Match the fibroid's location to code descriptors. If your ob-gyn regularly performs uterine fibroid removals, then you need to acquaint yourself with the changes that will be happening when Oct. 1, 2013 hits. Background: Submucous fibroids (218.0) grow from the uterine wall toward the uterine cavity. They are also called intracavitary fibroids. Intramural fibroids (218.1) also called interstitial fibroids grow within the uterine wall (myometrium). subserous fibroids (218.2) or subperitoneal fibroids grow outward from the uterine wall toward the abdominal cavity. If the physician does not specify the location of the uterine fibroid, assign 218.9 (Leiomyoma of uterus, unspecified) as the diagnosis. Important: Look ahead: D25.0 -- Submucous leiomyoma of uterus D25.1 -- Intramural leiomyoma of uterus or Interstitial leiomyoma of uterus D25.2 -- Subserosal leiomyoma of uterus or Subperitoneal leiomyoma of uterus D25.9 -- Leiomyoma of uterus, unspecified Head to http://www.cdc.gov/nchs/icd/icd10cm.htm#10updateto learn more about ICD-10.