T70.29XD is the authoritative medical code for Other effects of high altitude, subsequent encounter. This classification is used in medical billing and clinical recording to specify the clinical criteria for other effects of high altitude, subsequent encounter (ICD-10-CM T70.29XD), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Other effects of high altitude, subsequent encounter is a billable ICD-10-CM diagnosis code T70.29D. Inclusion terms: Alpine sickness; Anoxia due to high altitude; Barotrauma NOS; Hypobaropathy; Mountain sickness. Excludes2 (not included here): polycythemia due to high altitude D75.1. Code also: , 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-. 7th character: The appropriate 7th character is to be added to each code from category T70.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T70.29XD in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Alpine sickness
- Anoxia due to high altitude
- Barotrauma NOS
- Hypobaropathy
- Mountain sickness
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- polycythemia due to high altitude D75.1
Code Also
Additional codes that may be required to fully describe the encounter.
- , 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-
Frequently Asked Questions (FAQ) & Clinical Guidance
Does T70.29XD require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T70.
Can T70.29XD be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, T70.29XD and the following are not considered part of each other and may both be reported when both conditions are present: polycythemia due to high altitude (D75.1).
What conditions are included under T70.29XD?
Other effects of high altitude, subsequent encounter includes: Alpine sickness; Anoxia due to high altitude; Barotrauma NOS; Hypobaropathy; Mountain sickness.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T70.29XD in its code family, with their registry titles.
- T70 — Effects of air pressure and water pressure
- T70.0 — Otitic barotrauma
- T70.0XXA — Otitic barotrauma, initial encounter
- T70.0XXD — Otitic barotrauma, subsequent encounter
- T70.0XXS — Otitic barotrauma, sequela
- T70.1 — Sinus barotrauma
- T70.1XXA — Sinus barotrauma, initial encounter
- T70.1XXD — Sinus barotrauma, subsequent encounter
- T70.1XXS — Sinus barotrauma, sequela
- T70.2 — Other and unspecified effects of high altitude
View all 33 codes in the T70 family