Ann Nattinger, MD
NPI 1598717266 · Internal Medicine Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ann Nattinger, MD is a Internal Medicine Physician provider in Milwaukee, WI (NPI 1598717266).
Provider details
- NPI number
- 1598717266
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 29279 (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
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
Mailing address
Registry dates
- Enumerated
- 2006-05-17
- Last updated
- 2019-04-04
Frequently asked questions
- What is Ann Nattinger's NPI number?
- Ann Nattinger's National Provider Identifier (NPI) is 1598717266, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ann Nattinger's specialty?
- Ann Nattinger is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ann Nattinger located?
- Ann Nattinger's practice location on file with NPPES is 9200 W Wisconsin Ave, Milwaukee, WI 53226-3522.
- What is Ann Nattinger's phone number?
- The practice phone number listed in the NPPES registry for Ann Nattinger is (414) 805-6850.
- Does Ann Nattinger accept Medicare?
- Ann Nattinger is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ann Nattinger's NPI active?
- Yes — Ann Nattinger's NPI (1598717266) is active in the NPPES registry as of the last update on 2019-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.