Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marilyn May, M.S.

Counselor in San Leandro, CA · enumerated 2012.

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

National Provider Identifier

1104178011

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Marilyn May

Credential M.S.

Sex Female

Practice address 14895 E 14th St, Suite 280, San Leandro, CA, 94578

Phone (510) 957-5465

Enumeration date Oct 3, 2012

Last updated in NPPES Dec 15, 2016

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers Primary

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Marilyn May?

Marilyn May is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Western Dental Services, Inc. General Practice Dentistry · San Leandro, CA NPI 1720287352 Innovative Pathways Inc. Community/Behavioral Health Agency · San Leandro, CA NPI 1407000896 Alexander Kogan Dentist · San Leandro, CA NPI 1275947160 Felton Institute Community/Behavioral Health Agency · San Leandro, CA NPI 1346636040 Edward Esperante Behavior Analyst · San Leandro, CA NPI 1306210240 Courtney Bauarschi Behavior Analyst · San Leandro, CA NPI 1366809782 Ashley Ferguson Assistant Behavior Analyst · San Leandro, CA NPI 1912442195 Nung Saechao Behavior Analyst · San Leandro, CA NPI 1669974226

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-12-15.