Estate of Frey v. Mastroianni., 463 P.3d 1197

Background

Robert Frey was hospitalized June 2004, discharged by Dr. Robert Mastroianni on June 13 with a diagnosis of "bronchitis" despite fever, vomiting while unconscious, and x-ray findings suggesting developing pneumonia; Frey was readmitted and died June 15 of necrotizing pneumonia and sepsis.
Claimants submitted a written Claim Letter to the Medical Claim Conciliation Panel (MCCP) alleging medical negligence (failure to diagnose/treat pneumonia, failure to repeat x-ray, premature discharge, failure to give IV antibiotics) and stating it was "likely" Frey would have survived with different care.
MCCP ruled for the Claimants; Claimants sued in circuit court in 2007. By trial (2014) the Estate was sole plaintiff and presented three expert witnesses who opined the discharge breached the standard of care and that earlier/hospital treatment would have "significantly" improved Frey’s chance of survival; each witness stated opinions were to a reasonable degree of medical probability.
Defense moved for judgment as a matter of law after the Estate rested, arguing (1) the Estate failed to plead a distinct "loss of chance" claim before the MCCP (so court lacked jurisdiction) and (2) expert testimony failed to prove causation to a reasonable degree of medical probability. The circuit court granted JMOL for defendant; ICA affirmed, treating loss of chance as a separate compensable injury and finding causation insufficient.
Hawaiʻi Supreme Court granted certiorari and reversed: it held loss of chance is not an independent cause of action but may be considered under Hawaiʻi’s substantial-factor (Mitchell) causation framework; MCCP (now MICP) claim statements need only set forth facts, not detailed legal theories; the Estate presented sufficient expert evidence to survive JMOL; case remanded for new trial.

Issues

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether Hawaiʻi recognizes "loss of chance" as an independent cause of action in wrongful-death medical malpractice	Estate: loss of chance should be recognized at least as a theory of recoverable harm or causation	Mastroianni: loss of chance is not recognized and, if recognized, was not pled	Court: Loss of chance is not a separate cause of action; it is a relevant theory for assessing legal causation under the substantial-factor (Mitchell) test
Whether failure to assert a loss-of-chance theory before the MCCP deprives the circuit court of jurisdiction to litigate that theory	Estate: MCCP pleading need only state facts; specific legal theories (loss of chance) need not be pled	Mastroianni: failure to raise loss of chance at MCCP is jurisdictional bar to later litigating that theory	Court: MCCP statute requires only a written statement of facts and parties; because loss of chance is not a distinct claim, failure to use the label does not strip jurisdiction
Scope of MCCP/MICP pleading requirements	Estate: statute requires simple factual statement, not a full legal theory	Mastroianni: MCCP requires specific legal claims to be pled	Court: MCCP/MICP filings are intentionally informal; plaintiffs need only set forth facts upon which claim is based, not detailed legal theories
Whether the Estate presented sufficient expert evidence of causation to survive a Rule 50 JMOL	Estate: experts testified negligence breached standard of care and that earlier/hospital treatment would have "significantly" improved survival chances; opinions were to reasonable medical probability	Mastroianni: expert testimony did not establish causation to a reasonable degree of medical probability (only showed possibility)	Court: Expert testimony was sufficient for a jury to find causation under the reasonable medical probability / substantial-factor standard; JMOL was erroneous; remand for new trial

Key Cases Cited

Mitchell v. Branch, 45 Haw. 128, 363 P.2d 969 (Haw. 1961) (adopting the substantial-factor test for legal causation in Hawaiʻi negligence law)
McKenna v. Volkswagenwerk Aktiengesellschraft, 57 Haw. 460, 558 P.2d 1018 (Haw. 1977) (reaffirming Mitchell substantial-factor approach)
Knodle v. Waikiki Gateway Hotel, Inc., 69 Haw. 376, 742 P.2d 377 (Haw. 1987) (explaining substantial-factor test and rejecting strict but-for causation)
O'Grady v. State, [citation="140 Hawai'i 36, 398 P.3d 625"] (Haw. 2017) (describing the Mitchell two-step legal-causation analysis)
Craft v. Peebles, [citation="78 Hawai'i 287, 893 P.2d 138"] (Haw. 1995) (requiring expert medical causation testimony to be based on reasonable medical probability)
Barbee v. Queen's Med. Ctr., [citation="119 Hawai'i 136, 194 P.3d 1098"] (Haw. App. 2008) (holding inadequate expert testimony failed to establish causal nexus)
McBride v. United States, 462 F.2d 72 (9th Cir. 1972) (applying Hawaiʻi law; permitting loss-of-chance reasoning where negligent failure deprived patient of significant improvement in recovery chances)
Hicks v. United States, 368 F.2d 626 (4th Cir. 1966) (early formulation endorsing recovery where defendant destroyed a substantial possibility of survival)
Delaney v. Cade, 873 P.2d 175 (Kan. 1994) (advocating the middle-ground/substantial-chance approach to loss-of-chance within substantial-factor causation)
Jones v. Montefiore Hosp., 431 A.2d 920 (Pa. 1981) (in medical malpractice, jury may find liability where negligence increased risk and that increased risk was a substantial factor)
Ehlinger v. Sipes, 454 N.W.2d 754 (Wis. 1990) (adopting substantial-chance approach consistent with substantial-factor causation)