MCMCB Pro
T70.3

T70.3Caisson disease [decompression sickness]

Non-billable headerICD-10-CM

T70.3 is a non-billable header ICD-10-CM code for caisson disease [decompression sickness]. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

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

A
initial encounter
D
subsequent encounter
S
sequela

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Compressed-air disease
  • Diver's palsy or paralysis

Risk adjustment

T70.3 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How T70.3 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to T70.3.

  • Aerobullosis
  • Aeroembolism
  • Bends
  • Caisson disease
  • Chokes(resulting from bends)
  • Compressed air disease
  • Decompression sickness
  • Diver's palsy, paralysis or squeeze
  • Dysbarism
  • Squeeze, diver's
  • Aircompressed, disease
  • Arthralgiain caisson disease

Code to one of these instead T70.3

3 child codes. Green means billable.

Related codes at this level

Codes that share T70. If T70.3 is not quite right, the correct code is usually one of these.

Questions about T70.3

Is T70.3 a billable ICD-10-CM code?
No. T70.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does T70.3 sit in the tabular list?
Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Other and unspecified effects of external causes (T66-T78).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.