Psychiatry Billing Services in California

Psychiatry billing is decided in the details of a single session. The same fifty minutes with the same patient can be coded several ways — a diagnostic evaluation, an office visit with a psychotherapy add-on, or psychotherapy on its own — and only one of them matches what actually happened and what the chart supports. Choose the wrong structure, or document it loosely, and the claim denies or pays less than the work was worth — repeated across a full panel, month after month, that becomes a revenue problem.

Fastora Medical Billing Solutions handles billing for psychiatry practices across California, from solo prescribers to multi-site groups. This page explains where psychiatric claims actually break down: the session-coding decisions, authorization-heavy services like TMS and Spravato, telepsychiatry’s payer-by-payer rules, and the problem specific to this state — Medi-Cal’s split between managed care plans and county mental health plans, which decides where a claim goes before anyone looks at how it is coded.

Where psychiatry claims go wrong

The intake decision: 90792, or an E/M code with an add-on. A psychiatrist’s new-patient evaluation is usually billed as 90792 — the psychiatric diagnostic evaluation with medical services — because the session is built around diagnosis, medical assessment, and a treatment plan. Many follow-up visits, though, are two services in one appointment: medication management, plus a distinct block of psychotherapy. Those are billed as an office visit (99212–99214 covers most established-patient work) plus a psychotherapy add-on: 90833 for roughly 16–30 minutes, 90836 for 38–47 minutes, 90838 for 53 minutes or more. Neither structure is “better.” The right one matches the session that actually took place — and practices lose money in both directions, billing 90792 out of habit for medication-focused visits, or stacking an add-on onto a session the note does not support.

Time that gets counted twice. The add-on codes pay only for psychotherapy time that is separate from the time spent on the E/M service; the same minutes cannot do both jobs. Charts that record one total time for the visit, or describe a single blended conversation covering medication and therapy together, come back denied or downcoded. What holds up: a note that separates the two — medical work and its complexity on one side; therapy time, with a start and stop or a clear time statement, on the other; diagnoses consistent across both codes.

TMS and Spravato: the authorization is half the service. Transcranial magnetic stimulation and esketamine (Spravato) are where psychiatry billing meets its heaviest administrative load. Payers generally require prior authorization supported by a documented treatment history — medication trials and their outcomes, standardized symptom scores, and why standard treatment has been insufficient — and they revisit medical necessity across a treatment series, not just at the start. Per-session documentation then has to match what was authorized: session parameters and progress measures for TMS; for Spravato — a drug commonly billed under the medical benefit — administration and the required post-dose observation period in a certified treatment setting. A gap anywhere — an authorization that lapsed mid-series, a session note that does not match the approved plan — denies care that was clinically right and already delivered.

Telepsychiatry rules change from payer to payer. A video visit that pays cleanly under one plan can deny under another over the place-of-service code — POS 10 when the patient is at home, POS 02 for other telehealth settings — the modifier the plan wants, or whether it covers audio-only visits at all. Medicare, commercial plans, and Medicaid managed care plans each maintain their own telehealth lists and revise them often — so the coding has to be re-verified plan by plan as policies shift.

What is actually different about billing in California

California Medicaid is Medi-Cal, administered by the Department of Health Care Services (DHCS). What makes Medi-Cal unusual — and what trips up psychiatry practices more than any CPT question — is that behavioral health coverage is split in two. Depending on the type of service, that care is covered either through the member’s Medi-Cal managed care plan or through a county mental health plan. Specialty mental health services sit on the county side of that split; many other behavioral health services fall to the managed care plan.

Get the routing wrong and the claim denies as some other plan’s responsibility — sometimes after the window to redirect it has begun to close. The split also means enrollment and credentialing have to be checked on both sides: being set up with a patient’s managed care plan says nothing about the county plan, and a practice expanding into Medi-Cal specialty services can find its claims aimed at an entity it has no relationship with. Our page on medical billing services in California walks through the statewide picture; the short version for psychiatrists is that eligibility verification has to answer a second question — not just “is this patient covered?” but “covered by which plan, for this service?” The same two-door structure shapes behavioral health billing across California, and it is the first thing we check when a practice’s Medi-Cal claims are underperforming.

