2026 ICD-10-CM Diagnosis Code T69.8XXAOther specified effects of reduced temperature, initial encounter
T69.8XXA is a billable ICD-10-CM diagnosis code for other specified effects of reduced temperature, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 922 through 923. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of other external causes, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Anaphylaxis caused by low temperature
- Cold burn - liquid nitrogen
- Cold injury of peripheral nerve
- Cold-induced dermatosis
- Cryalgesia
- Crymodynia
- Frost nip
- Headache due to cold exposure
- Hypothermic coma
- Injury due to chemical exposure
- Local cold injury
- Myotonia
- Myotonia due to cold exposure
- Occupational cold-induced dermatosis
- Psychroalgia
- Thermal injury of peripheral nerve
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Other effects of reduced temperature (T69). Use the following options for the applicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Myotonia
prolonged failure of muscle relaxation after contraction. this may occur after voluntary contractions, muscle percussion, or electrical stimulation of the muscle. myotonia is a characteristic feature of myotonic disorders.Myotonia Congenita
inherited myotonic disorders with early childhood onset myotonia. muscular hypertrophy is common and myotonia may impair ambulation and other movements. it is classified as thomsen (autosomal dominant) or becker (autosomal recessive) generalized myotonia mainly based on the inheritance pattern. becker type is also clinically more severe. an autosomal dominant variant with milder symptoms and later onset is known as myotonia levior. mutations in the voltage-dependent skeletal muscle chloride channel are associated with the disorders.Myotonic Disorders
diseases characterized by myotonia, which may be inherited or acquired. myotonia may be restricted to certain muscles (e.g., intrinsic hand muscles) or occur as a generalized condition.Myotonic Dystrophy
neuromuscular disorder characterized by progressive muscular atrophy; myotonia, and various multisystem atrophies. mild intellectual disability may also occur. abnormal trinucleotide repeat expansion in the 3' untranslated regions of dmpk protein gene is associated with myotonic dystrophy 1. dna repeat expansion of zinc finger protein-9 gene intron is associated with myotonic dystrophy 2.Osteochondrodysplasias
abnormal development of cartilage and bone.
Patient EducationClinical
Hypothermia
Cold weather can affect your body in different ways. You can get frostbite, which is an injury to the body that is caused by freezing. Your body can also lose heat faster than you can produce it. That can cause hypothermia, or abnormally low body temperature. It can make you sleepy, confused, and clumsy.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T69.8XXA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T69.8XXAOverview
Is T69.8XXA (Other specified effects of reduced temperature) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified effects of reduced temperature, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T69.8XXA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for other specified effects of reduced temperature, such as an emergency visit or first evaluation.
What MS-DRG does T69.8XXA group to?
When other specified effects of reduced temperature, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 922, 923, with relative weights from 1.0177 to 1.7494 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of T69.8XXA?
Under the General Equivalence Mappings, other specified effects of reduced temperature, initial encounter converts to ICD-9-CM 991.8 (effect reduced temp NEC). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
