When attorneys talk about California medical malpractice, the conversation reaches the MICRA noneconomic cap within about two sentences. The 2023 schedule under AB 35 — the step increases that replaced the frozen $250,000 figure — matters at the end of a case. But most med-mal files never reach a damages question. They turn on the one-year limitations clock, the 90-day notice letter, and whether an expert declaration survives a reply brief. These are the rulings that decide whether your client gets a trial at all.
The procedural side of med-mal is where plaintiff counsel lose cases they should win, and where the defense bar spends its summary judgment budget. None of it is in the MICRA statute. It sits in Code of Civil Procedure sections 340.5, 364, and 365, in the arbitration provisions of section 1295, and in two decades of appellate law policing the content of expert declarations. Here is what controls, and where the traps are.
The 90-Day Notice Under CCP 364 Is Not Jurisdictional
Section 364(a) requires a plaintiff to serve notice of intent to sue "at least 90 days" before filing a professional negligence action against a health care provider. The notice must state the legal basis of the claim and the type of loss. The instinct among newer practitioners is to treat this as a filing prerequisite — miss it, lose the case. That reading is wrong, and reading it wrong is how defendants win motions they are not entitled to.
Section 365 settles the point: failure to comply with section 364 "shall not invalidate any proceedings of any court." The remedy for a defective or absent notice is State Bar discipline against the attorney, not dismissal of the client's claim. A defendant who demurs or moves to dismiss on the ground that no 364 notice issued is asking the court for relief the Legislature expressly withheld. California courts have consistently declined to treat the notice as a condition of the court's power to hear the case.
That does not make the notice harmless. The consequences of section 364 run through the limitations statute, not through the merits — and that is where the real exposure lives.
How Section 364(d) Moves the Limitations Date
Section 340.5 gives a med-mal plaintiff the shorter of one year from discovery or three years from injury. Section 364(d) interacts with that clock in a way that has trapped a generation of plaintiff lawyers. If the 90-day notice is served within the last 90 days of the one-year limitations period, the period is extended 90 days from the date of service of the notice.
The governing authority is Woods v. Young (1991) 53 Cal.3d 315. The Supreme Court reconciled the apparent conflict between the requirement to wait 90 days before filing and the running of the one-year limit: when the notice goes out in that final 90-day window, the plaintiff gets a 90-day extension measured from service. The practical effect is that a notice served on day 360 does not force the plaintiff to file within five days — it buys 90 days from the service date. But a notice served earlier, outside that last 90-day window, grants no extension at all. The timing of the letter is the whole game.
The failure mode is predictable. Counsel sends the 364 notice "early" to look diligent — say, four months before the one-year date — then files past the one-year mark assuming the 90-day extension applies. It does not. The extension only attaches when the notice falls inside the final 90 days. Later decisions, including Russell v. Stanford University Hospital (1997) 15 Cal.4th 783, confirmed that the statutory extension is the mechanism the Legislature provided; courts have been reluctant to graft a separate equitable tolling period onto the notice requirement to rescue a late filing. Calendar the notice against the limitations date, not against your own sense of good practice.
The limitations analysis gets harder when federal regulatory evidence or an administrative finding is part of the injury discovery story, a problem that has grown since courts stopped deferring to agency interpretations. We covered that shift in Loper Bright and the changing weight of regulatory evidence in PI cases, and the discovery-rule questions it raises reach straight into section 340.5 accrual.
Expert Declarations Are the Actual Gatekeeper
California has no certificate-of-merit statute. You do not attach an affidavit from a reviewing physician to your complaint the way counsel in Texas or Georgia must. That absence misleads people into thinking the expert requirement is soft. It is not soft — it just arrives at summary judgment instead of at filing.
In nearly every med-mal case, the standard of care and causation are matters beyond common experience, so they must be established by expert testimony. A defendant moving for summary judgment carries the initial burden with a declaration from a qualified physician stating that the care met the standard and did not cause the injury. If that declaration is competent, the burden shifts, and the plaintiff must produce an expert declaration raising a triable issue. A plaintiff with no expert, or with an expert whose declaration is defective on its face, loses — regardless of how strong the underlying facts feel.
Causation carries its own evidentiary standard: the plaintiff's expert must opine that the breach caused the injury to a reasonable medical probability, not merely that it could have. A declaration that speaks in terms of possibility, increased risk, or "cannot be ruled out" does not carry the burden. That gap between possibility and probability is where defense counsel focus their reply.
Where Compliance Defects Kill the Declaration
The appellate law on expert declarations is not symmetrical, and the asymmetry favors plaintiffs who understand it. Two lines of cases set the boundaries.
On the defense side — and against conclusory plaintiff declarations — Kelley v. Trunk (1998) 66 Cal.App.4th 519 holds that an expert declaration offering only a bare conclusion, without reasoned explanation of why the facts lead to the opinion, does not satisfy the burden. A declaration that recites the standard of care and announces it was met, with no analytic bridge, is not competent evidence. The reasoning has to be shown.
Foundation is the second defect. Garibay v. Hemmat (2008) 161 Cal.App.4th 735 is the case to know: an expert declaration built on medical records that were never themselves placed before the court as admissible evidence lacks foundation. The expert cannot serve as the conduit that smuggles in unauthenticated records. If the records supporting the opinion are not in evidence, the opinion resting on them fails — and that defect is as fatal to a defendant's moving declaration as to a plaintiff's opposing one. When you oppose, scrutinize whether the defense expert actually authenticated the records the opinion depends on.
The plaintiff's own declaration gets a more forgiving read. Under Powell v. Kleinman (2007) 151 Cal.App.4th 112, a declaration submitted in opposition to summary judgment is liberally construed, with doubts resolved in favor of the party opposing the motion. That rule, read alongside Hanson v. Grode (1999) 76 Cal.App.4th 601, means a plaintiff's expert declaration that is less polished than the defense submission can still defeat the motion if it supplies reasoned opinion on standard of care and causation. Liberal construction is not a cure for a missing foundation or a missing causation opinion, but it does give the opposing expert room the moving expert does not get.
Arbitration Clauses and Section 1295
Before the limitations and expert questions ever arrive, many med-mal claims face a threshold fight over forum. Section 1295 governs arbitration agreements in contracts for medical services and prescribes the specific bold-face notice language and the 30-day rescission right a provider must give for the agreement to bind. A clause that departs from the statutory format, or that was signed by someone without authority to contract for the patient, is open to attack.
The enforceability questions mirror what courts are working through in the transportation and gig context — who agreed, to what, and whether a signature by a family member reaches the injured party. The reasoning in the Illinois Supreme Court's rejection of Uber arbitration in a wrongful death suit tracks the same consent and scope problems that defeat defective section 1295 clauses: an agreement does not bind a party who never assented to it. Test the formation of the arbitration agreement before conceding the forum.
The Closing Observation
The MICRA cap is a number you argue about after you have a verdict. Everything that determines whether you get there — the notice timing under section 364, the extension math from Woods v. Young, the foundation and reasoning requirements that govern every expert declaration, and the formation defects in a section 1295 clause — is procedural, and none of it forgives inattention. These same compliance and lien questions follow the case all the way to the end, as the competing-claims problem in hospital lien statutes and letters of protection shows at settlement. Work the procedure first. The cap can wait.