Joan Sumkin, M.D.
NPI 1467555623 · Internal Medicine Physician · Madison, WI
Joan Sumkin, M.D. is a Internal Medicine Physician provider in Madison, WI (NPI 1467555623).
Provider details
- NPI number
- 1467555623
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 33034 (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
19 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
Mailing address
Registry dates
- Enumerated
- 2006-09-06
- Last updated
- 2017-12-18
Frequently asked questions
- What is Joan Sumkin's NPI number?
- Joan Sumkin's National Provider Identifier (NPI) is 1467555623, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joan Sumkin's specialty?
- Joan Sumkin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joan Sumkin located?
- Joan Sumkin's practice location on file with NPPES is 2500 Overlook Ter, Madison, WI 53705-2254.
- What is Joan Sumkin's phone number?
- The practice phone number listed in the NPPES registry for Joan Sumkin is (608) 256-1901.
- Is Joan Sumkin's NPI active?
- Yes — Joan Sumkin's NPI (1467555623) is active in the NPPES registry as of the last update on 2017-12-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.