How Fastora works a psychiatry practice’s billing

Psychiatry is one of our core specialties nationally — our psychiatry billing services page covers the specialty in full — and the work is organized around the failure points above:

• Credentialing and enrollment for psychiatrists. Payer enrollment kept current for individual prescribers and groups — CAQH data, revalidations, plan-by-plan status — including standing on both sides of Medi-Cal, managed care and county, before claims go out under a new arrangement.
• Authorization management. TMS courses, Spravato sessions, and other authorization-dependent services are tracked against their approvals, with re-authorization started before a series lapses — not discovered from a denial afterward.
• Coding and charge review. Session coding is checked against the note before submission: 90792 versus E/M-plus-add-on, therapy time kept separate, the E/M level supported by the medical decision-making, and the telehealth place-of-service and modifiers each plan currently requires.
• Denial management and appeals. Denials are worked by reason — rebilled to the correct plan when routing was the error, appealed with documentation when medical necessity is challenged. Wrong-door Medi-Cal denials are time-sensitive and worked first.
• Accounts receivable follow-up. Aged claims are followed up by payer and age, so a plan’s slow-payment pattern shows up in weeks, not at year-end.

Psychiatry billing here is backed by 5+ years of medical billing experience, 50+ active clients, and 100+ satisfied MDs. Pricing takes one of two forms — a percentage of collections or a flat monthly fee — set around each practice’s mix of commercial, Medi-Cal, and county-plan work.

Psychiatry practices across California

We support psychiatry practices throughout the state — Los Angeles, Orange County, San Diego, the Bay Area, Sacramento, the Inland Empire — including telepsychiatry-heavy and hybrid practices. The pattern is the same whatever the payer mix: money is lost in coding choices, authorization lapses, and routing, and all three are fixable.

Frequently asked questions

Should an intake be billed as 90792 or as an E/M code with a psychotherapy add-on?

90792 describes a diagnostic evaluation with medical services — the typical psychiatrist’s intake: assessment, medical judgment, treatment planning. An E/M code plus a 90833, 90836, or 90838 add-on describes a visit where a medical service and a distinct period of psychotherapy both occurred — more often the shape of a follow-up visit. Bill the structure that matches the session and the note — using one pattern for every appointment misstates a share of them, and payers notice patterns even when individual claims pay.

Why do our psychotherapy add-on claims keep denying, or paying at the lowest level?

The usual cause is time: the add-on requires psychotherapy time separate from the E/M service, at or above the code’s threshold — 16 minutes minimum for 90833 — and the note has to show it. Single total-time statements, therapy time overlapping the medication discussion, and unsupported E/M levels are the repeat offenders. Reviewing one month’s session notes usually identifies which is costing you.

A Medi-Cal claim denied saying the service is not that plan’s responsibility. What happened?

Most likely, the claim went to the wrong side of Medi-Cal’s behavioral health split: services are divided between the member’s managed care plan and the county mental health plan, with specialty mental health services handled through the county plans. A claim sent to the wrong one denies as not that plan’s responsibility. Rebill the responsible plan promptly — timely filing clocks keep running — and build the routing question into eligibility verification so it stops recurring.

What does a payer expect before authorizing TMS?

Documentation that standard treatment has been tried and fallen short: medication history and outcomes, symptom severity on a standardized scale, and the clinical reasoning for TMS. Payers apply their own medical-necessity criteria and typically authorize a defined course, then review again before extending it. Practices that avoid mid-series denials write their intake and progress documentation with those criteria in mind from the first visit.

Do telepsychiatry visits bill the same as in-person visits?

The session coding is the same; the claim details around it are not. Place of service — 10 when the patient is at home, 02 for other telehealth locations — the modifier each plan requires, and audio-only coverage all vary by payer and change over time. We verify each plan’s current rules rather than assuming last quarter’s coding still applies.

How much do your services cost — and can you take over only part of our billing?

Fastora charges either a percentage of collections or a flat monthly fee. And yes — some practices keep claim submission in-house and hand us what falls behind: authorization tracking, credentialing upkeep, denial work. The free billing audit shows which parts those are for your practice.

Start with a free billing audit

If your California psychiatry practice is losing revenue to add-on denials, authorization lapses, or Medi-Cal claims bouncing between plans, start with a free initial billing audit. We review how your claims are performing, identify the preventable losses, and lay out what fixing them takes — no obligation. Request your free initial billing audit and we will take it from there.