Immigration · Primary-source case analysis

Hui v. Castaneda: FTCA Remedy Was Exclusive for Covered PHS Medical Conduct

By Aneeta Mishra and Timothy Chan

Published September 24, 2026

Decision: Hui v. Castaneda, 559 U.S. 799 (2010).

Hui v. Castaneda, 559 U.S. 799 (2010), held that 42 U.S.C. § 233(a) makes the Federal Tort Claims Act remedy against the United States exclusive for personal injury arising from medical or related functions performed by Public Health Service officers or employees within the scope of employment. The statute therefore barred the estate’s Bivens damages claims against the individual PHS defendants.

Francisco Castaneda was held by immigration authorities at the San Diego Correctional Facility. According to the complaint—which the courts had to accept as true at the motion-to-dismiss stage—he repeatedly sought care for a painful, bleeding lesion. A Public Health Service physician’s assistant and outside specialists recommended a biopsy, but the procedure was delayed and characterized as elective. After ICE released him, a biopsy confirmed metastatic cancer. Castaneda underwent surgery and chemotherapy and died the next year.

Severe allegations arising from immigration-detention care

Before his death, Castaneda sued the United States for medical negligence under the FTCA and sued individual PHS personnel under Bivens v. Six Unknown Federal Narcotics Agents, alleging deliberate indifference to serious medical needs. His estate representative and heir continued the case after he died. The gravity of those alleged facts forms the setting, but it did not define the legal question the Supreme Court agreed to decide.

The individual defendants moved to dismiss the constitutional damages claims based on 42 U.S.C. § 233(a). That provision channels claims for personal injury or death resulting from medical or related functions performed by a PHS officer or employee acting within the scope of employment into an FTCA action against the United States.

The procedural question was immunity, not the merits of care

The district court denied dismissal, and the Ninth Circuit affirmed. The court of appeals relied in part on Carlson v. Green, which had allowed an Eighth Amendment damages claim despite the availability of an FTCA remedy, and reasoned that Congress enacted Section 233 before Bivens. A conflict existed with the Second Circuit, which had read Section 233(a) to foreclose Bivens claims against PHS personnel.

The Supreme Court separated two questions that can be easy to collapse: whether a constitutional damages cause of action exists and whether a particular defendant is immune from it. Hui addressed the second question. The Court expressly did not decide whether a Bivens remedy would otherwise have been available on these allegations.

Why Section 233(a)’s text controlled

Justice Sotomayor, writing for a unanimous Court, began and ended with the statute. Section 233(a) says the FTCA remedy for covered injury “shall be exclusive of any other civil action or proceeding” against the officer or employee concerning the same subject matter. The breadth of “exclusive,” “any,” and “same subject-matter” foreclosed the individual-capacity action when the alleged conduct fell within the covered medical functions and scope of employment.

The opinion stated the rule directly: “Section 233(a) grants absolute immunity to PHS officers and employees for actions arising out of the performance of medical or related functions within the scope of their employment by barring all actions against them for such conduct.” Hui, 559 U.S. at 806.

The fact that Congress enacted the provision before Bivens did not change the ordinary meaning of language broad enough to cover both known and later-recognized causes of action. The later Westfall Act supported that reading: Congress used similar exclusivity language there but expressly preserved constitutional claims. It enacted no comparable exception to Section 233(a).

The Court rejected the Carlson and Westfall Act theories

Carlson did not control because its defendants had invoked no official immunity. It asked whether an implied constitutional remedy could coexist with the FTCA, not whether Congress had made specified personnel immune from individual suit. The Court also rejected an effort to import the Westfall Act’s Bivens exception through Section 233(a)’s cross-reference to 28 U.S.C. § 1346(b). The cross-reference incorporates the FTCA remedy, not every immunity exception elsewhere in the Act.

Nor did the Westfall Act directly preserve these claims. Its constitutional-claim exception applies to the immunity created in its own preceding paragraph. Reading it to repeal the older, more specific PHS immunity by implication lacked the clear congressional intent required for such a repeal. Other procedural provisions in Section 233 did not create a hidden Bivens exception.

Disposition and important limits

The Court reversed the Ninth Circuit’s judgment, 546 F.3d 682, and remanded. It decided that the individual PHS defendants could invoke Section 233(a) for covered conduct; it did not decide liability under the FTCA, whether the allegations were true, whether every person providing care in immigration detention was a PHS employee, or whether every detention medical-care claim belongs in the same remedial channel.

The scope-of-employment and covered-function predicates are consequential. So are the identity of each actor, the named defendant, administrative-exhaustion requirements, and timing rules. Later Supreme Court decisions have also restricted when courts recognize new Bivens contexts. Current counsel should analyze those developments separately rather than treating Hui as a general ruling that serious medical neglect has no remedy.

What this means in practice

• Identify who provided or denied care, the person’s agency and employment status, the medical function performed, and whether the conduct was within the scope of employment.
• Preserve medical requests, grievances, diagnoses, medication lists, outside-specialist recommendations, transfer records, release dates, and responses from custody staff.
• Separate the underlying standard of care from the threshold question of who may be sued and under what statutory remedy.
• Calendar FTCA administrative-presentment and limitations issues promptly; Hui does not excuse failure to satisfy them.

Related reading: Deportation defense practice; Removal defense FAQ; Adelanto detention medical-care analysis.