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Golden Coast Rehab
La Mesa, CAMedi-Cal Welcome

Outpatient Mental Health & Addiction Treatment in San Diego

Golden Coast Rehab treats adults from a single outpatient facility in La Mesa, serving all of San Diego County. PHP and IOP as county-contracted specialty mental health care; detox, outpatient, intensive outpatient, and MAT for substance use under our DHCS certification. Medi-Cal welcome.

Call (858) 925-8589Check Your Coverage
  • Every day, 8am – 8pm
  • Confidential — HIPAA & 42 CFR Part 2
  • Adults 18+

Certified, contracted & trusted

California Department of Health Care Services

California DHCS certified

Substance use disorder certification 370254AP — detox, outpatient, intensive outpatient, and medication-assisted treatment.

County of San Diego Behavioral Health Services

County of San Diego contracted

A contracted provider of Specialty Mental Health Services for the County of San Diego, Behavioral Health Services, under County Contract 575462.

Medi-Cal

Medi-Cal welcome

All four San Diego County managed care plans — Blue Shield Promise, Community Health Group, Kaiser Permanente, and Molina. How Medi-Cal works here.

One facility, 8809 La Mesa Blvd., Suite 102, La Mesa, CA 91942 — adults 18+.

Levels of Care

Two lanes of care, one front door.

Mental health services and substance use services are provided under separate authorities, so each has its own levels of care. One call finds the right starting point — and if it turns out we are not it, we say so.

County Contracted

Specialty Mental Health PHP & IOP

Golden Coast Rehab is a contracted provider of Specialty Mental Health Services (Partial Hospitalization Program and Intensive Outpatient Program) for the County of San Diego, Behavioral Health Services, under County Contract 575462.

  • Structured day treatment (PHP) with evenings at home
  • Intensive outpatient (IOP) built around work, school, and family
  • Psychiatric care and medication management from our Medical Director
  • Individual therapy, group therapy, and skills work each week
Medi-CalAdults 18+Evenings at home
Explore PHP Explore IOP

Outpatient Detox

Medically supervised withdrawal that gets you through the physical part safely, with a direct handoff into treatment rather than a discharge to nowhere.

Medically supervisedHandoff into care
Explore Outpatient Detox

Intensive Outpatient (IOP)

Multiple group and individual sessions each week while you live at home and, in most cases, keep working. The core of substance use treatment here.

Live at homeMultiple sessions/week
Explore Intensive Outpatient (IOP)

Outpatient Program (OP)

Our lightest schedule, built for step-down and continuing care — fewer sessions a week, with the clinical relationship kept intact.

Step-downAround work & school
Explore Outpatient Program (OP)

Medication-Assisted Treatment

FDA-approved medication for opioid and alcohol use disorder, paired with counseling and behavioral therapy — the combination with the strongest evidence behind it.

Opioid & alcoholWith counseling
Explore Medication-Assisted Treatment

Detox, outpatient, intensive outpatient, and medication-assisted treatment are provided under California DHCS substance use disorder certification 370254AP. Partial hospitalization is offered only as a specialty mental health service under the county contract.

If we are not the right place, we will tell you where is.

We are outpatient only — no residential beds, no inpatient detox. When the assessment says you need a level of care we do not provide, we say so on that call and help you reach the County's Access and Crisis Line or a provider closer to you.

Talk it through

Housing support, built into treatment

2×

the odds of staying sober

In a randomized trial in the American Journal of Public Health, people who moved into structured recovery housing after treatment were about twice as likely to still be sober two years later — 69% vs 35% under usual aftercare.

Mental health moves the same way: in pooled randomized trials of homeless adults, most living with mental illness, housing meant significantly fewer hospitalizations and ER visits — and UCSF's statewide study found 44% of unhoused Californians with a psychiatric hospitalization were first hospitalized only after losing their housing.

No stable housing? We help plan it with your treatment.

Many of the adults we treat — for mental health, substance use, or both — are unhoused or in an unstable living situation. That is why housing is part of intake here:

  • ✓ Sober living partners throughout San Diego County
  • ✓ 140+ recuperative care beds through our partner network
  • ✓ Housing coordination for mental health PHP/IOP clients, not just addiction treatment
  • ✓ No charge to Medi-Cal clients — covered by carve-outs, never billed to you
Explore housing support

Your Care Team

The people you will actually see.

A small team, in one building, treating adults across both lanes of care — psychiatric, clinical, and the practical work of getting you covered and enrolled.

01

Psychiatric care

Medical Director · board-certified psychiatrist

Dr. Sanjai Mathew Thankachen provides clinical oversight of psychiatric care, medication management, and the medical side of co-occurring treatment, with an emphasis on patient safety and evidence-based practice.

02

Licensed therapy

Program Director, LMFT · licensed clinicians

Matthew Beck, a licensed Marriage and Family Therapist with more than a decade in substance use and mental health treatment, oversees clinical delivery and holds the standard of care across both programs.

03

Coverage & coordination

Admissions · Medi-Cal and county billing

Our admissions team verifies your benefits before you commit to anything, coordinates care across the mental health and substance use lanes, and refers out honestly when the assessment points somewhere else.

Client lounge at Golden Coast Rehab with sectional couch, coffee table, and refreshment area
The lounge, between sessions
Psychoeducation whiteboard and driftwood table in a Golden Coast Rehab group room
Where the skills work happens
Consultation office at Golden Coast Rehab's La Mesa facility with desks and seating area
One-on-one, in private
Meet the full team

Both Lanes, One Roof

When a mental health condition and substance use show up together.

