2026 ICD-10-CM Diagnosis Code T73.3XXAExhaustion due to excessive exertion, initial encounter
T73.3XXA is a billable ICD-10-CM diagnosis code for exhaustion due to excessive exertion, 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. Coders also document this condition as exhaustion - physiological. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of other external causes, initial encounter; External cause codes: intent of injury, accidental/unintentional; and External cause codes: overexertion; initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Exhaustion - physiological
- Exhaustion due to excessive exertion
- Overexertion
- Overexertion and strenuous movements
- Overexertion from lifting
- Overexertion from pulling
- Overexertion from pushing
- Overexertion, strenuous movements and vibration
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Effects of other deprivation (T73). 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.
Patient EducationClinical
Fatigue
Fatigue is a feeling of weariness, tiredness, or lack of energy. It can interfere with your usual daily activities. Fatigue can be a normal response to physical activity, emotional stress, boredom, or lack of sleep. But sometimes it can be a sign of a mental or physical condition.
The full article covers:
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Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T73.3XXA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T73.3XXAOverview
Is T73.3XXA (Exhaustion due to excessive exertion) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report exhaustion due to excessive exertion, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T73.3XXA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for exhaustion due to excessive exertion, such as an emergency visit or first evaluation.
What MS-DRG does T73.3XXA group to?
When exhaustion due to excessive exertion, 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 T73.3XXA?
Under the General Equivalence Mappings, exhaustion due to excessive exertion, initial encounter converts to ICD-9-CM 994.5 (exhaustion-excess exert) and E927.2 (excess physical exert). 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.
