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MARCELYN OPAL BILLY
NPI 1538840939
Social Worker in Oceanside, CA

Active since July 27, 2023
1816 PORTOFINO DR, OCEANSIDE, CA 92054(760) 433-6361 Get Directions Write a Review

NPPES record last updated: October 15, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Marcelyn Opal Billy NPPES

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

MARCELYN OPAL BILLY (NPI 1538840939) is an individual social worker in Oceanside, California, licensed in California (ASW110331) and active in the NPI registry since July 2023.

NPPES Registry Identity

NPI1538840939
Entity TypeIndividualFemale
Primary Taxonomy104100000X
Provider Legal NameMARCELYN OPAL BILLY
Location Address1816 PORTOFINO DROceanside, CA 92054-6130
Mailing Address1519 Pepperwood WayOceanside, CA 92056-5495 · (914) 714-8453
Phone(760) 433-6361
Sole ProprietorYes
Enumeration DateJuly 27, 2023
Last NPPES UpdateOctober 15, 2025
NPPES CertifiedOctober 15, 2025
✔ NPI 1538840939 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
License✔ Licensed in CA · ASW110331
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
1816 PORTOFINO DR, Oceanside, CA 92054
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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.

BEVERLY BOONE
Counselor (Mental Health)
1816 PORTOFINO DR
OCEANSIDE, CA 92054
San Diego County (760) 433-6361
KELLY FAITH LYLES
Social Worker
1816 PORTOFINO DR
OCEANSIDE, CA 92054
San Diego County (760) 433-6361
TINA MARIE JAWORSKI
Social Worker (Clinical)
1816 PORTOFINO DR
OCEANSIDE, CA 92054
San Diego County (760) 622-1809
MILESTONE HOUSE
Clinic/Center (Adolescent and Children Mental Health)
1816 PORTOFINO DR
OCEANSIDE, CA 92054
San Diego County (760) 433-6361
JOELY WIGGINS
Marriage & Family Therapist
1816 PORTOFINO DR
OCEANSIDE, CA 92054
San Diego County (760) 433-6361
FELISHA ANN HAMPTON M.A.
Rehabilitation Practitioner
1816 PORTOFINO DR
OCEANSIDE, CA 92054
San Diego County (760) 433-6361
KAYLEIGH COLE MS
Rehabilitation Practitioner
1816 PORTOFINO DR
OCEANSIDE, CA 92054
San Diego County (760) 433-6361
MS. MICHELLE CECILIA ZAMBRANA
Case Manager/Care Coordinator
1816 PORTOFINO DR
OCEANSIDE, CA 92054
San Diego County (760) 529-7402

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 Marcelyn Billy's NPI number?

The NPI number for Marcelyn Billy is 1538840939. It was assigned to this individual provider in the NPPES registry on July 27, 2023.

Where is Marcelyn Billy located?

Marcelyn Billy practices at 1816 Portofino Dr, Oceanside, CA 92054. The listed phone number is (760) 433-6361.

What is Marcelyn Billy's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

When was this NPI record last updated?

The NPPES record for Marcelyn Billy was last updated on October 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.