California · Behavioral Health Billing

Medi-Cal doesn't run one billing system. It runs 58.

Every county runs its own Mental Health Plan, on top of a separate managed-care track for mild-to-moderate care. That split not the state's size is what drives most of your denials. We bill for California behavioral health practices remotely, working the rules the way California actually wrote them.

No local office required — the rules we work from are the state's, not ours.

One Medi-Cal member, two possible payers
Medi-Cal Member County MHP Specialty · SMI / SED Managed Care Plan Mild-to-moderate Short-Doyle · T2021 / T2024 Standard CPT · 90837
Wrong guessCARC 109 not covered by this payer, because for that member, that day, it wasn't.
Right routingConfirmed by level of need before the claim ever goes out.
Healthcare Landscape

Two Medicaid systems. One member.

Since 2014, Medi-Cal has split behavioral health between counties and managed care plans, with a third track for substance use. Nothing on a claim tells you which one to bill level of need does.

Fee-for-service · 58 total

County Mental Health Plan

Handles specialty care serious mental illness, serious emotional disturbance, and higher levels of care. One per county, overseen by DHCS.

HandlesSpecialty / SMI / SED
RegulatorCounty + DHCS
Capitated · via MBHO

Medi-Cal Managed Care Plan

Handles mild-to-moderate mental health, often subcontracted to a Managed Behavioral Health Organization.

HandlesMild-to-moderate
RegulatorDHCS, DMHC / CDI
Payer mixKaiser and Blue Shield lead commercial; Anthem, Health Net, Molina, L.A. Care vary by county's Medi-Cal roster.
Regulatory splitHMOs answer to DMHC under Knox-Keene; PPOs fall under the Department of Insurance.
GeographyPsychiatry clusters in the Bay Area and Southern California; the San Joaquin Valley and Inland Empire run at roughly half the density.
Where Claims Break

Four patterns behind most of the write-offs

Almost every avoidable denial we see in California behavioral health billing traces back to one of these.

01

MHP-vs-MCP misrouting

Send a specialty claim to the health plan, or a mild-to-moderate claim to the county, and it bounces back CARC 109 not covered by this payer, because for that member, on that day, it genuinely wasn't.

02

Level-of-care denials

SB 855, in effect since 2021, requires plans to use clinical criteria consistent with generally accepted standards of care a direct response to Wit v. United Behavioral Health. That's real appeal language for PHP, IOP, and residential claims, if the appeal cites the right standard.

03

Coding that isn't just CPT

A county MHP claim is often billed in Short-Doyle format time-based codes like T2021 or T2024 while the same service billed to an MCP uses ordinary codes like 90837. Miscoding between formats is a leading reason county claims bounce.

04

Credentialing that never quite finishes

DHCS's PAVE portal (60–120 days) is only step one. Billing still needs separate enrollment with every managed care plan in the county, and again with Drug Medi-Cal for SUD.

How We Solve It

Routing handled before the claim goes out not after the denial

We treat routing as a front-of-process problem, not an appeals problem, and staff every account with people fluent in both coding systems.

Routing confirmed up front

We confirm, before a claim goes out, whether a member's level of need puts the service with the county MHP or the MCP because guessing produces the CARC 109s.

Dual-format coding

Coding is handled by staff fluent in both standard CPT and Short-Doyle time-based coding, converted correctly the first time.

Appeals that cite the standard

When a level-of-care denial lands, our appeals cite the exact clinical-criteria standard SB 855 requires the plan to use not a generic reconsideration request.

Two-track credentialing

We run the state PAVE application and per-plan enrollment with each managed care plan in the county at the same time, so a new location isn't left unbillable.

Services

End-to-end billing, built for California's split

Every service below is run with the county-vs-MCP distinction as a first-class input, not an afterthought.

Eligibility Verification

Confirming, before the first session, which system county or MCP is financially responsible, not just whether coverage is active.

Medical Coding

Certified coders choosing between standard psychiatric CPT codes (90791, 90832/34/37, 90846/47) and county Short-Doyle equivalents.

Claims Management

837P submission built around each payer's edits an MCP's commercial-style adjudication or a county MHP's encounter-based reporting.

Denial Appeals

Traced to the actual cause routing, authorization, or level-of-care and appealed with the clinical standard California law requires the plan to use.

Payment Posting

Reconciling MHP fee-for-service payments, MCP arrangements, and commercial EOBs into one clear picture of what a practice collected.

