Maritza Osterday
NPI 1326446931 · Addiction (Substance Use Disorder) Counselor · Fairfield, CA
Maritza Osterday is a Addiction (Substance Use Disorder) Counselor provider in Fairfield, CA (NPI 1326446931).
Provider details
- NPI number
- 1326446931
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 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
- 2014-12-12
- Last updated
- 2014-12-12
Frequently asked questions
- What is Maritza Osterday's NPI number?
- Maritza Osterday's National Provider Identifier (NPI) is 1326446931, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maritza Osterday's specialty?
- Maritza Osterday is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Maritza Osterday located?
- Maritza Osterday's practice location on file with NPPES is 1735 Enterprise Dr, Fairfield, CA 94533-6822.
- What is Maritza Osterday's phone number?
- The practice phone number listed in the NPPES registry for Maritza Osterday is (707) 425-1799.
- Is Maritza Osterday's NPI active?
- Yes — Maritza Osterday's NPI (1326446931) is active in the NPPES registry as of the last update on 2014-12-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.