Mark G. Timmerman, MD
Sports Medicine (Family Medicine) Physician · Spring Green, WI
Mark G. Timmerman, MD is a sports medicine (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 G. Timmerman
- Credential
- MD
- Primary taxonomy
- Sports Medicine (Family Medicine) Physician 207QS0010X
- 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
- Record last updated
- Apr 29, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (608) 588-7724
- Medicaid ID
- 31648300 WI
- Medicare enrollment
- Enrolled (PECOS I20061204000250); accepts Medicare assignment
- Medical or professional school
- Mayo Medical School, 1989
- Entity
- Type 1 · individual
8 nearest sports medicine (family medicine) physician records → All 51 in Wisconsin → Look up another NPI →
Also registered at 436 Sunrise Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Lindsay Rothering, PTPhysical Therapist1225189566
Verify Mark G. 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
2.7 times the Medicare Part D claims of the average sports medicine (family medicine) physician in 2024
2,318 Medicare Part D claims for 140 beneficiaries, against an average of 855 among the 2,237 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.
Bills Medicare through one group practice
- Sauk Prairie Healthcare IncSpring Green, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark G. Timmerman among 51 sports medicine (family medicine) physician records in Wisconsin
Mark G. Timmerman, MD is one of 51 sports medicine (family medicine) physician records with a practice address in Wisconsin. 92% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 61% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1989 · median 2009 among the 39 with a school on file
- Record last updated2008 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QS0010X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 sports medicine (family medicine) physician record lists a practice address in Spring Green
They are 1 of the 52 NPPES records with a practice address in Spring Green, and 51 sports medicine (family medicine) physician records in Wisconsin.
All 51 in Wisconsin → Every provider in Spring Green → Sports Medicine (Family Medicine) Physician nationwide →
The 8 sports medicine (family medicine) physician records with the nearest ZIP codes
- Katherine Fox, M.D.Waunakee, WI 535971942462353
- Melissa Faubert, D.O.Lodi, WI 535551194137026
- David Krey, DOLodi, WI 535551528386703
- Darin Rutherford, MDJanesville, WI 535481770648123
- Deanne Eccles Rotar, MDJanesville, WI 535461932163110
- Dennys Maldonado, MDJanesville, WI 535461700055621
- Matthew Brown, MDMadison, WI 537041811203706
- David Gronski, MDMadison, WI 537131316990161
Common questions
What is Mark G. Timmerman, MD's NPI number?
Mark G. 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 G. 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 G. 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 G. Timmerman, MD prescribe under Medicare Part D?
In 2024, Mark G. Timmerman, MD had 2,318 Medicare Part D claims for 140 beneficiaries; the average among sports medicine (family medicine) physician prescribers was 855. 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.