NPPES file of Aug 9, 2026

Mental Health Systems, INC in Oceanside, CA

This location of Mental Health Systems bills under NPI 1598847055, an organization record issued on Oct 20, 2006 with the primary taxonomy Adult Mental Health Clinic/Center. It is one of 52 NPIs registered under this name and one of 4 in Oceanside; each clinician who sees you there has their own NPI and license.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

Organization recordNPPES, Aug 2026
1598847055
Legal name
Mental Health Systems, INC
Entity
Type 2 · organization
Primary taxonomy
Adult Mental Health Clinic/Center 261QM0850X
Practice location
1701 MISSION AVE STE 230, Oceanside, CA 92058
Phone
760-712-3535
Mailing address
San Diego, CA
Enumerated
Oct 20, 2006
Record updated
Jul 24, 2026
Authorized official
President/Ceo (title as filed)
Public record from the NPPES NPI Registry (open it on CMS). An NPI identifies who bills; it is not a facility license.

The other 3 Oceanside NPIs

  1. Mental Health Systems, INC1100 SPORTFISHER DR · issued Mar 1, 20071023146826
  2. Mental Health Systems, INC2122 S EL CAMINO REAL STE 102 · issued Aug 17, 20171649796012
  3. Mental Health Systems, INC1701 MISSION AVE STE 120 · issued Jun 25, 20261962328880

8 clinicians CMS lists with Mental Health Systems in Oceanside

  1. Kat Balingit, PSYCHIATRIC NPPsychiatric/Mental Health Nurse Practitioner1538790605
  2. John Donnelly, MDPsychiatry Physician1760566160
  3. Jason Keri, MDGeriatric Psychiatry Physician1811915812
  4. Chung-Lim Kim, MDPsychiatry Physician1033361720
  5. Julie Marhefka, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1699077123
  6. Margo Randolph, MSW, LCSWClinical Social Worker1306143441
  7. Rachel Ross, MDPsychiatry Physician1316248420
  8. Alison Trexler, MDPsychiatry Physician1003104704

Source: CMS Doctors and Clinicians group affiliations, matched by practice name and city.

All 52 Mental Health Systems NPIs

Every location registered under this name, in 15 cities.

See every location

Checking an organization

  1. Confirm the business with the California secretary of state.
  2. Check the HHS-OIG exclusion list for the organization.
  3. Verify each clinician on their own record and the state license search.

Common questions

Is an organization NPI a license?

No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.

Which Oceanside NPI should I use?

Ask the office which NPI it bills under; all 4 Oceanside NPIs are registered under the same name.

Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.