Elizabeth Vonderhaar, MD
NPI 1770711947 · Obstetrics & Gynecology Physician · O Fallon, IL
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Vonderhaar, MD is a Obstetrics & Gynecology Physician provider in O Fallon, IL (NPI 1770711947).
Provider details
- NPI number
- 1770711947
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 2019046136 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
17 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
- 2009-06-26
- Last updated
- 2026-04-22
- Certified
- 2026-04-22
Frequently asked questions
- What is Elizabeth Vonderhaar's NPI number?
- Elizabeth Vonderhaar's National Provider Identifier (NPI) is 1770711947, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Vonderhaar's specialty?
- Elizabeth Vonderhaar is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Vonderhaar located?
- Elizabeth Vonderhaar's practice location on file with NPPES is 1 Saint Elizabeth Blvd, O Fallon, IL 62269-1099.
- What is Elizabeth Vonderhaar's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Vonderhaar is (618) 234-2120.
- Does Elizabeth Vonderhaar accept Medicare?
- Elizabeth Vonderhaar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Vonderhaar's NPI active?
- Yes — Elizabeth Vonderhaar's NPI (1770711947) is active in the NPPES registry as of the last update on 2026-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.