Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Lois To
Registered Nurse in Sunnyvale, CA · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1982020855
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Registry record
Entity type Individual (Type 1)
Name Lois To
Sex Female
Practice address 660 S Fair Oaks Ave, Sunnyvale, CA, 94086
Phone (408) 992-4928
Enumeration date Mar 14, 2014
Last updated in NPPES Mar 14, 2014
Taxonomy & licenses
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.
Frequently asked questions
Where does Lois To practice?
The practice location on file with NPPES is in Sunnyvale, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Lois To?
The National Provider Identifier (NPI) for Lois To is 1982020855, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Jeff Svoboda Psychiatry Physician · Sunnyvale, CA NPI 1497748750 County of Santa Clara Federally Qualified Health Center (FQHC) · Sunnyvale, CA NPI 1528053139 Nirmala Bhat Obstetrics & Gynecology Physician · Sunnyvale, CA NPI 1528031051 Peter Fay Internal Medicine Physician · Sunnyvale, CA NPI 1154384337 Maria Jiao Pediatrics Physician · Sunnyvale, CA NPI 1760445480 Catherine Nelson Pediatrics Physician · Sunnyvale, CA NPI 1871509018 County of Santa Clara Mental Health Clinic/Center (Including Community Mental Health Center) · Sunnyvale, CA NPI 1386754869 Karen Wang Pediatrics Physician · Sunnyvale, CA NPI 1447324918
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-03-14.