HEARING SERVICES
NPI 1639394117
Audiologist in Fairfield, CA

Q: What is Pine River Inc.'s NPI number?

The NPI number for Pine River Inc. is 1639394117. It was assigned to this organization in the NPPES registry on April 17, 2007. The provider is doing business as Hearing Services.

Q: What is Pine River Inc.'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 Pine River Inc. was last updated on February 2, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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 April 17, 2007

1700 PENNSYLVANIA AVE STE B, FAIRFIELD, CA 94533(707) 426-4327(707) 426-5190 Get Directions Write a Review

NPPES record last updated: February 2, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Feb 2, 2023, Feb 9, 2022, Sep 5, 2018 (3 updates tracked since 2018).

On this page

About Hearing Services NPPES

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

HEARING SERVICES (NPI 1639394117) is a healthcare organization registered as an audiologist in Fairfield, California and active in the NPI registry since April 2007. The organization maintains 2 additional practice locations and lists Denise Martin-sahim, Owner, as its authorized official.

NPPES Registry Identity

NPI1639394117

Entity TypeOrganization

Primary Taxonomy231H00000X

Legal Business NamePINE RIVER INC.

Location Address1700 PENNSYLVANIA AVE STE BFairfield, CA 94533-3510

Mailing Address1700 Pennsylvania Ave Ste BFairfield, CA 94533-3510 · (707) 426-4327 · Fax (707) 426-5190

Phone(707) 426-4327

Fax(707) 426-5190

Organization SubpartNo

Authorized OfficialDenise Martin-sahimOwner · (707) 426-4327

Enumeration DateApril 17, 2007

Last NPPES UpdateFebruary 2, 20233 updates tracked since enumeration

NPPES CertifiedFebruary 2, 2023

✔ NPI 1639394117 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAudiologistSpeech, Language and Hearing Service Providers

Taxonomy Code231H00000X

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.

1700 PENNSYLVANIA AVE STE B, Fairfield, CA 94533

Open in Google Maps ↗

Other Names 1

Doing Business AsHearing Services

Secondary Practice Locations 2

Location 1673 Merchant St Ste BVacaville, CA 95688-6952 · Phone (707) 446-0742

Location 2480 Redwood St Ste 14Vallejo, CA 94590-2958 · Phone (707) 642-8862

Other Identifiers 1

MedicaidAU0004410CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Hearing Services is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 2 clinicians reassign Medicare billing to Hearing Services, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.

Clinicians, nearest first (2)

Denise Martin-Sahim, AUD

Qualified Audiologist

NPI 1023182425

1700 PENNSYLVANIA AVE STE B
Fairfield, CA 94533

(707) 426-4327

Same address

Monica Guerrero Lara

Qualified Audiologist

NPI 1528696465

1620 PENNSYLVANIA AVE STE D
Fairfield, CA 94533

(707) 624-2703

Same address

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

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 Pine River Inc.'s NPI number?

The NPI number for Pine River Inc. is 1639394117. It was assigned to this organization in the NPPES registry on April 17, 2007. The provider is doing business as Hearing Services.

Where is Pine River Inc. located?

Pine River Inc. is located at 1700 Pennsylvania Ave Ste B, Fairfield, CA 94533. The listed phone number is (707) 426-4327.

What is Pine River Inc.'s specialty?

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

Is Pine River Inc. enrolled in Medicare?

Yes. Pine River Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Pine River Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Qualified Audiologist, reassign their Medicare billing to Pine River Inc.. A 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 the clinician's services. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Pine River Inc. was last updated on February 2, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.