anderson, MDRochester, MN1265675094
- Nathanael BaileyRochester, MN1003013814
- John Black, M.D.Rochester, MN1790762862
- Stephen BolognaSt Cloud, MN1053383026
- Francois Cady, MDRochester, MN1962423038
- Bhavini Carns, M.D.Mankato, MN1811180763
- James Casey, M.D.Rochester, MN1295091700
- Sing Yun Chang, MDRochester, MN1275811614
- Ying-Hsia Chu, M.D.Rochester, MN1023493442
Common questions
What is Mathieu C. Castonguay, MD's NPI number?
Mathieu C. Castonguay, MD's National Provider Identifier (NPI) is 1023397361, issued on Aug 4, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Mathieu C. Castonguay, MD 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 Mathieu C. Castonguay, MD's license?
NPPES lists Minnesota license number 54371, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.