Ruben F. Lewin, MD
Cardiovascular Disease Physician · Greenfield, WI
Ruben F. Lewin, MD is a cardiovascular disease physician with a practice address in Greenfield, Wisconsin, and NPI 1952365728, issued on Apr 17, 2006. Check the license (Wisconsin 28898020, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Ruben F. Lewin
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 28898020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 4931 S 27TH St, Greenfield, WI 53221
- Phone
- (414) 672-7200
- Enumerated
- Apr 17, 2006
- Record last updated
- Mar 11, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (414) 672-7400
- Medicaid ID
- 21271800 WI
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 449 in Wisconsin → Look up another NPI →
Also registered at 4931 S 27TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hope Kelling, FNP-C, APNPFamily Nurse Practitioner1710946926
- Hector Lopez, MDFamily Medicine Physician1952389876
- Alejandra SotoPhysician Assistant1972334423
Verify Ruben F. Lewin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 28898020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Ruben F. Lewin among 449 cardiovascular disease physician records in Wisconsin
Ruben F. Lewin, MD is one of 449 cardiovascular disease physician records with a practice address in Wisconsin. 77% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 42% newer
- In a Medicare fileNo · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2011 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Wisconsin
There are 449 cardiovascular disease physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 449 in Wisconsin → Every provider in Greenfield → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Jeffrey Rogers, M.D.Milwaukee, WI 532211194798751
- Alan Daniel, M.D.Milwaukee, WI 532171699840678
- Burton Friedman, M.D.River Hills, WI 532171124007034
- Barry Gimbel, MDMilwaukee, WI 532171093715856
- Maqsood Ahmad, M.DMilwaukee, WI 532161639143548
- Seydi Aksut, MDMilwaukee, WI 532161194890236
- Lisa Armaganian, MDWauwatosa, WI 532261760442180
- Lee Biblo, MDMilwaukee, WI 532261740230275
Common questions
What is Ruben F. Lewin, MD's NPI number?
Ruben F. Lewin, MD's National Provider Identifier (NPI) is 1952365728, issued on Apr 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ruben F. Lewin, MD located?
The NPPES record lists a practice address at 4931 S 27TH St, Greenfield, WI, 53221. Phone: (414) 672-7200. Providers update this record themselves, so call before visiting.
How can I verify Ruben F. Lewin, MD's license?
NPPES lists Wisconsin license number 28898020, 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.