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MARLO AHN WILLMAN SLP
NPI 1871239475
Speech-Language Pathologist in Green Bay, WI

Active since May 07, 2022
744 S WEBSTER AVE, GREEN BAY, WI 54301(920) 433-7822(920) 433-3651 Get Directions Write a Review

NPPES record last updated: March 19, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 19, 2025, Mar 3, 2025, May 10, 2022 and 1 more (4 updates tracked since 2022).

About Marlo Ahn Willman Slp NPPES

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

MARLO AHN WILLMAN SLP (NPI 1871239475) is an individual speech-language pathologist provider in Green Bay, Wisconsin, licensed in Wisconsin (6489-154) and active in the NPI registry since May 2022. She maintains 5 additional practice locations.

NPPES Registry Identity

NPI1871239475
Entity TypeIndividualFemale
Primary Taxonomy235Z00000X
Provider Legal NameMARLO AHN WILLMANCredential: SLP
Location Address744 S WEBSTER AVEGreen Bay, WI 54301-3505
Mailing Address3 Neenah CtrNeenah, WI 54956-3070 · (920) 830-5900 · Fax (920) 830-5910
Phone(920) 433-7822
Fax(920) 433-3651
Sole ProprietorNo
Enumeration DateMay 7, 2022
Last NPPES UpdateMarch 19, 20254 updates tracked since enumeration
NPPES CertifiedMarch 19, 2025
✔ NPI 1871239475 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers
Taxonomy Code235Z00000X
License✔ Licensed in WI · 6489-154
Definition
The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.
744 S WEBSTER AVE, Green Bay, WI 54301
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Other Names 1

Former Name (1)Marlo Ahn Stevens

Secondary Practice Locations 5

Location 1555 Redbird CirDE Pere, WI 54115-7977 · Phone (920) 338-6820 · Fax (920) 338-6829
Location 21580 Commanche AveGreen Bay, WI 54313-5751 · Phone (920) 435-8326 · Fax (920) 430-4659
Location 3725 S Webster AveGreen Bay, WI 54301-3500 · Phone (920) 433-3655 · Fax (920) 433-3539
Location 41818 N Meade StAppleton, WI 54911-3454 · Phone (920) 731-4101 · Fax (920) 830-5979
Location 5820 Arbutus AveOconto, WI 54153-2004 · Phone (920) 835-1100

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare).Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marlo Ahn Willman Slp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignments

2

Medicare enrollment records show Marlo Willman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Bellin Memorial Hospital Inc
Same address
Family Medicine
744 S WEBSTER AVE
Green Bay, WI 54301
  • Reassigned Medicare billing, Wisconsin enrollment
  • 875 clinicians in this Medicare group
NPI 1033172390 (920) 445-7272
Oconto Hospital & Medical Center Inc
24 mi
Rural Health
575 4TH ST
Kewaunee, WI 54216
  • Reassigned Medicare billing, Wisconsin enrollment
  • 573 clinicians in this Medicare group
NPI 1053279091 (920) 388-4640

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

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

TAMMY ANN MOTQUIN
Nurse Practitioner (Family)
744 S WEBSTER AVE
GREEN BAY, WI 54301
Brown County (920) 445-7226
DR. PAMELA RANI SUD MD
Internal Medicine (Pulmonary Disease)
744 S WEBSTER AVE
GREEN BAY, WI 54301
Brown County (920) 433-7451
CALEY PETERS RPH
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
744 S WEBSTER AVE
GREEN BAY, WI 54301
Brown County (920) 431-5696
YONGSUB CHOI
Internal Medicine
744 S WEBSTER AVE
GREEN BAY, WI 54301
Brown County (920) 433-3500
CORINNE ELIZABETH GEORGE APNP
Nurse Practitioner (Neonatal)
744 S WEBSTER AVE
GREEN BAY, WI 54301
Brown County (920) 433-3500
STEVEN THANH HO CAA
Anesthesiologist Assistant
744 S WEBSTER AVE
GREEN BAY, WI 54301
Brown County (920) 433-3605
JAMIE LYNN MOSUPYE O.T.
Occupational Therapist
744 S WEBSTER AVE
GREEN BAY, WI 54301
Brown County (920) 433-7823
MIRANDA MARIE HINTZ APNP
Nurse Practitioner
744 S WEBSTER AVE
GREEN BAY, WI 54301
Brown County (920) 433-7457

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 Marlo Willman's NPI number?

The NPI number for Marlo Willman is 1871239475. It was assigned to this individual provider in the NPPES registry on May 7, 2022. The provider is also known as Marlo Ahn Stevens.

Where is Marlo Willman located?

Marlo Willman practices at 744 S Webster Ave, Green Bay, WI 54301. The listed phone number is (920) 433-7822.

What is Marlo Willman's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

Is Marlo Willman enrolled in Medicare?

Yes. Marlo Willman is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marlo Willman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marlo Willman reassigns Medicare benefits to 2 organizations: Bellin Memorial Hospital Inc (Green Bay, WI) and Oconto Hospital & Medical Center Inc (Kewaunee, WI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marlo Willman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marlo Willman accept?

Health plans from CareSource (Common Ground Healthcare) list Marlo Willman 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.

When was this NPI record last updated?

The NPPES record for Marlo Willman was last updated on March 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.