Mark Oliveras
Marriage & Family Therapist · Belleville, IL
Mark Oliveras is a marriage & family therapist with a practice address in Belleville, Illinois, and NPI 1851221527, issued on May 22, 2026. Check the license (Illinois 166.012230, as entered in NPPES) with the Illinois board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Oliveras
- Primary taxonomy
- Marriage & Family Therapist 106H00000X
- License number
- 166.012230 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2810 Frank Scott Pkwy W Ste 812, Belleville, IL 62223
- Phone
- (888) 277-4028
- Enumerated
- May 22, 2026
- Record last updated
- May 22, 2026
- Entity
- Type 1 · individual
8 nearest marriage & family therapist records → All 1,328 in Illinois → Look up another NPI →
Verify Mark Oliveras in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 166.012230Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Oliveras among 1,328 marriage & family therapist records in Illinois
Mark Oliveras is one of 1,328 marriage & family therapist records with a practice address in Illinois. 4% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2026, is newer than 97% of them.
- NPI issued2026 · 97% of these records are older, 0% newer
- In a Medicare fileNo · 4% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2026 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 106H00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Marriage & Family Therapist providers in Illinois
There are 1,328 marriage & family therapist records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,328 in Illinois → Every provider in Belleville → Marriage & Family Therapist nationwide →
The 8 marriage & family therapist records with the nearest ZIP codes
- Vivian Sierra, PH.D. LMFTBelleville, IL 622231639199854
- Mark Wiesner, LMFTBelleville, IL 622231568013613
- Allison CugierShiloh, IL 622211760166870
- Thomas Posnanski, LMFTBelleville, IL 622211134209133
- Melissa Wickes, MA, LCPCBelleville, IL 622211437599149
- Marti Baricevic, LCPCBelleville, IL 622201821496647
- Jamie Benson, LMFTSwansea, IL 622261831560127
- Amy Donathan, LMFTSwansea, IL 622261366931917
Common questions
What is Mark Oliveras's NPI number?
Mark Oliveras's National Provider Identifier (NPI) is 1851221527, issued on May 22, 2026. An NPI identifies a provider in billing; it is not a license.
Where is Mark Oliveras located?
The NPPES record lists a practice address at 2810 Frank Scott Pkwy W Ste 812, Belleville, IL, 62223. Phone: (888) 277-4028. Providers update this record themselves, so call before visiting.
How can I verify Mark Oliveras's license?
NPPES lists Illinois license number 166.012230, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.