Credentialing

Managing PAVE enrollment, county-by-county managed care applications, and Drug Medi-Cal enrollment for SUD programs, in parallel.

AR Follow-Up

Chasing aging balances against each payer's real timeline including the tighter 30-calendar-day standard California adopted for 2026.

Specialties

Billing built around each level of care

Behavioral health billing isn't one specialty it's several, each with its own rules, litigation history, and documentation standard.

Psychiatry & PMHNP

California trained a record 239 first-year psychiatry residents in 2025 still far short of the 527 a year state workforce planners say is needed, pushing more practices toward PMHNPs.

PHP & IOP Programs

Sit closest to the SB 855 / Wit v. United Behavioral Health line challenged on medical necessity more than almost any other service, where correctly-cited criteria matter most.

Residential Treatment (RTC)

Works in the shadow of Rea v. Blue Shield of California (2014), which required parity-act coverage of medically necessary residential care still the reference point in RTC disputes.

Inpatient Psychiatric

Regularly involves holds under the Lanterman-Petris-Short Act — the 72-hour "5150" and 14-day "5250" which still generate ordinary claims requiring documentation that supports medical necessity.

Detox & SUD / Withdrawal Management

Runs through Drug Medi-Cal or DMC-ODS depending on the county, with ASAM criteria driving authorization and appeals alike.

Psychology & Group Practice

California isn't a PSYPACT state a psychologist treating a California patient by video needs a full California license, no compact shortcut, regardless of where the practice is based.

Revenue Cycle Management

The process, in order

Clean revenue cycle starts before the appointment and doesn't stop until a claim is paid.

Verify eligibility at the benefit level

Not just active or inactive which system owns the visit.

Confirm authorization

Where required, before the service is delivered.

Submit a clean 837P

Coded correctly for that specific payer Short-Doyle or standard CPT.

Start denial work immediately

No claim sits waiting for someone to notice it bounced.

30

AB 3275, effective January 1, 2026: every California health plan and insurer HMOs and Medi-Cal managed care included must pay, contest, or deny a claim within 30 calendar days, replacing the old, uneven 30- and 45-working-day standards, with automatic interest owed on anything late. We track receipt dates against that clock, county by county.

Why Outsource

One departure shouldn't be able to stall a county's worth of claims

California's behavioral health workforce shortage isn't limited to clinicians it reaches billing staff who know Short-Doyle from standard CPT, or which county plan a claim belongs to. That expertise is costly to hire and hard to keep.

  • Turns single-person dependency into a service that scales into a new county
  • Narrows exposure on missed SB 855 appeal language
  • Keeps telehealth documentation and modifiers current as rules change
  • Prevents lapsed PAVE revalidations from stalling billing
  • Steadier collections, with clinicians spending time with patients not a provider portal
Frequently Asked Questions

Straight answers on how California billing actually works

How do I know if a Medi-Cal claim should go to the county or the managed care plan?
It depends on assessed level of need, not habit: specialty conditions stay with the county MHP, mild-to-moderate conditions route to the MCP. We verify this before the visit, not after a CARC 109 denial.
What changed with AB 3275?
As of January 1, 2026, every California health plan and insurer Medi-Cal managed care and HMOs included must pay, contest, or deny a claim within 30 calendar days, with automatic interest on late payments.
What's the difference between CPT billing and Short-Doyle billing?
Short-Doyle is California's county-run Medi-Cal specialty mental health billing, named for the 1957 act that built the county-state financing structure, often using time-based codes like T2021 or T2024 instead of standard CPT.
How does SB 855 affect our denial appeals?
It requires California plans to use clinical criteria consistent with generally accepted standards of care for MH/SUD level-of-care decisions naming the exact criteria from the Wit v. United Behavioral Health litigation strengthens an appeal.
How long does credentialing take, and do we need separate enrollments per county?
DHCS's PAVE portal typically runs 60 to 120 days, and that's only step one enrollment with each county's managed care plans, and separately with Drug Medi-Cal for SUD, still follows.
What are the telehealth billing rules for behavioral health here?
SMHS, Drug Medi-Cal, and DMC-ODS claims need specific telehealth modifiers, parity applies statewide, and since January 2024 telehealth practices must also preserve the member's right to an in-person visit.

Let's look at your California claims

If Medi-Cal's two-system split, a county's Short-Doyle rules, or a level-of-care denial is costing your practice time or revenue, we're glad to take a look.