Patient Number 9 is the thirteenth and final studio album by the English heavy metal singer Ozzy Osbourne. It was released on 9 September 2022 through Epic Records and was produced by Andrew Watt.

Patient Number 9 was Osbourne's last studio album to be released before his death in July 2025, although he had stated that he hit the studio in 2024 to work on 'one more album'.

Ozzy Osbourne – lead vocals, harmonica (tracks 10, 13)
Zakk Wylde – guitars (tracks 1–3, 6–9, 11, 12), keyboards (tracks 1, 5, 7, 9), organ (track 8)

Additional musicians
Andrew Watt – guitars (tracks 1–3, 5–13), bass (tracks 4, 6, 7, 9, 12), keyboards (tracks 1, 5–7, 11, 12), piano (tracks 3, 6, 12), drums (tracks 11, 12), backing vocals, production
Jeff Beck – guitars (tracks 1, 6)
Tony Iommi – guitars (tracks 4, 10)
Mike McCready – guitars, backing vocals (track 2)
Eric Clapton – guitars, backing vocals (track 5)
Josh Homme – guitars, backing vocals (track 12)
Robert Trujillo – bass (tracks 1, 3, 7, 9–12)
Duff McKagan – bass, backing vocals (tracks 2, 5)
Chris Chaney – bass (track 8)
Chad Smith – drums (tracks 1, 2, 4–6, 8–12), percussion (track 6)
Taylor Hawkins – drums (tracks 3, 7, 12), percussion (track 3)
James Poyser – organ (track 5)
David Campbell – strings arrangement (tracks 6, 11)
Charlie Bisharat – violin (tracks 6, 11)
Roberto Cani – violin (track 6)
Mario DeLeon – violin (track 6)
Nina Evtuhov – violin (track 6)
Songa Lee – violin (tracks 6, 11)
Natalie Leggett – violin (tracks 6, 11)
Philipp Levy – violin (track 6)
Alyssa Park – violin (track 6)
Michele Richards – violin (track 6)
Neil Samples – violin (tracks 6, 11)
Jennifer Takamatsu – violin (track 6)
Kerenza Peackock – violin (track 11)
Sara Parkins – violin (track 11)
Andrew Duckles – viola (tracks 6, 11)
Zachary Dellinger – viola (track 6)
David Walther – viola (tracks 6, 11)
Jacob Braun – cello (tracks 6, 11)
Paula Hochhalter – cello (tracks 6, 11)
Ross Gasworth – cello (track 6)