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MARY LYN MEIER
NPI 1932666849
Speech-Language Pathologist in Fairfield, CA

Active since February 27, 2019Accepts Medicare Assignment
1860 PENNSYLVANIA AVE STE 305, FAIRFIELD, CA 94533(707) 646-4333(707) 646-4833 Get Directions Write a Review

NPPES record last updated: October 17, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Mary Lyn Meier NPPES

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

MARY LYN MEIER (NPI 1932666849) is an individual speech-language pathologist provider in Fairfield, California, licensed in California (35331) and active in the NPI registry since February 2019. She maintains a secondary practice location in Walnut Creek and is a graduate of Other (2022).

NPPES Registry Identity

NPI1932666849
Entity TypeIndividualFemale
Primary Taxonomy235Z00000X
Provider Legal NameMARY LYN MEIER
Location Address1860 PENNSYLVANIA AVE STE 305Fairfield, CA 94533-3550
Mailing Address36000 Fremont Blvd Apt 167Fremont, CA 94536-3472 · (831) 402-9652
Phone(707) 646-4333
Fax(707) 646-4833
Sole ProprietorYes
Medical School CMSOtherGraduated 2022
Enumeration DateFebruary 27, 2019
Last NPPES UpdateOctober 17, 2025
NPPES CertifiedOctober 17, 2025
✔ NPI 1932666849 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 CA · 35331
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.
1860 PENNSYLVANIA AVE STE 305, Fairfield, CA 94533
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Secondary Practice Location 1

Location 11425 S Main StWalnut Creek, CA 94596-5318 · Phone (925) 295-4130

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

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

Mary Lyn Meier 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 ID8224474697
PECOS Enrollment IDI20240307001600

Medicare Billing Reassignments

3

Medicare enrollment records show Mary Meier reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Northbay Healthcare Group
Same address
Addiction Medicine
1860 PENNSYLVANIA AVE STE 230
Fairfield, CA 94533
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Northbay Physicians Surgery Center, LLC
  • 516 clinicians in this Medicare group
NPI 1780736736 (707) 646-4370
Northbay Health Medical Foundation
5.2 mi
Internal Medicine
4500 BUSINESS CENTER DR
Fairfield, CA 94534
  • Reassigned Medicare billing, California enrollment
  • 225 clinicians in this Medicare group
NPI 1760283527 (707) 646-3110
Permanente Medical Group Inc
14 mi
Internal Medicine
975 SERENO DRIVE
Vallejo, CA 94589
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1336222397 (707) 651-1000

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.

Treatment of swallowing and feeding disorder 92526
Treatment for swallowing and feeding disorders involves a team of specialists who will work together to improve your ability to eat and drink safely. This may include exercises to strengthen swallowing muscles, dietary changes, or special techniques to make swallowing easier.
44 services29 patients
Evaluation of swallowing function image 92611
An evaluation of swallowing function image is a diagnostic procedure. It involves capturing images of your throat as you swallow. This helps identify any issues with swallowing, which could be due to various conditions like stroke, cancer, or nerve disease.
13 services13 patients

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 Mary Meier's NPI number?

The NPI number for Mary Meier is 1932666849. It was assigned to this individual provider in the NPPES registry on February 27, 2019.

Where is Mary Meier located?

Mary Meier practices at 1860 Pennsylvania Ave Ste 305, Fairfield, CA 94533. The listed phone number is (707) 646-4333.

What is Mary Meier's specialty?

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

Is Mary Meier enrolled in Medicare?

Yes. Mary Meier 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 organizations bill Medicare for Mary Meier's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Meier reassigns Medicare benefits to 3 organizations: Northbay Healthcare Group (Fairfield, CA), Northbay Health Medical Foundation (Fairfield, CA) and Permanente Medical Group Inc (Vallejo, CA). 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 Mary Meier's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mary Meier was last updated on October 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.