IndividualActive
Marcelyn Billy
NPI 1538840939 · Social Worker · Oceanside, CA
Marcelyn Billy is a Social Worker provider in Oceanside, CA (NPI 1538840939).
Provider details
- NPI number
- 1538840939
- Entity type
- Individual
- Primary specialty
- Social WorkerBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- ASW110331 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(58/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
1816 Portofino Dr
Oceanside, CA 92054-6130
Phone: (760) 433-6361
Street-level locationGet directions
Mailing address
1519 Pepperwood Way
Oceanside, CA 92056-5495
Registry dates
- Enumerated
- 2023-07-27
- Last updated
- 2025-10-15
- Certified
- 2025-10-15
Frequently asked questions
- What is Marcelyn Billy's NPI number?
- Marcelyn Billy's National Provider Identifier (NPI) is 1538840939, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcelyn Billy's specialty?
- Marcelyn Billy is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Marcelyn Billy located?
- Marcelyn Billy's practice location on file with NPPES is 1816 Portofino Dr, Oceanside, CA 92054-6130.
- What is Marcelyn Billy's phone number?
- The practice phone number listed in the NPPES registry for Marcelyn Billy is (760) 433-6361.
- Is Marcelyn Billy's NPI active?
- Yes — Marcelyn Billy's NPI (1538840939) is active in the NPPES registry as of the last update on 2025-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.