S15E18Grey's Anatomy season 15 episode 18: Add It Up
Aired 21 March 201943 minRated TV-14
Where to watch Grey's Anatomy Season 15 in Australia
Grey's Anatomy season 15 is streaming in Australia on Disney+ (subscription, listed for the whole show).
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Availability checked 16 November 2026.
What happens in “Add It Up”
Maggie introduces mood rooms as an alternative approach to medicine. Alex and DeLuca butt heads over an 11-year-old patient who tries to sabotage her own surgery. Jackson and Richard deal with a gender non-binary patient. Meanwhile, Teddy has a pregnancy scare that brings Owen and Koracick to odds.
Episode summary: TMDB.
Before you watch
- It is episode 18 of 25 of season 15, so watch episodes 1 to 17 first.
- It runs about 43 minutes.
- Directed by Michael W. Watkins, written by Alex Manugian.
- TMDB users rate it 7.8 out of 10 (9 votes).
Grey's Anatomy trailer
The official trailer for the series (no preview of this episode has been published).
Play video: Grey's Anatomy trailer
Cast and crew of this episode
- Director
- Michael W. Watkins
- Writer
- Alex Manugian
- Guest stars
- Chris Carmack as Atticus LincolnJake Borelli as Levi SchmittGreg Germann as Tom KoracickStefania Spampinato as Carina DeLucaJaicy Elliot as Taryn HelmAri Hader as Tobby DonnellyAlex Blue Davis as Casey ParkerLidya Jewett as Nora Hillridge
Credits: TMDB.
More from Grey's Anatomy Season 15
Every episode of Season 15Grey's Anatomy episode guide
Episode names, air dates, runtimes, stills and ratings: TMDB. Air dates are the first broadcast anywhere; where it streams is our daily Australian check.