Mark Oliveras
NPI 1851221527 · Marriage & Family Therapist · Belleville, IL
Mark Oliveras is a Marriage & Family Therapist provider in Belleville, IL (NPI 1851221527).
Provider details
- NPI number
- 1851221527
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 166.012230 (IL)
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
Under 1 yr in 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
Mailing address
Registry dates
- Enumerated
- 2026-05-22
- Last updated
- 2026-05-22
- Certified
- 2026-05-11
Frequently asked questions
- What is Mark Oliveras's NPI number?
- Mark Oliveras's National Provider Identifier (NPI) is 1851221527, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Oliveras's specialty?
- Mark Oliveras is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Mark Oliveras located?
- Mark Oliveras's practice location on file with NPPES is 2810 Frank Scott Pkwy W Ste 812, Belleville, IL 62223-5007.
- What is Mark Oliveras's phone number?
- The practice phone number listed in the NPPES registry for Mark Oliveras is (888) 277-4028.
- Is Mark Oliveras's NPI active?
- Yes — Mark Oliveras's NPI (1851221527) is active in the NPPES registry as of the last update on 2026-05-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.