On November 20, 2023, Emanate Health filed an antitrust suit against Optum Health with the US District Court for the Central District of California. Specific causes of action include attempted monopolization, unfair business practices, unlawful business practices, and intentional interference with prospective economic advantage.

Optum is a subsidiary of UnitedHealth, and is the largest employer of physicians in the United States, with nearly 90,000 employed or affiliated physicians after adding nearly 20,000 physicians in 2023. Emanate Health is a nonprofit group of hospitals and physicians providing care in the San Gabriel Valley in California. Emanate has asked for a jury trial in the case.