Version 2024

No Valid Principal Dx

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2024 ICD-10-CM Diagnosis Code R94.2

Abnormal results of pulmonary function studies

ICD-10-CM Code:: R94.2
ICD-10 Code for:: Abnormal results of pulmonary function studies
Is Billable?: Yes - Valid for Submission
Chronic Condition Indicator: ^[1]: Not chronic
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Table of Contents

Code Information
Approximate Synonyms
Clinical Classification
Tabular List of Diseases and Injuries
Index to Diseases and Injuries References
Diagnostic Related Groups Mapping
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)
- Abnormal findings on diagnostic imaging and in function studies, without diagnosis
  (R90-R94)
  - Abnormal results of function studies
    (R94)

R94.2 is a billable diagnosis code used to specify a medical diagnosis of abnormal results of pulmonary function studies. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

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:

Abnormal airflow
Abnormal blood oxygen pressure
Abnormal blood oxygen pressure
Abnormal distribution of ventilation
Decreased blood oxygen pressure
Decreased Bohr effect
Decreased diffusion capacity of lung
Decreased forced expiratory volume
Decreased functional residual capacity
Decreased maximal voluntary ventilation
Decreased peak expiratory flow rate
Decreased total lung capacity
Decreased vital capacity
Diffusion capacity of lung above reference range
FEV1/FVC < 70 percent of predicted
FEV1/FVC > 70 percent of predicted
FEV1/FVC ratio abnormal
Finding of diffusion capacity of lung
Finding of diffusion capacity of lung
Forced expired volume - finding
Forced expired volume - finding
Forced vital capacity - finding
Forced vital capacity - finding
Forced vital capacity below reference range
FVC - forced vital capacity abnormal
High airway pressure
Increased blood oxygen pressure
Increased Bohr effect
Increased forced expiratory volume
Increased functional residual capacity
Increased maximal voluntary ventilation
Increased peak expiratory flow rate
Lung function restrictive
Lung function significantly obstructed
Lung function testing abnormal
Lung volume test abnormal
Peak expiratory flow rate - compliance moderate
Peak expiratory flow rate - compliance poor
Peak expiratory flow rate - finding
Peak expiratory flow rate - finding
Peak expiratory flow rate - finding
Peak expiratory flow rate - technique moderate
Peak expiratory flow rate - technique poor
Peak flow rate - finding
Peak flow rate - finding
Peak flow rate - finding
Peak flow rate - finding
Peak flow rate abnormal
Pendelluft
Regional ventilation differences
Regional ventilation differences due to gravity
Regional ventilation differences due to local airway resistance
Regional ventilation differences due to pleural pressure
Regional ventilation differences due to unequal bronchial pathway lengths
Regional ventilation differences due to unequal compliance
Regional ventilation differences due to unequal stress
Respiratory flow rate abnormal
Respiratory flow rate above reference range
Respiratory flow rate below reference range
Respiratory quotient - finding
Respiratory quotient abnormal
Serial peak expiratory flow rate abnormal
Spirometry reversibility finding
Spirometry reversibility positive
Vital capacity - finding

Clinical Classification

Clinical Category is Abnormal findings without diagnosis
CCSR Category Code: SYM017
Inpatient Default CCSR: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.
Outpatient Default CCSR: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Inclusion Terms

Reduced ventilatory capacity
Reduced vital capacity

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

- Abnormal, abnormality, abnormalities - See Also: Anomaly;
- - function studies
  - - pulmonary - R94.2
- - pulmonary
  - - test results - R94.2

- Diminished, diminution
- - vital capacity - R94.2

- Findings, abnormal, inconclusive, without diagnosis - See Also: Abnormal;
- - function study NEC - R94.8
  - - pulmonary - R94.2
- - scan NEC - R94.8
  - - lung - R94.2

- Reduced
- - ventilatory or vital capacity - R94.2

R94.2 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

MS-DRG	MS-DRG Title	MCD	Relative Weight
205	OTHER RESPIRATORY SYSTEM DIAGNOSES WITH MCC	04	1.8103
206	OTHER RESPIRATORY SYSTEM DIAGNOSES WITHOUT MCC	04	0.9135

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Convert R94.2 to ICD-9-CM

ICD-9-CM Code: 794.2 - Abn pulmonary func study

Patient Education

Lung Diseases

When you breathe, your lungs take in oxygen from the air and deliver it to the bloodstream. The cells in your body need oxygen to work and grow. During a normal day, you breathe nearly 25,000 times. People with lung disease have difficulty breathing. Millions of people in the U.S. have lung disease. If all types of lung disease are lumped together, it is the number three killer in the United States.

The term lung disease refers to many disorders affecting the lungs, such as asthma, COPD, infections like influenza, pneumonia and tuberculosis, lung cancer, and many other breathing problems. Some lung diseases can lead to respiratory failure.

Dept. of Health and Human Services Office on Women's Health

[Learn More in MedlinePlus]

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
FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

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.