Mariellen Fischer, PHD
NPI 1205880564 · Neurology Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mariellen Fischer, PHD is a Neurology Physician provider in Milwaukee, WI (NPI 1205880564).
Provider details
- NPI number
- 1205880564
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- No
- License
- 1091 (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
- 2006-05-20
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mariellen Fischer's NPI number?
- Mariellen Fischer's National Provider Identifier (NPI) is 1205880564, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mariellen Fischer's specialty?
- Mariellen Fischer is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Mariellen Fischer located?
- Mariellen Fischer's practice location on file with NPPES is Froedtert & Med College Clin - West, Milwaukee, WI 53226.
- What is Mariellen Fischer's phone number?
- The practice phone number listed in the NPPES registry for Mariellen Fischer is (414) 805-3666.
- Does Mariellen Fischer accept Medicare?
- Mariellen Fischer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mariellen Fischer's NPI active?
- Yes — Mariellen Fischer's NPI (1205880564) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.