Holly Isenhower, MD
NPI 1366534935 · Internal Medicine Physician · Madison, WI
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Holly Isenhower, MD is a Internal Medicine Physician provider in Madison, WI (NPI 1366534935).
Provider details
- NPI number
- 1366534935
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 43519 (WI)
Specialties & taxonomies
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
- 2006-09-29
- Last updated
- 2016-04-15
Frequently asked questions
- What is Holly Isenhower's NPI number?
- Holly Isenhower's National Provider Identifier (NPI) is 1366534935, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Holly Isenhower's specialty?
- Holly Isenhower is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Holly Isenhower located?
- Holly Isenhower's practice location on file with NPPES is 2500 Overlook Ter, Madison, WI 53705-2254.
- What is Holly Isenhower's phone number?
- The practice phone number listed in the NPPES registry for Holly Isenhower is (608) 256-1901.
- Does Holly Isenhower accept Medicare?
- Holly Isenhower is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Holly Isenhower's NPI active?
- Yes — Holly Isenhower's NPI (1366534935) is active in the NPPES registry as of the last update on 2016-04-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.