Mark Timmerman, MD
NPI 1881649333 · Sports Medicine (Family Medicine) Physician · Spring Green, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Timmerman, MD is a Sports Medicine (Family Medicine) Physician provider in Spring Green, WI (NPI 1881649333).
Provider details
- NPI number
- 1881649333
- Entity type
- Individual
- Primary specialty
- Sports Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 31402-020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 61 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 86 | 23 |
| Amlodipine Besylate | 80 | 19 |
| Losartan Potassium | 80 | 25 |
| Tamsulosin Hcl | 68 | 16 |
| Rosuvastatin Calcium | 67 | 22 |
| Omeprazole | 61 | 25 |
| Simvastatin | 60 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-23
- Last updated
- 2008-04-29
Frequently asked questions
- What is Mark Timmerman's NPI number?
- Mark Timmerman's National Provider Identifier (NPI) is 1881649333, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Timmerman's specialty?
- Mark Timmerman is listed in the NPPES registry with a primary specialty of Sports Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Timmerman located?
- Mark Timmerman's practice location on file with NPPES is 436 Sunrise Dr, Spring Green, WI 53588-9286.
- What is Mark Timmerman's phone number?
- The practice phone number listed in the NPPES registry for Mark Timmerman is (608) 588-2502.
- Does Mark Timmerman accept Medicare?
- Mark Timmerman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Timmerman's NPI active?
- Yes — Mark Timmerman's NPI (1881649333) is active in the NPPES registry as of the last update on 2008-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.