Marissa O'Neill
NPI 1255056651 · Day Training/Habilitation Specialist · Pittsburg, CA
Marissa O'Neill is a Day Training/Habilitation Specialist provider in Pittsburg, CA (NPI 1255056651).
Provider details
- NPI number
- 1255056651
- Entity type
- Individual
- Primary specialty
- Day Training/Habilitation SpecialistNursing Service Related Providers
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Nursing Service Related Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
83% 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
Mailing address
Registry dates
- Enumerated
- 2022-10-07
- Last updated
- 2025-07-17
- Certified
- 2025-06-18
Frequently asked questions
- What is Marissa O'Neill's NPI number?
- Marissa O'Neill's National Provider Identifier (NPI) is 1255056651, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa O'Neill's specialty?
- Marissa O'Neill is listed in the NPPES registry with a primary specialty of Day Training/Habilitation Specialist (Nursing Service Related Providers).
- Where is Marissa O'Neill located?
- Marissa O'Neill's practice location on file with NPPES is 2311 Loveridge Rd, Pittsburg, CA 94565-5117.
- What is Marissa O'Neill's phone number?
- The practice phone number listed in the NPPES registry for Marissa O'Neill is (925) 431-2632.
- Is Marissa O'Neill's NPI active?
- Yes — Marissa O'Neill's NPI (1255056651) is active in the NPPES registry as of the last update on 2025-07-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.