Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

HANNAH MARIE WILLIAMS AU.D.
NPI 1720836794
Audiologist in Aberdeen, SD

Q: What is Hannah Williams's NPI number?

The NPI number for Hannah Williams is 1720836794. It was assigned to this individual provider in the NPPES registry on May 7, 2024.

Q: What is Hannah Williams's specialty?

The primary specialty registered for this NPI is Audiologist with taxonomy code 231H00000X.

Q: When was this NPI record last updated?

The NPPES record for Hannah Williams was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 days 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.

Active since May 07, 2024Accepts Medicare Assignment

3001 6TH AVE SE STE 2, ABERDEEN, SD 57401(605) 725-4455(605) 725-4454 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 29, 2026, Jan 10, 2026, May 7, 2024 (3 updates tracked since 2024).

On this page

About Hannah Marie Williams Au.d. NPPES

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

HANNAH MARIE WILLIAMS AU.D. (NPI 1720836794) is an individual audiologist in Aberdeen, South Dakota, licensed in South Dakota (1135-A) and active in the NPI registry since May 2024. She is a graduate of Other (2024).

NPPES Registry Identity

NPI1720836794

Entity TypeIndividualFemale

Primary Taxonomy231H00000X

Provider Legal NameHANNAH MARIE WILLIAMSCredential: AU.D.

Location Address3001 6TH AVE SE STE 2Aberdeen, SD 57401-5471

Mailing Address39757 141st StGroton, SD 57445-6509 · (605) 857-1412

Phone(605) 725-4455

Fax(605) 725-4454

Sole ProprietorNo

Medical School CMSOtherGraduated 2024

Enumeration DateMay 7, 2024

Last NPPES UpdateSeptember 29, 20263 updates tracked since enumeration

NPPES CertifiedSeptember 29, 2026

✔ NPI 1720836794 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAudiologistSpeech, Language and Hearing Service Providers

Taxonomy Code231H00000X

License✔ Licensed in SD · 1135-A

Definition

(1) A specialist in evaluation, habilitation and rehabilitation of those whose communication disorders center in whole or in part in hearing function. Audiologists are autonomous professionals who identify, assess, and manage disorders of the auditory, balance and other neural systems. Audiologists provide audiological (aural) rehabilitation to children and adults across the entire age span. Audiologists select, fit and dispense amplification systems such as hearing aids and related devices. (2) An audiologist is a person qualified by a master's degree in audiology, licensed by the state, where applicable, and practicing within the scope of that license. Audiologists evaluate and treat patients with impaired hearing. They plan, direct and conduct rehabilitative programs with audiotry substitutional devises (hearing aids) and other therapy.

3001 6TH AVE SE STE 2, Aberdeen, SD 57401

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Avera Health Plans.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Hannah Marie Williams Au.d. 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 ID7810430378

PECOS Enrollment IDI20240625002153

Medicare Billing Reassignment

Medicare enrollment records show Hannah Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Schwab Audiology, Inc.

Same address

Audiologist

3001 6TH AVE SE, SUITE 2
Aberdeen, SD 57401

Reassigned Medicare billing, South Dakota enrollment
2 clinicians in this Medicare group

NPI 1881079796 (605) 725-4455

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

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Comprehensive hearing and speech recognition test 92557

A comprehensive hearing and speech recognition test assesses your ability to hear and understand spoken words. It includes hearing tests to check for issues with sound perception and speech tests to evaluate your word recognition. It's a crucial step in identifying any hearing or speech problems.

32 services32 patients

Test to assess middle ear function 92567

A test to assess middle ear function, also known as an impedance audiometry, helps evaluate how well your middle ear works. It measures the movement of your eardrum in response to changes in air pressure. This can help identify issues like fluid build-up, ear infections, or eardrum perforations.

16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 57401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$55.52 typical visit price

range $55.52 – $167.23

Typical copayment $13.88 (range $13.88 – $41.80)

Most-billed visit code 99202

Established Patient

$69.20 typical visit price

range $18.08 – $137.08

Typical copayment $17.30 (range $4.52 – $34.27)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Williams's NPI number?

The NPI number for Hannah Williams is 1720836794. It was assigned to this individual provider in the NPPES registry on May 7, 2024.

Where is Hannah Williams located?

Hannah Williams practices at 3001 6th Ave SE Ste 2, Aberdeen, SD 57401. The listed phone number is (605) 725-4455.

What is Hannah Williams's specialty?

The primary specialty registered for this NPI is Audiologist with taxonomy code 231H00000X.

Is Hannah Williams enrolled in Medicare?

Yes. Hannah Williams 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.

Which organization bills Medicare for Hannah Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hannah Williams reassigns Medicare benefits to Schwab Audiology, Inc. (Aberdeen, SD). The 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 Hannah Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Hannah Williams accept?

Health plans from Avera Health Plans list Hannah Williams 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 Hannah Williams was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 days 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.