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HANNAH FLAK
NPI 1043995111
Physician Assistant - Surgical in Marshfield, WI

Active since June 16, 2023PECOS EnrolledAccepts Medicare Assignment
1000 NORTH OAK AVENUE, MARSHFIELD, WI 54449(715) 387-5511 Get Directions Write a Review

NPPES record last updated: November 18, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Nov 18, 2025, Sep 11, 2025, Jun 16, 2023 (3 updates tracked since 2023).

About Hannah Flak NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

HANNAH FLAK (NPI 1043995111) is an individual surgical provider in Marshfield, Wisconsin, licensed in Wisconsin (8455) and active in the NPI registry since June 2023. She is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center, and maintains a secondary practice location in Wittenberg.

NPPES Registry Identity

NPI1043995111
Entity TypeIndividualFemale
Primary Taxonomy363AS0400X
Provider Legal NameHANNAH FLAK
Location Address1000 NORTH OAK AVENUEMarshfield, WI 54449-5703
Mailing Address1000 N Oak AveMarshfield, WI 54449-5703 · (153) 875-5117
Phone(715) 387-5511
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateJune 16, 2023
Last NPPES UpdateNovember 18, 20253 updates tracked since enumeration
NPPES CertifiedNovember 18, 2025
✔ NPI 1043995111 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician Assistant · SurgicalPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363AS0400X
License✔ Licensed in WI · 8455
1000 NORTH OAK AVENUE, Marshfield, WI 54449
Open in Google Maps ↗

Secondary Practice Location 1

Location 1W16981 Thorn Apple DrWittenberg, WI 54499-8456 · Phone (715) 326-0156

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Sanford Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Hannah Flak is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3173029535
PECOS Enrollment IDI20251003001810
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Marshfield Medical Center

Acute Care Hospitals · Marshfield, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number520037
Location611 St Joseph AveMarshfield, WI 54449 · Wood County
Emergency services Birthing friendly

Other Providers at the Same Location NPPES 12

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PAUL FISCHBUCH MD
Pediatrics
1000 NORTH OAK AVENUE
MARSHFIELD, WI 54449
Wood County (715) 387-5511
DR. MOHAMMED ILYAS MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
1000 NORTH OAK AVENUE
MARSHFIELD, WI 54449
Wood County (715) 387-5511
DR. RAQUEL TANYA BUSER MD
Anesthesiology
1000 NORTH OAK AVENUE
MARSHFIELD, WI 54449
Wood County (715) 387-5511
JANESSA MARIE ROTH
Physician Assistant
1000 NORTH OAK AVENUE
MARSHFIELD, WI 54449
Wood County (715) 387-5511
DR. ALISSA LEE SMALL MD
Obstetrics & Gynecology
1000 NORTH OAK AVENUE
MARSHFIELD, WI 54449
Wood County (715) 387-5511
VIRGINIA ZERMENO BUSTAMANTE
Student in an Organized Health Care Education/Training Program
1000 NORTH OAK AVENUE, MEDPEDS 1F2
MARSHFIELD, WI 54449
Wood County (715) 387-5511
DR. TEMESGEN SHIBRE MD
Hospitalist
1000 NORTH OAK AVENUE
MARSHFIELD, WI 54449
Wood County (715) 387-5511
CARLEY VENTO DNP
Nurse Practitioner
1000 NORTH OAK AVENUE
MARSHFIELD, WI 54449
Wood County (715) 387-5511

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Hannah Flak's NPI number?

The NPI number for Hannah Flak is 1043995111. It was assigned to this individual provider in the NPPES registry on June 16, 2023.

Where is Hannah Flak located?

Hannah Flak practices at 1000 North Oak Avenue, Marshfield, WI 54449. The listed phone number is (715) 387-5511.

What is Hannah Flak's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Surgical, with taxonomy code 363AS0400X.

Is Hannah Flak enrolled in Medicare?

Yes. Hannah Flak is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Hannah Flak accept?

Health plans from Anthem Blue Cross and Blue Shield and Sanford Health Plan list Hannah Flak as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Hannah Flak affiliated with any hospitals?

According to CMS data, Hannah Flak is affiliated with Marshfield Medical Center.

When was this NPI record last updated?

The NPPES record for Hannah Flak was last updated on November 18, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.