NIHON BAY CLINIC
NPI 1770540858
Family Medicine in San Mateo, CA
About Nihon Bay Clinic NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NIHON BAY CLINIC (NPI 1770540858) is a healthcare organization registered as a family medicine in San Mateo, California and active in the NPI registry since May 2006. The organization holds a CLIA Waiver certificate valid through December 28, 2026 and lists Masayasu Kihira, Family Practitioner Medical Directo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Other Identifiers 2
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Nihon Bay Clinic is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Nihon Bay Clinic, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 05D1035320
Nihon Bay Clinic/Masayasu Kihira MD A Professional Corporation · San Mateo, CAFrequently 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 Masayasu Kihira MD A Professional Corporation's NPI number?
The NPI number for Masayasu Kihira MD A Professional Corporation is 1770540858. It was assigned to this organization in the NPPES registry on May 1, 2006. The provider is doing business as Nihon Bay Clinic.
Where is Masayasu Kihira MD A Professional Corporation located?
Masayasu Kihira MD A Professional Corporation is located at 40 N San Mateo Dr Nihon Bay Clinic, San Mateo, CA 94401. The listed phone number is (650) 558-0337.
What is Masayasu Kihira MD A Professional Corporation's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Masayasu Kihira MD A Professional Corporation enrolled in Medicare?
Yes. Masayasu Kihira MD A Professional Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Masayasu Kihira MD A Professional Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Family Practice) reassigns their Medicare billing to Masayasu Kihira MD A Professional Corporation. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Masayasu Kihira MD A Professional Corporation hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 05D1035320) is associated with this NPI, valid through December 28, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Masayasu Kihira MD A Professional Corporation was last updated on August 24, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Nihon Bay Clinic · NPI 1770540858
Family Medicine organization in San Mateo, California. Organization record, active in the CMS NPPES registry since May 1, 2006.
## Identity
- **NPI:** 1770540858 (Entity type: Organization)
- **Enumerated:** May 1, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **Legal business name:** Masayasu Kihira Md A Professional Corporation
- **Organization subpart:** No
- **Authorized official:** Masayasu Kihira, FAMILY PRACTITIONER MEDICAL DIRECTO
## Practice location
- **Address:** 40 N SAN MATEO DR, NIHON BAY CLINIC, San Mateo, CA 94401-2824
- **Phone:** (650) 558-0337 · **Fax:** (650) 558-9364
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Family Practice) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 24, 2010
- **Other identifiers:** Medicare UPIN G18602 (CA); Medicare PIN ZZZ30019Z (CA)
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1770540858) · Data from the CMS NPPES public registry.