Katherine Hartstern, MD - Medicare Family Medicine in Oshkosh, WI

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Katherine Hartstern, MD is a medicare enrolled "Family Medicine" physician in Oshkosh, Wisconsin. Her current practice location is 1855 S Koeller St, Oshkosh, Wisconsin. You can reach out to her office (for appointments etc.) via phone at (920) 738-2000.

Katherine Hartstern is licensed to practice in Wisconsin (license number 82621) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1437773652.

Contact Information

Katherine Hartstern, MD
1855 S Koeller St,
Oshkosh, WI 54902-6186
(920) 738-2000
Not Available

Map and Direction




Physician's Profile

Full NameKatherine Hartstern
GenderFemale
SpecialityFamily Medicine
Location1855 S Koeller St, Oshkosh, Wisconsin
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1437773652
  • Provider Enumeration Date: 06/03/2020
  • Last Update Date: 03/19/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 1355765124
  • Enrollment ID: I20231103002261

Medical Identifiers

Medical identifiers for Katherine Hartstern such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1437773652NPI-NPPES
100253512MedicaidWI

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine 125076039 (Illinois)Secondary
207Q00000XFamily Medicine 82621 (Wisconsin)Primary

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. Katherine Hartstern allows following entities to bill medicare on her behalf.
Entity NameAscension Medical Group-fox Valley Wisconsin Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1730126392
PECOS PAC ID: 0244142420
Enrollment ID: O20031105000351

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. Katherine Hartstern 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
Katherine Hartstern, MD
1855 S Koeller St,
Oshkosh, WI 54902-6186

Ph: (920) 738-2000		Katherine Hartstern, MD
1855 S Koeller St,
Oshkosh, WI 54902-6186

Ph: (920) 738-2000

Reviews and Comments


Family Medicine Doctors in Oshkosh, WI

Eric A Smiltneek, MD
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Practice Location: 414 Doctors Ct, Oshkosh, WI 54901
Phone: 920-303-5100    
Alexey Shereshevsky, M.D.
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Medicare: Accepting Medicare Assignments
Practice Location: 600 N. Westhaven Drive, Thedacare Physicians Oshkosh, Oshkosh, WI 54904
Phone: 920-237-5000    Fax: 920-237-5001
Michael Menard,
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Practice Location: 855 N Westhaven Dr, Oshkosh, WI 54904
Phone: 920-303-8700    
Harold W Boccheciamp, MD
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Medicare: Medicare Enrolled
Practice Location: 2725 Jackson St, Oshkosh, WI 54901
Phone: 920-223-7500    
James W Smrecek, MD
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Medicare: Not Enrolled in Medicare
Practice Location: 1855 S Koeller St, Oshkosh, WI 54902
Phone: 920-223-7300    
Dr. Scott J Beougher, DO
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5165 Chesapeake Ct, Oshkosh, WI 54901
Phone: 920-303-2254    
Karl C Larson, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2725 Jackson St, Oshkosh, WI 54901
Phone: 920-223-7500    Fax: 920-223-7630

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.