Susan Felsenthal, MD
Internal Medicine Physician · Cudahy, WI
Susan Felsenthal, MD is an internal medicine physician with a practice address in Cudahy, Wisconsin, and NPI 1437264512, issued on Aug 20, 2006. Check the license (Wisconsin 47419, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Susan Felsenthal
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 47419 WI
036-058049 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5900 S Lake Dr, Cudahy, WI 53110
- Phone
- (414) 489-9000
- Enumerated
- Aug 20, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 5900 S Lake Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hailey Babcock, SLPSpeech-Language Pathologist1528935129
- Stephanie Blaha, PA-CPhysician Assistant1366054116
- Brenda Blunt, APNPNurse Practitioner1174878839
- Hayley Bunger, NPNurse Practitioner1841905247
- Gina Buono, MDHospitalist Physician1467411546
Verify Susan Felsenthal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 47419Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
43 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium11 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.
Susan Felsenthal among 2,078 internal medicine physician records in Wisconsin
Susan Felsenthal, MD 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. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileYes · 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).
6 internal medicine physician records list a practice address in Cudahy
They are 6 of the 174 NPPES records with a practice address in Cudahy, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Cudahy → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Armando Nunag, MDCudahy, WI 531101649385139
- Michael Nunag, D.O.Cudahy, WI 531101588827729
- Meenaxi Shah, MDCudahy, WI 531101932217155
- Javed SheikhCudahy, WI 531101790888931
- Jack Tertadian, M.D.Cudahy, WI 531101689780462
- Rajbir Dhillon, M.D.Burlington, WI 531051871615096
- Elizabeth Joseph, M.D.Burlington, WI 531051962424333
- Clifford Poplar, M.D.Delavan, WI 531151942396718
Common questions
What is Susan Felsenthal, MD's NPI number?
Susan Felsenthal, MD's National Provider Identifier (NPI) is 1437264512, issued on Aug 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Susan Felsenthal, MD located?
The NPPES record lists a practice address at 5900 S Lake Dr, Cudahy, WI, 53110. Phone: (414) 489-9000. Providers update this record themselves, so call before visiting.
How can I verify Susan Felsenthal, MD's license?
NPPES lists Wisconsin license number 47419, 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 Susan Felsenthal, MD prescribe under Medicare Part D?
In 2024, Susan Felsenthal, MD had 43 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.