News: ICD-10-CM code set for fiscal year 2027 released

CMS has published the fiscal year (FY) 2027 ICD-10-CM code set, including 190 new codes, 30 deleted codes, and four revised codes. These updates will become effective on October 1, 2026.

Of the 190 new codes, 33 are related to continuing pregnancy after vanishing twin syndrome (category O31.4) and 17 codes related to the toxic effect of cycloparaffins (category T52.82).

Other new codes cover a range of diagnoses, including:

• Neoplasms:
  
  • C78.31, Secondary malignant neoplasm of larynx
  • C78.32, Secondary malignant neoplasm of pharynx
  • C79.83, Secondary malignant neoplasm of oral cavity
• Diseases of the pelvis:
  
  • K6A, Diseases of the pelvis, not elsewhere classified
  • K6A.0, Pelvic abscess
  • K6A.01, Prevesical abscess
  • K6A.09, Other pelvic abscess
  • K6A.8, Other diseases of the pelvis, not elsewhere classified
• Odontogenic sinusitis
  
  • J34.83, Odontogenic sinusitis
  • J34.830, Odontogenic sinusitis, maxillary sinus
  • J34.831, Odontogenic sinusitis, ethmoid sinus
  • J34.832, Odontogenic sinusitis, frontal sinus
  • J34.833, Odontogenic sinusitis, sphenoid sinus
  • J34.839, Odontogenic sinusitis, unspecified
• Plantar fasciitis
  
  • M67.A , Plantar fasciitis
  • M67.A0, Plantar fasciitis, foot
  • M67.A01, Plantar fasciitis, right foot
  • M67.A02, Plantar fasciitis, left foot
  • M67.A09, Plantar fasciitis, unspecified foot
  • M72.20, Plantar fascial fibromatosis, unspecified foot
  • M72.21, Plantar fascial fibromatosis, right foot
  • M72.22, Plantar fascial fibromatosis, left foot
• Toxic effects of alkenes
  
  • T52.81, Toxic effects of alkenes
  • T52.811, Toxic effect of alkenes, accidental (unintentional)
  • T52.811A, Toxic effect of alkenes, accidental (unintentional), initial encounter
  • T52.811D, Toxic effect of alkenes, accidental (unintentional), subsequent encounter
  • T52.811S, Toxic effect of alkenes, accidental (unintentional), sequela
  • T52.812, Toxic effect of alkenes, intentional self-harm
  • T52.812A, Toxic effect of alkenes, intentional self-harm, initial encounter
  • T52.812D, Toxic effect of alkenes, intentional self-harm, subsequent encounter
  • T52.812S, Toxic effect of alkenes, intentional self-harm, sequela
  • T52.813, Toxic effect of alkenes, assault
  • T52.813A, Toxic effect of alkenes, assault, initial encounter
  • T52.813D, Toxic effect of alkenes, assault, subsequent encounter
  • T52.813S, Toxic effect of alkenes, assault, sequela
  • T52.814, Toxic effect of alkenes, undetermined
  • T52.814A, Toxic effect of alkenes, undetermined, initial encounter
  • T52.814D, Toxic effect of alkenes, undetermined, subsequent encounter
  • T52.814S, Toxic effect of alkenes, undetermined, sequela
• Body mass indexes
  
  • Z68.18, Body mass index [BMI] 18.4 or less, adult
  • Z68.19, Body mass index [BMI] 18.5-19.9, adult
• Gender identity and transitioning
  
  • F64.A , Gender identity disorder, in remission
  • Z87.8901, Personal history of social gender transition
  • Z87.8902, Personal history of medical gender transition
  • Z87.8903, Personal history of surgical gender transition
  • Z87.8904, Personal history of intersex surgery
  • Z87.8909, Personal history of unspecified gender
  • Z87.893, Personal history of gender detransition

Deleted codes include those for sternoclavicular sprains:

• S23.420, Sprain of sternoclavicular (joint) (ligament)
• S23.420A, Sprain of sternoclavicular (joint) (ligament), initial encounter
• S23.420D, Sprain of sternoclavicular (joint) (ligament), subsequent encounter
• S23.420S, Sprain of sternoclavicular (joint) (ligament), sequela

Editor’s note: To view all the changes included in the FY 2027 code set, visit the CMS website here. To read additional coverage by JustCoding, click here.