I am sorry to hear this.
My opinion is that a person in the situation you describes is eligible for "limited Medi-Cal Special Treatment Program" and/or "Emergency Medi-Cal" benefits for dialysis because the person is a legal resident, even though holders of nonimmigrant visas are not eligble for regular Medi-Cal, seehttp://www.dhcs.ca.gov/services/medi-cal/eligibility/Documents/Article17-Medi-CalTreatmentPrograms.pdf
which states at page 5:
"Persons who need dialysis, or total parental nutrition (TPN), and related services may be eligible for limited Medi-Cal Special Treatment Programs coverage if all of the following conditions are met in a month:
o In need of dialysis, or TPN, and related services;
o Not eligible for regular Medi-Cal because of excess property;
o Not currently eligible for Medicare if under age 65 (applies only to Dialysis);
o Meet standard Medi-Cal requirements for citizenship or legal immigration status
linkage, cooperation, and residency.
o For TPN 'Only": Medi-Cal linkage requirements are not necessary."
It is scandalous that whichever country sent the person here on a diplomatic visa is not itself paying for this type of necessary medical care.http://healthconsumer.org/Medi-CalOverview2008Ch14.pdf
"Those immigrants who are not eligible for full scope Medi-Cal still can receive emergency and pregnancy-related services under restricted or emergency Medi-Cal, as well as other types of services. This chapter explains the range of publicly funded health services available to these immigrants."
"Long-Term Care and Kidney Dialysis
Long-term care services are provided for “otherwise eligible” immigrants through a state-funded program. Initially, the state created a state-funded program of long-term care and renal dialysis for “not qualified” and undocumented immigrants as a result of a court decision. The Department of Health Care Services, formerly known as the Department of Health Services, acknowledged that “’in most cases renal dialysis does constitute ‘emergency’ treatment’ for which federal financial participation is available….” The court interpreted the statute as creating a “safety net” program to only fund long-term care and renal dialysis that did not qualify for federal reimbursement as an “emergency medical condition.” "Here
is a Court of Appeal opinion on the similar issue of emergency medical care for people wthout any type of visa at all. That opinion states: " plaintiffs were granted a preliminary injunction preventing DHS from (1) denying restricted-scope coverage under Medi-Cal to undocumented aliens needing long-term care or dialysis"
I hope this information is helpful.