The legal review must prove more than a death after treatment.

The review should begin before the alleged departure and continue through death. Symptoms, prior conditions, risk factors, office calls, triage, referrals, testing, imaging, pathology, diagnosis, medication, procedure, anesthesia, monitoring, deterioration, escalation, transfer, resuscitation, discharge, return visits, palliative decisions, death certificate, autopsy or medical-examiner material, and later expert opinions may all matter. Native records and timestamps can differ from a narrative summary.

The proposed alternative must also be defined. Earlier diagnosis, admission, treatment, transfer, monitoring, or response matters only with evidence that it was reasonable then and probably would have changed the course. The underlying disease, comorbidities, recognized risks, patient decisions, intervening events, and alternative causes should be addressed rather than hidden.

Medical evidence can include the designated record, native images and waveforms, medication and device logs, secure messages, call recordings, staffing and schedules, applicable policies, referral and result-routing data, emergency services, outside practices, pathology, death certificate, autopsy, toxicology, and prior health records. The facility, physician group, public trust, tribal organization, federal agency, contractor, and vendor may each hold separate data or assert different protections.

Estate and family evidence includes probate papers, family facts, expenses, liens, insurance, earnings, benefits, services, dependency, relationships, and survivor-specific losses. A representative's authority to obtain records, retain counsel, file, settle, and distribute should be verified instead of inferred from kinship.

A standard-of-care expert should match the defendant's role, specialty, setting, and information available at the time. A causation expert may need a different discipline to address what the underlying condition would have done, what a supported alternative treatment would have achieved, and which portion of the fatal course is attributed to the alleged departure. Pathology, oncology, infectious disease, cardiology, surgery, neurology, toxicology, or another field may be needed depending on the case.

Oklahoma decisions addressing ordinary proximate cause and medical loss of chance require close reading. The latter is not a shortcut from delay to full wrongful-death damages. Counsel and experts must address whether the doctrine applies, the original and changed chance, the substantial reduction issue, supporting evidence, alternative causes, admissibility, and the measure of damages allowed for the proven change.

Counsel should verify the personal representative, beneficial interests, minor or incapacitated survivors, survival claim, expenses, liens, and settlement authority while identifying each physician, group, hospital, public trust, contractor, pharmacy, laboratory, tribal provider, federal employee, or other actor. Employment, agency, credentialing, control, immunity, federal deeming, sovereign status, and proper defendant cannot be assumed from branding.

The calendar should separately evaluate the medical claim, wrongful death, survival, probate appointment, discovery, repose, minority or incapacity, affidavit and expert issues, public or federal notice or presentment, tribal law and forum, record retention, insurance, liens, venue, and jurisdiction. The facility complaint, licensing review, death investigation, records request, and probate case do not necessarily satisfy a civil requirement.