Most places treat one and refer out the other. Golden Coast holds both authorities — county-contracted specialty mental health and DHCS-certified substance use care — so the two can be treated in the same building by the same team.

Starting from mental health

Co-Occurring Disorders

A mental health condition treated as the primary diagnosis, with the substance use addressed alongside it rather than deferred until after.

Co-occurring care

Starting from substance use

Dual Diagnosis

You came in for alcohol, opioids, or stimulants — and the anxiety, depression, or trauma underneath gets treated at the same time, not sent elsewhere.

Dual diagnosis care

What We Treat

Substances we treat

See everything we treat

Therapies

How we treat it

Explore our therapies

— Admissions

Starting here takes one call, not an application.

There is no form to wait on and no cost to find out whether we are the right fit. Four steps, most of them finished the same week.

Call (858) 925-8589See the full process

  1. The first call

    A confidential conversation about what is going on. Have your Medi-Cal or insurance card nearby if you can find it; if you cannot, your name and date of birth are usually enough to start.

  2. Coverage check

    We verify your benefits before you commit to anything. With Medi-Cal in San Diego County — any of the four plans — treatment here can be covered at no cost to you.

  3. Clinical assessment

    A clinician talks with you about symptoms, history, substance use, medications, and safety, then recommends a level of care. This is also where we tell you if we are not the right place.

  4. Start date

    If we are a fit, we schedule your first day, walk you through the schedule, and tell you exactly what to bring. Most people start within days rather than weeks.

Medi-Cal & Coverage

Medi-Cal covers your care.
No surprises.

Golden Coast Rehab is credentialed through San Diego County Behavioral Health Services, which administers specialty mental health and Drug Medi-Cal services for the whole county.

  • Any San Diego Medi-Cal planBlue Shield Promise, Community Health Group, Kaiser Permanente, or Molina — mental health and addiction treatment here runs through the County's behavioral health system, not your plan's network.
  • No cost to youIf you have Medi-Cal in San Diego County and meet clinical criteria, there is no copay, no deductible, and no bill afterward.
  • You do not need to switch plansNothing about your coverage has to change to be seen here, and you do not need to know your plan's name to start. Checking is free, confidential, and commits you to nothing.
How Medi-Cal works here

Check your coverage

Takes about a minute. Send your details and our admissions team will confirm your benefits and call you back. Free, confidential, and no obligation.

Verifying your insurance is free, 100% confidential, and carries no obligation.

Serving members of every San Diego Medi-Cal plan

Credentialed through Optum, administrator of behavioral health services for the County of San Diego.

  • Blue Shield of California Promise Health Plan logo
  • Community Health Group Partnership Plan logo
  • Kaiser Permanente logo
  • Molina Healthcare of California logo
Optum logoOptum, a UnitedHealth Group companyAdministrative Services Organization for County of San Diego behavioral health — we are credentialed with Optum.
County of San Diego Behavioral Health Services — contracted providerCounty of San Diego Behavioral Health ServicesContracted provider of Specialty Mental Health Services under County Contract 575462.

Not sure if you're covered? Verify your benefits in minutes — free & confidential.

Our Location

La Mesa, CA

Serving San Diego County, including San Diego, El Cajon, Chula Vista, Santee, Spring Valley, Lemon Grove, National City, Lakeside, Escondido, and Oceanside.

Golden Coast Rehab8809 La Mesa Blvd., Suite 102
La Mesa, CA 91942

Every day, 8am – 8pm

Call (858) 925-8589Location details

Licensed & Certified

Our licenses and certifications

Golden Coast Rehab is certified by the California Department of Health Care Services to provide substance use disorder treatment, and provides specialty mental health services under a Medi-Cal county contract.

  • Substance Use Disorder Certification

    California Department of Health Care Services (DHCS)

    Certification #: 370254AP

    Expires February 29, 2028

    Covers Detoxification, Outpatient, Intensive Outpatient, and MAT.

FAQ

Common questions

Where is Golden Coast Rehab located?
We are located at 8809 La Mesa Blvd., Suite 102, La Mesa, CA 91942, in San Diego County's East County. Call (858) 925-8589 for directions or to schedule.
What are your hours?
Every day, 8am – 8pm.
Do you accept Medi-Cal?
Yes. Golden Coast Rehab welcomes Medi-Cal, including all four San Diego County managed care plans. Specialty mental health and Drug Medi-Cal services are administered by San Diego County Behavioral Health Services, so you do not need to switch plans to be seen here. Call us and we will verify your coverage before you commit to anything.
What levels of care do you offer?
For substance use, we are certified by the California Department of Health Care Services (certification 370254AP) to provide detoxification, outpatient, intensive outpatient, and medication-assisted treatment. For mental health, we offer partial hospitalization (PHP) and intensive outpatient (IOP) as specialty mental health services under our County of San Diego contract.
Do you offer residential or inpatient treatment?
No. Golden Coast Rehab is outpatient only. If your assessment shows you need residential care or inpatient detox, we will tell you on that first call and help you reach the County's Access and Crisis Line at 1-888-724-7240 or a provider who can take you.

The hardest call you’ll ever make is also the shortest.

A few minutes on the phone with one real person, every day from 8am to 8pm. No pressure, no obligation, just honest answers about what comes next.

Call (858) 925-8589

Every day, 8am – 8pm · Free & confidential · HIPAA & 42 CFR Part 2 protected

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