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ICD-10-CM 2027 diagnosis code

T70.3Caisson disease [decompression sickness]

Not billable — use a more specific codeRequires 7th character

T70.3 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

Looking up by condition? See ICD-10 code for Bends, ICD-10 code for Chokes, ICD-10 code for Squeeze, ICD-10 code for Dysbarism.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T70.3

T70.3 is the ICD-10-CM diagnosis code for Caisson disease [decompression sickness]. It belongs to category T70 (effects of air pressure and water pressure), block T66-T78 (other and unspecified effects of external causes) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within T70 (effects of air pressure and water pressure), T70.3 is specifically for Caisson disease [decompression sickness]. Related codes cover otitic barotrauma (T70.0), sinus barotrauma (T70.1), other and unspecified effects of high altitude (T70.2), effects of high-pressure fluids (T70.4), other effects of air pressure and water pressure (T70.8) and effect of air pressure and water pressure, unspecified (T70.9).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category T70

Coding notes

Applicable toConditions and synonyms classified to this code
  • Compressed-air disease
  • Diver's palsy or paralysis

Notes that apply from higher levels

Instructions written at a parent level also apply to T70.3.

Broader instructions also apply from T66-T78 Other and unspecified effects of external causes and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Alphabetic index entries

40 entries

Terms in the official ICD-10-CM index that lead to T70.3.

Codes whose notes reference T70.3

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T70.3

Is T70.3 billable?

No. T70.3 is a header code. Report one of its more specific subcodes instead.