Sierra R Guenther, MSN, FNP - Nurse Practitioner in Appleton, WI

Sierra R Guenther, MSN, FNP is a Nurse Practitioner - Family based in Appleton, Wisconsin. Sierra R Guenther is licensed to practice in Wisconsin (license number 18624) and her current practice location is 3925 N Gateway Dr, Appleton, Wisconsin. She can be reached at her office (for appointments etc.) via phone at (920) 205-0279.

NPI number for Sierra R Guenther is 1316869407 and her current mailing address is 3 Neenah Ctr, Neenah, Wisconsin. She does not participate in medicare program and thus does not accept medicare assignments. Her NPI Number is 1316869407.

Contact Information

Sierra R Guenther, MSN, FNP
3925 N Gateway Dr,
Appleton, WI 54913-7863
(920) 205-0279
Not Available

Map and Direction




Provider's Profile

Full NameSierra R Guenther
GenderFemale
SpecialityNurse Practitioner - Family
Location3925 N Gateway Dr, Appleton, Wisconsin
Accepts Medicare AssignmentsDoes not participate in Medicare Program. She may not accept medicare assignment.
  NPI Data:
  • NPI Number: 1316869407
  • Provider Enumeration Date: 07/29/2026
  • Last Update Date: 10/01/2026

Medical Identifiers

Medical identifiers for Sierra R Guenther such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1316869407NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363LF0000XNurse Practitioner - Family 18624 (Wisconsin)Primary

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. Sierra R Guenther is NOT enrolled with medicare and thus cannot prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Sierra R Guenther, MSN, FNP
3 Neenah Ctr,
Neenah, WI 54956-3070

Ph: (920) 830-5900
Sierra R Guenther, MSN, FNP
3925 N Gateway Dr,
Appleton, WI 54913-7863

Ph: (920) 205-0279

Reviews and Comments


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Dessia J Laxton, APNP
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Medicare: Accepting Medicare Assignments
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Phone: 920-731-8900    Fax: 920-738-5369

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.