IndividualActive
Thomas Ansfield, M.D.
NPI 1700848538 · Internal Medicine Physician · Madison, WI
Thomas Ansfield, M.D. is a Internal Medicine Physician provider in Madison, WI (NPI 1700848538).
Provider details
- NPI number
- 1700848538
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 16119-020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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.
Practice location
4410 Regent St
Madison, WI 53705-4901
Phone: (608) 233-9746
Approximate (ZIP-level) locationGet directions
Mailing address
4410 Regent St
Madison, WI 53705-4901
Registry dates
- Enumerated
- 2006-04-05
- Last updated
- 2008-04-29
Frequently asked questions
- What is Thomas Ansfield's NPI number?
- Thomas Ansfield's National Provider Identifier (NPI) is 1700848538, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Ansfield's specialty?
- Thomas Ansfield is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Ansfield located?
- Thomas Ansfield's practice location on file with NPPES is 4410 Regent St, Madison, WI 53705-4901.
- What is Thomas Ansfield's phone number?
- The practice phone number listed in the NPPES registry for Thomas Ansfield is (608) 233-9746.
- Is Thomas Ansfield's NPI active?
- Yes — Thomas Ansfield's NPI (1700848538) 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.