Michael A. Lenz, M.D.
Internal Medicine Physician · Wauwatosa, WI
Michael A. Lenz, M.D. is an internal medicine physician with a practice address in Wauwatosa, Wisconsin, and NPI 1609848167, issued on Feb 7, 2006. Check the license (Wisconsin 42188, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Michael A. Lenz
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 42188 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1155 N Mayfair RD, Wauwatosa, WI 53226
- Phone
- (414) 955-5990
- Enumerated
- Feb 7, 2006
- Record last updated
- Jul 21, 2023
- Medicaid ID
- 32647500 WI
- Medicare enrollment
- Enrolled (PECOS I20070314000406); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 1155 N Mayfair RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Cassandra Bell, P.A.Physician Assistant1265486120
- Delaney Bowling, NPFamily Nurse Practitioner1427717966
Verify Michael A. Lenz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 42188Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,042 Medicare Part D claims for 231 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Gabapentin139 claims
- Rosuvastatin Calcium121 claims
- Atorvastatin Calcium117 claims
- Dextroamphetamine-Amphet Er73 claims
- Losartan Potassium71 claims
- Dextroamphetamine-Amphetamine61 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.
Bills Medicare through one group practice
- Froedtert Andthe Medical College OF Wisconsin Community Physicians IncMenomonee Falls, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael A. Lenz among 2,078 internal medicine physician records in Wisconsin
Michael A. Lenz, 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. 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 fileYes · 53% of these records are
- Graduated1996 · median 2002 among the 1,098 with a school on file
- Record last updated2023 · 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).
45 internal medicine physician records list a practice address in Wauwatosa
They are 45 of the 1,787 NPPES records with a practice address in Wauwatosa, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Wauwatosa → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gary Barnas, MDMilwaukee, WI 532261902857329
- Karen Fickel, MDMilwaukee, WI 532261336190255
- Kathlyn Fletcher, MDMilwaukee, WI 532261306897236
- Sandra Green, MDMilwaukee, WI 532261871544692
- Tiffany Hubbard, MDWauwatosa, WI 532261518918093
- Samuel Idarraga, M.D.Wauwatosa, WI 532261700850070
- Jasna Jevtic, MDMilwaukee, WI 532261386695823
- Jack Kaufman, MDMilwaukee, WI 532261740231299
Common questions
What is Michael A. Lenz, M.D.'s NPI number?
Michael A. Lenz, M.D.'s National Provider Identifier (NPI) is 1609848167, issued on Feb 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael A. Lenz, M.D. located?
The NPPES record lists a practice address at 1155 N Mayfair RD, Wauwatosa, WI, 53226. Phone: (414) 955-5990. Providers update this record themselves, so call before visiting.
How can I verify Michael A. Lenz, M.D.'s license?
NPPES lists Wisconsin license number 42188, 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 Michael A. Lenz, M.D. prescribe under Medicare Part D?
In 2024, Michael A. Lenz, M.D. had 2,042 Medicare Part D claims for 231 beneficiaries; 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.