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MRS. LOIS LIN CHEN MS, CCC-SLP
NPI 1831680982
Speech-Language Pathologist in San Francisco, CA

Active since May 24, 2018Accepts Medicare Assignment
2340 CLAY ST FL 5, SAN FRANCISCO, CA 94115(415) 600-0151(415) 366-7559 Get Directions Write a Review

NPPES record last updated: August 25, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mrs. Lois Lin Chen Ms, Ccc-slp NPPES

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

MRS. LOIS LIN CHEN MS, CCC-SLP (NPI 1831680982) is an individual speech-language pathologist provider in San Francisco, California, licensed in California (24460) and active in the NPI registry since May 2018. She is a graduate of Other (2015).

NPPES Registry Identity

NPI1831680982
Entity TypeIndividualFemale
Primary Taxonomy235Z00000X
Provider Legal NameMRS. LOIS LIN CHENCredential: MS, CCC-SLP
Location Address2340 CLAY ST FL 5San Francisco, CA 94115-1932
Mailing AddressPo Box 276950Sacramento, CA 95827-6950 · (415) 600-0151 · Fax (415) 366-7559
Phone(415) 600-0151
Fax(415) 366-7559
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateMay 24, 2018
Last NPPES UpdateAugust 25, 2025
NPPES CertifiedAugust 25, 2025
✔ NPI 1831680982 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 · 24460
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.
2340 CLAY ST FL 5, San Francisco, CA 94115
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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

Mrs. Lois Lin Chen Ms, Ccc-slp 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 ID9133647555
PECOS Enrollment IDI20250519002662

Medicare Billing Reassignment

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

Sutter Bay Medical Foundation
15 mi
Multi-Specialty
12 CAMINO ENCINAS
Orinda, CA 94563
  • Reassigned Medicare billing, California enrollment
  • 4,479 clinicians in this Medicare group
NPI 1366898538 (510) 204-8180

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 8

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

PATRICK CARPENTER
Otolaryngology (Plastic Surgery within the Head & Neck)
2340 CLAY ST FL 5
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-0151
DR. WILLIAM RUSSELL RYAN M.D.
Otolaryngology (Plastic Surgery within the Head & Neck)
2340 CLAY ST FL 5
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-3073
WILLIAM TYSON BUIS
Nurse Practitioner (Family)
2340 CLAY ST FL 5
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-0151
CRAIG M. ELDRIDGE PA-C
Physician Assistant
2340 CLAY ST FL 5
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-0151
DR. KATHERINE C YUNG M.D.
Otolaryngology (Otolaryngology/Facial Plastic Surgery)
2340 CLAY ST FL 5
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-0151
MS. LAUREN TAYLOR KIM PHYSICIAN ASSISTANT
Physician Assistant (Surgical)
2340 CLAY ST FL 5
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-0151
DR. JON DANIEL WENDER MD
Ophthalmology
2340 CLAY ST FL 5
SAN FRANCISCO, CA 94115
San Francisco County (415) 600-3901
DR. ZOE HELOISE FULLERTON MD
Otolaryngology
2340 CLAY ST FL 5
SAN FRANCISCO, CA 94115
San Francisco County (415) 366-7559

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 Lois Chen's NPI number?

The NPI number for Lois Chen is 1831680982. It was assigned to this individual provider in the NPPES registry on May 24, 2018.

Where is Lois Chen located?

Lois Chen practices at 2340 Clay St Fl 5, San Francisco, CA 94115. The listed phone number is (415) 600-0151.

What is Lois Chen's specialty?

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

Is Lois Chen enrolled in Medicare?

Yes. Lois Chen 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 Lois Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lois Chen reassigns Medicare benefits to Sutter Bay Medical Foundation (Orinda, CA). 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 Lois Chen'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 Lois Chen was last updated on August 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.