Elizabeth K Vonderhaar, MD - Medicare Obstetrics/gynecology in O Fallon, IL

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Elizabeth K Vonderhaar, MD is a medicare enrolled "Obstetrics & Gynecology" physician in O Fallon, Illinois. She went to University Of Missouri, Kansas City, School Of Medicine and graduated in 2009 and has 17 years of diverse experience with area of expertise as Obstetrics/gynecology. She is a member of the group practice Obhg Illinois Sc and her current practice location is 1 Saint Elizabeth Blvd, O Fallon, Illinois. You can reach out to her office (for appointments etc.) via phone at (618) 234-2120.

Elizabeth K Vonderhaar is licensed to practice in Missouri (license number 2019046136) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1770711947.

Contact Information

Elizabeth K Vonderhaar, MD
1 Saint Elizabeth Blvd,
O Fallon, IL 62269-1099
(618) 234-2120
Not Available

Map and Direction




Physician's Profile

Full NameElizabeth K Vonderhaar
GenderFemale
SpecialityObstetrics/gynecology
Experience17 Years
Location1 Saint Elizabeth Blvd, O Fallon, Illinois
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Elizabeth K Vonderhaar attended and graduated from University Of Missouri, Kansas City, School Of Medicine in 2009
  NPI Data:
  • NPI Number: 1770711947
  • Provider Enumeration Date: 06/26/2009
  • Last Update Date: 04/22/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 4486880291
  • Enrollment ID: I20240726001889

Medical Identifiers

Medical identifiers for Elizabeth K Vonderhaar such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1770711947NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207V00000XObstetrics & Gynecology 2019046136 (Missouri)Primary
207V00000XObstetrics & Gynecology C195332 (California)Secondary
207V00000XObstetrics & Gynecology DR.0068755 (Colorado)Secondary
207V00000XObstetrics & Gynecology 036168189 (Illinois)Secondary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Obhg Illinois Sc781017970230

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Elizabeth K Vonderhaar allows following entities to bill medicare on her behalf.
Entity NameHeartland Women's Healthcare Ltd
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1851307532
PECOS PAC ID: 1759270648
Enrollment ID: O20040310001225
Entity NameObhg Illinois Sc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1700107216
PECOS PAC ID: 7810179702
Enrollment ID: O20110314001065

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Elizabeth K Vonderhaar is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Elizabeth K Vonderhaar, MD
777 Lowndes Hill Rd Bldg 1,
Greenville, SC 29607-2101

Ph: (864) 908-3530		Elizabeth K Vonderhaar, MD
1 Saint Elizabeth Blvd,
O Fallon, IL 62269-1099

Ph: (618) 234-2120

Reviews and Comments


Obstetrics & Gynecology Doctors in O Fallon, IL

Dr. Christina H Dothager, M.D.
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 787 Sunset Blvd Ste 200, O Fallon, IL 62269
Phone: 618-726-2229    Fax: 618-726-2225
Rosel Hirang Calong, MD
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 800 E Highway 50, O Fallon, IL 62269
Phone: 618-632-3518    Fax: 618-632-9330
Arthur Appleby Smith, MD
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 800 E Highway 50, O Fallon, IL 62269
Phone: 618-632-3518    Fax: 618-632-9330

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.