2024 ICD-10-CM Diagnosis Code R40.2440

Other coma, without documented Glasgow coma scale score, or with partial score reported, unspecified time

ICD-10-CM Code:: R40.2440
ICD-10 Code for:: Other coma, without Glasgow, or w/part score, unsp time
Is Billable?: Yes - Valid for Submission
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Table of Contents

Code Information
Approximate Synonyms
Clinical Classification
Tabular List of Diseases and Injuries
Code Edits
Replacement Code
Convert to ICD-9 Code
Patient Education
Other Codes Used Similar Conditions
Code History

Code Classification

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
(R00–R99)
- Symptoms and signs involving cognition, perception, emotional state and behavior
  (R40-R46)
  - Somnolence, stupor and coma
    (R40)

R40.2440 is a billable diagnosis code used to specify a medical diagnosis of other coma, without documented glasgow coma scale score, or with partial score reported, unspecified time. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

This code describes a circumstance which influences the patient's health status but not a current illness or injury. The code is unacceptable as a principal diagnosis.

Unspecified diagnosis codes like R40.2440 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Blistering of skin due to drug-induced coma
Bullae and sweat gland necrosis in drug-induced coma

Clinical Classification

Clinical Category is Nervous system signs and symptoms
CCSR Category Code: SYM010
Inpatient Default CCSR: X - Not applicable.
Outpatient Default CCSR: X - Not applicable.

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10-CM Code Edits are applicable to this code:

Unacceptable principal diagnosis - There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Replacement Code

R402440 replaces the following previously assigned ICD-10-CM code(s):

R40.244 - Oth coma,w/o Glasgow coma scale score,or w/part score report

Convert R40.2440 to ICD-9-CM

ICD-9-CM Code: -
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Other ICD-10-CM Codes Commonly Used for Similar Conditions

Filter related codes list:

R40 Somnolence, stupor and coma.
R40.0 Somnolence.
R40.1 Stupor.
R40.2 Coma.
R40.20 Unspecified coma.
R40.21 Coma scale, eyes open.
R40.211 Coma scale, eyes open, never.
R40.2110 Coma scale, eyes open, never, unspecified time.
R40.2111 Coma scale, eyes open, never, in the field [EMT or ambulance].
R40.2112 Coma scale, eyes open, never, at arrival to emergency department.
R40.2113 Coma scale, eyes open, never, at hospital admission.
R40.2114 Coma scale, eyes open, never, 24 hours or more after hospital admission.
R40.212 Coma scale, eyes open, to pain.
R40.2120 Coma scale, eyes open, to pain, unspecified time.
R40.2121 Coma scale, eyes open, to pain, in the field [EMT or ambulance].
R40.2122 Coma scale, eyes open, to pain, at arrival to emergency department.
R40.2123 Coma scale, eyes open, to pain, at hospital admission.
R40.2124 Coma scale, eyes open, to pain, 24 hours or more after hospital admission.
R40.213 Coma scale, eyes open, to sound.
R40.2130 Coma scale, eyes open, to sound, unspecified time.
R40.2131 Coma scale, eyes open, to sound, in the field [EMT or ambulance].
R40.2132 Coma scale, eyes open, to sound, at arrival to emergency department.
R40.2133 Coma scale, eyes open, to sound, at hospital admission.
R40.2134 Coma scale, eyes open, to sound, 24 hours or more after hospital admission.
R40.214 Coma scale, eyes open, spontaneous.
R40.2140 Coma scale, eyes open, spontaneous, unspecified time.
R40.2141 Coma scale, eyes open, spontaneous, in the field [EMT or ambulance].
R40.2142 Coma scale, eyes open, spontaneous, at arrival to emergency department.
R40.2143 Coma scale, eyes open, spontaneous, at hospital admission.
R40.2144 Coma scale, eyes open, spontaneous, 24 hours or more after hospital admission.
R40.22 Coma scale, best verbal response.
R40.221 Coma scale, best verbal response, none.
R40.2210 Coma scale, best verbal response, none, unspecified time.
R40.2211 Coma scale, best verbal response, none, in the field [EMT or ambulance].
R40.2212 Coma scale, best verbal response, none, at arrival to emergency department.
R40.2213 Coma scale, best verbal response, none, at hospital admission.
R40.2214 Coma scale, best verbal response, none, 24 hours or more after hospital admission.
R40.222 Coma scale, best verbal response, incomprehensible words.
R40.2220 Coma scale, best verbal response, incomprehensible words, unspecified time.
R40.2221 Coma scale, best verbal response, incomprehensible words, in the field [EMT or ambulance].
R40.2222 Coma scale, best verbal response, incomprehensible words, at arrival to emergency department.
R40.2223 Coma scale, best verbal response, incomprehensible words, at hospital admission.
R40.2224 Coma scale, best verbal response, incomprehensible words, 24 hours or more after hospital admission.
R40.223 Coma scale, best verbal response, inappropriate words.
R40.2230 Coma scale, best verbal response, inappropriate words, unspecified time.
R40.2231 Coma scale, best verbal response, inappropriate words, in the field [EMT or ambulance].
R40.2232 Coma scale, best verbal response, inappropriate words, at arrival to emergency department.
R40.2233 Coma scale, best verbal response, inappropriate words, at hospital admission.
R40.2234 Coma scale, best verbal response, inappropriate words, 24 hours or more after hospital admission.
R40.224 Coma scale, best verbal response, confused conversation.
R40.2240 Coma scale, best verbal response, confused conversation, unspecified time.

Code History

FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018