Dr Ruth Callaway Warren, DO - Medicare Medical Oncology in Green Bay, WI

Dr Ruth Callaway Warren, DO is a medicare enrolled "Internal Medicine - Medical Oncology" physician in Green Bay, Wisconsin. She went to Midwestern University, Chicago College Of Osteopathic Med and graduated in 1999 and has 25 years of diverse experience with area of expertise as Medical Oncology. She is a member of the group practice Schoolcraft Memorial Hospital, St Vincent Hospital-hospital Sisters-third Order Of St Francis, St Francis Hospital and her current practice location is 1726 Shawano Ave, Green Bay, Wisconsin. You can reach out to her office (for appointments etc.) via phone at (920) 884-3135.

Dr Ruth Callaway Warren is licensed to practice in Wisconsin (license number 50362) 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 1124096185.

Contact Information

Dr Ruth Callaway Warren, DO
1726 Shawano Ave,
Green Bay, WI 54303-3216
(920) 884-3135
(920) 884-3144

Map and Direction




Physician's Profile

Full NameDr Ruth Callaway Warren
GenderFemale
SpecialityMedical Oncology
Experience25 Years
Location1726 Shawano Ave, Green Bay, Wisconsin
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:
  • Dr Ruth Callaway Warren attended and graduated from Midwestern University, Chicago College Of Osteopathic Med in 1999
  NPI Data:
  • NPI Number: 1124096185
  • Provider Enumeration Date: 03/08/2006
  • Last Update Date: 12/20/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 6608913512
  • Enrollment ID: I20091124000158

Medical Identifiers

Medical identifiers for Dr Ruth Callaway Warren such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1124096185NPI-NPPES
1124096185OtherWIBCBS ANTHEM
1124096185MedicaidMI
100004011MedicaidWI

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RX0202XInternal Medicine - Medical Oncology 5101018539 (Michigan)Secondary
207RX0202XInternal Medicine - Medical Oncology 50362 (Wisconsin)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St Vincent HospitalGreen bay, WIHospital
Schoolcraft Memorial HospitalManistique, MIHospital
Osf St Francis Hospital And Medical GroupEscanaba, MIHospital
St Mary's Hospital Medical CenterGreen bay, WIHospital
Hshs St Clare Memorial HospitalOconto falls, WIHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Schoolcraft Memorial Hospital408252511833
St Vincent Hospital-hospital Sisters-third Order Of St Francis5799694675562
St Francis Hospital599160475354

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. Dr Ruth Callaway Warren allows following entities to bill medicare on her behalf.
Entity NameSt Vincent Hospital-hospital Sisters-third Order Of St Francis
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1689694911
PECOS PAC ID: 5799694675
Enrollment ID: O20040126000012
Entity NameAscension Ne Wisconsin, Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1407803638
PECOS PAC ID: 7719897784
Enrollment ID: O20061027000037

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. Dr Ruth Callaway Warren 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
Dr Ruth Callaway Warren, DO
1726 Shawano Ave,
Green Bay, WI 54303-3216

Ph: (920) 884-3135
Dr Ruth Callaway Warren, DO
1726 Shawano Ave,
Green Bay, WI 54303-3216

Ph: (920) 884-3135

Reviews and Comments


Internal Medicine Doctors in Green Bay, WI

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Phone: 920-435-8326    Fax: 920-430-4659

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.

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