Timothy S. Mulder, M.D.
Family Medicine Physician · Willmar, MN
Timothy S. Mulder, M.D. is a family medicine physician with a practice address in Willmar, Minnesota, and NPI 1336131747, issued on Aug 22, 2005. Check the license (Minnesota 40320, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Timothy S. Mulder
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 40320 MN
Self-reported in NPPES; status is on the state search - Practice location
- 502 2ND St SW Ste 1, Willmar, MN 56201
- Phone
- (320) 235-7232
- Enumerated
- Aug 22, 2005
- Record last updated
- Jan 22, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (320) 231-8602
- Medicaid ID
- 161218200 MN
- Medicare enrollment
- Enrolled (PECOS I20070828000020); accepts Medicare assignment
- Medical or professional school
- Sanford School Of Medicine Of University Of South Dakota, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,985 in Minnesota → Look up another NPI →
Also registered at 502 2ND St SW Ste 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lee Haggenjos, MDFamily Medicine Physician1003207416
- Jolene Schlegel, CNPNurse Practitioner1063798379
- Leia ZwillingFamily Nurse Practitioner1215634837
Verify Timothy S. Mulder in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 40320Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% more Medicare Part D claims than the average family medicine physician in 2024
6,071 Medicare Part D claims for 455 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 34 claims were for opioids.
Most prescribed
- Lisinopril335 claims
- Atorvastatin Calcium313 claims
- Simvastatin293 claims
- Amlodipine Besylate242 claims
- Losartan Potassium198 claims
- Tamsulosin Hcl179 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
- Centracare Clinic Southwest LLCWillmar, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy S. Mulder among 3,985 family medicine physician records in Minnesota
Timothy S. Mulder, M.D. is one of 3,985 family medicine physician records with a practice address in Minnesota. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1996 · median 2006 among the 2,483 with a school on file
- Record last updated2014 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
38 family medicine physician records list a practice address in Willmar
They are 38 of the 805 NPPES records with a practice address in Willmar, and 3,985 family medicine physician records in Minnesota.
All 3,985 in Minnesota → Every provider in Willmar → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Thomas Breen, MDWillmar, MN 562011760458830
- Daniel Fuglestad, MDWillmar, MN 562011215903935
- William Hicks, M. D.Willmar, MN 562011164422176
- Robert Hodapp, MDWillmar, MN 562011801862545
- Ronald Holmgren, MDWillmar, MN 562011679549745
- Margaret Johnson, MDWillmar, MN 562011932175239
- Robert Kaiser, MDWillmar, MN 562011033185103
- Douglas Knight, M.D.Willmar, MN 562011487632899
Common questions
What is Timothy S. Mulder, M.D.'s NPI number?
Timothy S. Mulder, M.D.'s National Provider Identifier (NPI) is 1336131747, issued on Aug 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Timothy S. Mulder, M.D. located?
The NPPES record lists a practice address at 502 2ND St SW Ste 1, Willmar, MN, 56201. Phone: (320) 235-7232. Providers update this record themselves, so call before visiting.
How can I verify Timothy S. Mulder, M.D.'s license?
NPPES lists Minnesota license number 40320, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Timothy S. Mulder, M.D. prescribe under Medicare Part D?
In 2024, Timothy S. Mulder, M.D. had 6,071 Medicare Part D claims for 455 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.