Mary Ernster, MD
NPI 1407434517 · Pediatrics Physician · Madison, WI
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Ernster, MD is a Pediatrics Physician provider in Madison, WI (NPI 1407434517).
Provider details
- NPI number
- 1407434517
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 85282-20 (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
5 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
- 2021-03-30
- Last updated
- 2025-12-18
- Certified
- 2025-12-18
Frequently asked questions
- What is Mary Ernster's NPI number?
- Mary Ernster's National Provider Identifier (NPI) is 1407434517, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Ernster's specialty?
- Mary Ernster is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Ernster located?
- Mary Ernster's practice location on file with NPPES is 752 N High Point Rd, Madison, WI 53717-2236.
- What is Mary Ernster's phone number?
- The practice phone number listed in the NPPES registry for Mary Ernster is (608) 824-4997.
- Does Mary Ernster accept Medicare?
- Mary Ernster is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Ernster's NPI active?
- Yes — Mary Ernster's NPI (1407434517) is active in the NPPES registry as of the last update on 2025-12-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.