William D. Timm, MD
Infectious Disease Physician · Brookfield, WI
William D. Timm, MD is an infectious disease physician with a practice address in Brookfield, Wisconsin, and NPI 1902856016, issued on May 11, 2006. Check the license (Wisconsin 33843-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William D. Timm
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 33843-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 150 S Sunny Slope RD Ste 136, Brookfield, WI 53005
- Phone
- (262) 786-4550
- Enumerated
- May 11, 2006
- Record last updated
- Jan 16, 2025
- Fax
- (262) 786-4552
- Medicaid ID
- 31980100 WI
- Medicare enrollment
- Enrolled (PECOS I20040122000548); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 171 in Wisconsin → Look up another NPI →
Also registered at 150 S Sunny Slope RD Ste 136
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kathleen Barta, PA-CPhysician Assistant1720038292
- Peter Collins, PAPhysician Assistant1710691100
- Jennifer Hong, DOInfectious Disease Physician1033658232
- David Letzer, MDInfectious Disease Physician1255382529
- Jaclyn Lucas, MPAS, PA-CMedical Physician Assistant1801200167
- Sarah StinskiMedical Physician Assistant1306421508
Verify William D. Timm in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 33843-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% more Medicare Part D claims than the average infectious disease physician in 2024
812 Medicare Part D claims for 192 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Ceftriaxone101 claims
- Cefuroxime79 claims
- Daptomycin70 claims
- Biktarvy54 claims
- Cephalexin47 claims
- Amoxicillin46 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.
Industry payments in 2024: $54.31
3 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 3,895 providers of this specialty with any payment received $4,362.19 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Infectious Disease Specialists OF SE WI, SCBrookfield, WI
- Thedacare, IncorporatedAppleton, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William D. Timm among 171 infectious disease physician records in Wisconsin
William D. Timm, MD is one of 171 infectious disease physician records with a practice address in Wisconsin. 83% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 53% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1991 · median 2004 among the 125 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Wisconsin
There are 171 infectious disease physician records in Wisconsin.
All 171 in Wisconsin → Every provider in Brookfield → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Jennifer Hong, DOBrookfield, WI 530051033658232
- David Letzer, MDBrookfield, WI 530051255382529
- Thomas Taft, MDBrookfield, WI 530051851341994
- Claudia Altmann, MDGrafton, WI 530241386691756
- Sonia Dhingra, M.D.Grafton, WI 530241164641478
- Paula Jones, MDGrafton, WI 530241649210287
- Krishna Bobbili, MDSheboygan, WI 530811851364699
- Nisha Sheth, M.D.Elkhorn, WI 531211992949895
Common questions
What is William D. Timm, MD's NPI number?
William D. Timm, MD's National Provider Identifier (NPI) is 1902856016, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William D. Timm, MD located?
The NPPES record lists a practice address at 150 S Sunny Slope RD Ste 136, Brookfield, WI, 53005. Phone: (262) 786-4550. Providers update this record themselves, so call before visiting.
How can I verify William D. Timm, MD's license?
NPPES lists Wisconsin license number 33843-020, 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 William D. Timm, MD prescribe under Medicare Part D?
In 2024, William D. Timm, MD had 812 Medicare Part D claims for 192 beneficiaries; the average among infectious disease physician prescribers was 689. 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.