2026 ICD-10-CM Diagnosis Code J95.4Chemical pneumonitis due to anesthesia
ICD-10-CM Codes›J00–J99›J95›J95
- Billable — Valid for Submission
- Not Chronic
J95.4 is a billable ICD-10-CM diagnosis code for chemical pneumonitis due to anesthesia. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 205 through 206. Coders also document this condition as chemical pneumonitis caused by anesthesia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Aspiration pneumonitis and Postprocedural or postoperative respiratory system complication.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Chemical pneumonitis caused by anesthesia
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Mendelson's syndrome
- Postprocedural aspiration pneumonia
Use Additional Code
- code for adverse effect, if applicable, to identify drug T41
Type 1 Excludes
- aspiration pneumonitis due to anesthesia complicating labor and delivery O74.0
- aspiration pneumonitis due to anesthesia complicating pregnancy O29
- aspiration pneumonitis due to anesthesia complicating the puerperium O89.01
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Mendelson's syndrome (due to anesthesia) - J95.4
- Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) - J18.9
- aspiration - J69.0
- postprocedural - J95.4
- Pneumonitis (acute) (primary) - See Also: Pneumonia; - J98.4
- aspiration - J69.0
- due to
- anesthesia - J95.4
- chemical (due to gases, fumes or vapors) (inhalation) - J68.0
- due to anesthesia - J95.4
- postanesthetic - J95.4
- postoperative - J95.4
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Complication(s) (from) (of)
- respiratory system
- postoperative
- Mendelson's syndrome (chemical pneumonitis)
- Mendelson's syndrome(due to anesthesia)
- Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
- aspiration
- postprocedural
- Pneumonitis(acute) (primary)
- aspiration
- due to
- anesthesia
- Pneumonitis(acute) (primary)
- chemical (due to gases, fumes or vapors) (inhalation)
- due to anesthesia
- Pneumonitis(acute) (primary)
- postanesthetic
- Pneumonitis(acute) (primary)
- postoperative
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Anesthesia
Anesthesia is the use of medicines, called anesthetics, to prevent pain during surgery and other medical procedures. Medicine may be given by injection, inhalation, topical lotion, spray, eye drops, or a skin patch.
The full article covers:
- What is anesthesia?
- What is anesthesia used for?
- What are the types of anesthesia?
- What are the risks of anesthesia?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert J95.4 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About J95.4Overview
Is J95.4 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report chemical pneumonitis due to anesthesia on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does J95.4 group to?
When chemical pneumonitis due to anesthesia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 205, 206, with relative weights from 0.9411 to 1.8310 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of J95.4?
Under the General Equivalence Mappings, chemical pneumonitis due to anesthesia converts to ICD-9-CM 997.39 (respiratory comp 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.
