Randy C. Mathewson, M.D.
Internal Medicine Physician · Greendale, WI
Randy C. Mathewson, M.D. is an internal medicine physician with a practice address in Greendale, Wisconsin, and NPI 1477654002, issued on Sep 26, 2006. Check the license (Wisconsin 23146, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Randy C. Mathewson
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 23146 WI
Self-reported in NPPES; status is on the state search - Practice location
- 6601 Northway # D, Greendale, WI 53129
- Phone
- (414) 423-0555
- Enumerated
- Sep 26, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (414) 423-8268
- Medicaid ID
- 30436400 WI
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 6601 Northway # D
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Lubing, M.D.Internal Medicine Physician1669573283
Verify Randy C. Mathewson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 23146Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Randy C. Mathewson among 2,078 internal medicine physician records in Wisconsin
Randy C. Mathewson, M.D. is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileNo · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2007 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 internal medicine physician records list a practice address in Greendale
They are 4 of the 163 NPPES records with a practice address in Greendale, and 2,078 internal medicine physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,078 in Wisconsin → Every provider in Greendale → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mohsin Altaf, MDGreendale, WI 531291083235113
- Anil Garg, MDGreendale, WI 531291003994583
- John Lubing, M.D.Greendale, WI 531291669573283
- Mark Clemence, M.D.Hales Corners, WI 531301255324216
- Albert Dietz, MDGenoa City, WI 531281972267128
- Jeffrey Aldred, M.D.Franklin, WI 531321528051539
- Saleem Aman, MDFranklin, WI 531321487691556
- Ronald Cohen, M.D.Franklin, WI 531321982697942
Common questions
What is Randy C. Mathewson, M.D.'s NPI number?
Randy C. Mathewson, M.D.'s National Provider Identifier (NPI) is 1477654002, issued on Sep 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Randy C. Mathewson, M.D. located?
The NPPES record lists a practice address at 6601 Northway # D, Greendale, WI, 53129. Phone: (414) 423-0555. Providers update this record themselves, so call before visiting.
How can I verify Randy C. Mathewson, M.D.'s license?
NPPES lists Wisconsin license number 23146, 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.
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.