Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mayumi Saiki, NP

Occupational Health Registered Nurse in Downey, CA · enumerated 2016.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1396294898

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Registry record

Entity type Individual (Type 1)

Name Mayumi Saiki

Credential NP

Sex Female

Practice address Downey, CA, 90241

Phone (562) 904-5431

Fax (562) 904-5054

Enumeration date Sep 25, 2016

Last updated in NPPES May 8, 2019

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

163WX0106X Occupational Health Registered Nurse Nursing Service Providers · License 95004609 (CA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Mayumi Saiki's NPI record?

Cross-check NPI 1396294898 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1396294898 active?

Yes, as of the latest NPPES snapshot, NPI 1396294898 is active (record last updated 2019-05-08).

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Pih Health Downey Hospital General Acute Care Hospital · Downey, CA NPI 1265433551 Michael Nguyen Anesthesiology Physician · Downey, CA NPI 1326036708 Mark Dubin Diagnostic Radiology Physician · Downey, CA NPI 1700843240 Ivan Barrett Diagnostic Radiology Physician · Downey, CA NPI 1073571113 Michael Hoffman Diagnostic Radiology Physician · Downey, CA NPI 1497713838 Julie Sun Diagnostic Radiology Physician · Downey, CA NPI 1629036819 David Wohlmuth Diagnostic Radiology Physician · Downey, CA NPI 1427016625 California Em-I Medical Services, A Medical Corporation Emergency Medicine Physician · Downey, CA NPI 1013966258

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-05-08.