T70.29 – Other effects of high altitude
ICD-10-CM 2027 diagnosis code · Other and unspecified effects of external causes
- Code
T70.29(claims format:T7029)- Description
- Other effects of high altitude
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
- Block
- T66-T78 Other and unspecified effects of external causes
- Parent codes
- T70 › T70.2
Billable codes under T70.29
T70.29 is a header code and cannot be used on claims. Choose the most specific code:
7th character values
Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).
| Character | Meaning |
|---|---|
A | initial encounter |
D | subsequent encounter |
S | sequela |
Notes for T70.29
- Alpine sickness
- Anoxia due to high altitude
- Barotrauma NOS
- Hypobaropathy
- Mountain sickness
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
T70 – Effects of air pressure and water pressure
- The appropriate 7th character is to be added to each code from category T70
T70.2 – Other and unspecified effects of high altitude
- polycythemia due to high altitude (D75.1)
Block T66-T78
- , if applicable, place of occurrence, such as:
- highway rest stop (Y92.523)
- school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
- service areas as the place of occurrence of the external cause (Y92.52-)
- single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
- transport vehicle as the place of occurrence of the external cause (Y92.81-)
Index terms for T70.29
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Barotrauma
- Hypobarism
- Aerodontalgia
- Andes disease
- Barodontalgia
- Hypobaropathy
- Alpine sickness
- Sickness, Andes
- Monge's disease
- Anoxia, altitude
- Sickness, alpine
- Acosta's disease
- Sickness, balloon
- Sickness, mountain
- Mountain, sickness
- Sickness, aviator's
- Barotrauma, odontalgia
- Disease, diseased, Andes
- Disease, diseased, alpine
- Disease, diseased, Monge's
- Disease, diseased, Acosta's
- Anoxia, due to, high altitude
- High, altitude effects, anoxia
- Effect, adverse, high altitude NEC
- Syndrome, low, atmospheric pressure
Related codes in T70.2
Frequently asked questions
What is ICD-10 code T70.29?
T70.29 is the ICD-10-CM code for other effects of high altitude, in the block T66-T78 (Other and unspecified effects of external causes).
Is T70.29 a billable code?
No. T70.29 is a header code with more specific child codes; report one of the billable codes listed above.
What category does T70.29 belong to?
It belongs to category T70 – Effects of air pressure and water pressure.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.