Mark Timmerman, MD
Family Medicine Physician · Spring Green, WI
Mark Timmerman, MD is a family medicine physician with a practice address in Spring Green, Wisconsin, and NPI 1881649333, issued on May 23, 2006. Check the license (Wisconsin 31402-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mark Timmerman
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 31402-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 436 Sunrise Dr, Spring Green, WI 53588
- Phone
- (608) 588-2502
- Enumerated
- May 23, 2006
- Entity
- Type 1 · individual
Also registered at 436 Sunrise Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Denu, PAPhysician Assistant1659346559
- Luke Fortney, MDFamily Medicine Physician1720057698
- Masaru Furukawa, MDStudent in an Organized Health Care Education/Training Program1447484258
- Eric Jones, DOFamily Medicine Physician1053979492
- Ellen Olson, MDFamily Medicine Physician1306812045
- Lindsay Rothering, PTPhysical Therapist1225189566
Verify Mark Timmerman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 31402-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
34% fewer Medicare Part D claims than the average family medicine physician in 2024
2,318 Medicare Part D claims for 140 beneficiaries, against an average of 3,519 among the 111,126 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Atorvastatin Calcium86 claims
- Amlodipine Besylate80 claims
- Losartan Potassium80 claims
- Tamsulosin Hcl68 claims
- Rosuvastatin Calcium67 claims
- Omeprazole61 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.
One hospital or facility affiliation
- Sauk Prairie Healthcare IncSpring Green, WI
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
7 family medicine physician records list a Spring Green practice address
They are 7 of the 52 NPPES records with a Spring Green practice address, and 3,629 family medicine physician records in Wisconsin.
All 7 in Spring Green → All 3,629 in Wisconsin → Every provider in Spring Green →
Other family medicine physician records in Wisconsin
- Ghudran Abdulal, MDNew Berlin, WI1083622666
- Vanessa Abejuela-Matt, D.O.Mount Pleasant, WI1558687749
- Benjamin Abeyta, M.D.Wauwatosa, WI1447511597
- Emily Abeyta, MDWaukesha, WI1386905107
- Islam Abo Al Nadie, MDMilwaukee, WI1326618786
- Jeanette Abraham, MDWeston, WI1205895810
- Sarada Abraham, M.D.Oconomowoc, WI1962851972
- Kirsten Abramson, MDMadison, WI1417909979
- Alexandra Adams, MD PHDMadison, WI1184689291
- David AdamsMadison, WI1992986897
Common questions
What is Mark Timmerman, MD's NPI number?
Mark Timmerman, MD's National Provider Identifier (NPI) is 1881649333, issued on May 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Timmerman, MD located?
The NPPES record lists a practice address at 436 Sunrise Dr, Spring Green, WI, 53588. Phone: (608) 588-2502. Providers update this record themselves, so call before visiting.
How can I verify Mark Timmerman, MD's license?
NPPES lists Wisconsin license number 31402-020, 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 Mark Timmerman, MD prescribe under Medicare Part D?
In 2024, Mark Timmerman, MD had 2,318 Medicare Part D claims for 140 beneficiaries; the average among family medicine physician prescribers was 3,519. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.