2026 ICD-10-CM Diagnosis Code R04.81Acute idiopathic pulmonary hemorrhage in infants
ICD-10-CM Codes›R00–R99›R00-R09›R04
- Billable — Valid for Submission
- Not Chronic
R04.81 is a billable ICD-10-CM diagnosis code for acute idiopathic pulmonary hemorrhage in infants. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is restricted by the Medicare Code Editor to pediatric patients (age 0 through 17). As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Respiratory signs and symptoms.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for R04.81.
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- AIPHI
- Acute idiopathic hemorrhage in infants over 28 days old
Type 1 Excludes
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.
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.
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- AIPHI(acute idiopathic pulmonary hemorrhage in infants (over 28 days old))
- Hemorrhage, hemorrhagic(concealed)
- acute idiopathic pulmonary, in infants
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Convert R04.81 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About R04.81Overview
Is R04.81 (Hemorrhage from other sites in respiratory passages) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report acute idiopathic pulmonary hemorrhage in infants on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can R04.81 be a principal diagnosis?
Use it with care. This is a symptom code, so once a definitive diagnosis explaining the acute idiopathic pulmonary hemorrhage in infants is established, that condition takes the principal position instead.
Who can R04.81 be reported for?
The Medicare Code Editor checks acute idiopathic pulmonary hemorrhage in infants against patient demographics: this code is intended for pediatric patients (age 0 through 17). Claims outside these limits are flagged as inconsistent.
What is the ICD-9 equivalent of R04.81?
Under the General Equivalence Mappings, acute idiopathic pulmonary hemorrhage in infants converts to ICD-9-CM 786.31 (ac idio pul hemrg infant). The mapping is a direct match.
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.
