STUART G. TREMBATH MA
NPI 1083798508
Audiologist in Mason City, IA

Q: What is Stuart Trembath's NPI number?

The NPI number for Stuart Trembath is 1083798508. It was assigned to this individual provider in the NPPES registry on October 24, 2006.

Q: What is Stuart Trembath'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 Stuart Trembath was last updated on August 3, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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 October 24, 2006

250 S CRESCENT DR, MASON CITY, IA 50401(641) 422-6424(641) 421-2556 Get Directions Write a Review

NPPES record last updated: August 3, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 3, 2022, Jul 2, 2021, Feb 3, 2021 (3 updates tracked since 2021).

On this page

About Stuart G. Trembath Ma NPPES

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

STUART G. TREMBATH MA (NPI 1083798508) is an individual audiologist in Mason City, Iowa, licensed in Iowa (00208) and active in the NPI registry since October 2006.

NPPES Registry Identity

NPI1083798508

Entity TypeIndividualMale

Primary Taxonomy231H00000X

Provider Legal NameSTUART G. TREMBATHCredential: MA

Location Address250 S CRESCENT DRMason City, IA 50401-2926

Mailing Address250 S Crescent DrMason City, IA 50401-2926 · (641) 422-6424 · Fax (641) 421-2556

Phone(641) 422-6424

Fax(641) 421-2556

Sole ProprietorNo

Enumeration DateOctober 24, 2006

Last NPPES UpdateAugust 3, 20223 updates tracked since enumeration

NPPES CertifiedAugust 3, 2022

✔ NPI 1083798508 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 IA · 00208

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.

250 S CRESCENT DR, Mason City, IA 50401

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Other Identifiers 1

Medicaid0173633IA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health, Oscar Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Stuart G. Trembath Ma is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignments

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

Hearing Associates Inc

Same address

Audiologist-Hearing Aid Fitter

250 S CRESCENT DR STE 100
Mason City, IA 50401

Reassigned Medicare billing, Minnesota enrollment
3 clinicians in this Medicare group

NPI 1285779132 (641) 494-5180

Mayo Clinic Health System-Southeast Minnesota Region

36 mi

Multi-Specialty

404 W FOUNTAIN ST
Albert Lea, MN 56007

Reassigned Medicare billing, Minnesota enrollment
1,571 clinicians in this Medicare group

NPI 1891701637 (507) 373-2384

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.

135 services135 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.

27 services27 patients

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.

LISA HOLT PMHNP-BC

Nurse Practitioner (Psychiatric/Mental Health)

250 S CRESCENT DR
MASON CITY, IA 50401

Cerro Gordo County (641) 494-5170

DR. RENE RECINOS M.D., PHD

Plastic Surgery

250 S CRESCENT DR
MASON CITY, IA 50401

Cerro Gordo County (641) 494-5360

DR. ANGELA KAYE HARVEY AU.D.

Audiologist

250 S CRESCENT DR, #100
MASON CITY, IA 50401

Cerro Gordo County (641) 494-5180

DR. MICHAEL W CRANE M.D.

Orthopaedic Surgery

250 S CRESCENT DR
MASON CITY, IA 50401

Cerro Gordo County (641) 494-5210

KAITLYN ELIZABETH MCDERMITT PA-C

Physician Assistant

250 S CRESCENT DR
MASON CITY, IA 50401

Cerro Gordo County (641) 494-5400

TRISHA LYNN TIBBITTS ARNP

Nurse Practitioner (Family)

250 S CRESCENT DR
MASON CITY, IA 50401

Cerro Gordo County (641) 494-5360

MASON CITY CLINIC PC

Otolaryngology

250 S CRESCENT DR
MASON CITY, IA 50401

Cerro Gordo County (800) 622-1411

DR. BYRON T BEASLEY MD

Internal Medicine (Cardiovascular Disease)

250 S CRESCENT DR
MASON CITY, IA 50401

Cerro Gordo County (641) 494-5300

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 Stuart Trembath's NPI number?

The NPI number for Stuart Trembath is 1083798508. It was assigned to this individual provider in the NPPES registry on October 24, 2006.

Where is Stuart Trembath located?

Stuart Trembath practices at 250 S Crescent Dr, Mason City, IA 50401. The listed phone number is (641) 422-6424.

What is Stuart Trembath's specialty?

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

Is Stuart Trembath enrolled in Medicare?

Yes. Stuart Trembath is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Stuart Trembath's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stuart Trembath reassigns Medicare benefits to 2 organizations: Hearing Associates Inc (Mason City, IA) and Mayo Clinic Health System-Southeast Minnesota Region (Albert Lea, MN). 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 Stuart Trembath's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Stuart Trembath accept?

Health plans from Oscar Health and Oscar Insurance Company list Stuart Trembath 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 Stuart Trembath was last updated on August 3, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.