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    OpenPayerBilling CodesAbnormal findings on examination of other body fluids, substances and tissues, without diagnosisICD-10-CM r84-abnormal-respiratory-specimen-findings
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    ICD-10-CM Code For Abnormal Findings In Specimens From Respiratory Organs And Thorax: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group R84 includes abnormal or unexpected laboratory and cytologic findings from specimens obtained from the respiratory organs and thorax, reported when a definitive diagnosis has not been established. These ICD-10-CM diagnosis codes are used to document clinical scenarios where test results indicate abnormal cellular, microbiologic, or biochemical findings without an assigned disease name, capturing diagnostic uncertainty and specimen-specific abnormalities. Accurate coding within the ICD-10-CM R84 group supports complete clinical documentation and appropriate reimbursement.

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    ICD-10-CM R84: Abnormal Findings In Specimens From Respiratory Organs And Thorax Overview

    This group represents abnormal laboratory or cytologic findings identified in specimens taken from the respiratory system and thoracic structures, reported when no definitive diagnosis has been established. It targets tests such as sputum, bronchial washings, pleural fluid, and other thoracic specimen analyses that reveal unexpected or atypical results. Accurate coding matters because it documents diagnostic uncertainty or abnormal test findings that can affect clinical decision making and support appropriate reimbursement when no confirmed diagnosis is yet available.

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    When to Use

    Use a code from this group when laboratory or cytologic testing of respiratory or thoracic specimens yields abnormal results but no definitive diagnosis is established. These codes document abnormal test findings to reflect diagnostic uncertainty and support clinical record accuracy.

    ICD-10-CM Codes

    10 rows

    ICD-10-CM CodeDescription
    R84.0Abnormal level of enzymes in specimens from respiratory organs and thorax
    R84.1Abnormal level of hormones in specimens from respiratory organs and thorax
    R84.2Abnormal level of other drugs, medicaments and biological substances in specimens from respiratory organs and thorax
    R84.3Abnormal level of substances chiefly nonmedicinal as to source in specimens from respiratory organs and thorax
    R84.4Abnormal immunological findings in specimens from respiratory organs and thorax
    R84.5Abnormal microbiological findings in specimens from respiratory organs and thorax
    R84.6Abnormal cytological findings in specimens from respiratory organs and thorax
    R84.7Abnormal histological findings in specimens from respiratory organs and thorax
    R84.8Other abnormal findings in specimens from respiratory organs and thorax
    R84.9Unspecified abnormal finding in specimens from respiratory organs and thorax

    DRG Codes

    2 rows

    DRG CodeDescription
    947Signs and Symptoms with MCC
    948Signs and Symptoms without MCC

    Typical Clinical Scenarios

    • An adult smoker presents to the outpatient pulmonary clinic with a persistent cough and hemoptysis; sputum cytology returns atypical squamous cells suspicious for malignancy but without a confirmed diagnosis. The clinician documents an abnormal cytologic finding of respiratory specimen pending further workup (biopsy/imaging), so a code from this group is assigned to report the abnormal specimen result. Typical codes: R84.1, R84.9
    • A hospitalized patient with suspected ventilator-associated pneumonia has tracheal aspirate sent for culture and Gram stain; the laboratory report shows presence of numerous inflammatory cells and bacterial organisms but no definitive organism identified on initial testing. Because the specimen from the respiratory organ demonstrates abnormal findings without an established infectious diagnosis at that time, an appropriate code from this group is used on the problem list while awaiting confirmatory identification. Typical codes: R84.3, R84.5
    • An outpatient with chronic interstitial lung disease undergoes bronchoalveolar lavage during surveillance bronchoscopy; cytology reveals macrophages laden with hemosiderin consistent with pulmonary hemorrhage, but the underlying cause is not determined during the visit. The abnormal laboratory/pathology finding in the thoracic specimen is reported using a code from this group to capture the unexpected specimen result separate from the underlying ILD diagnosis. Typical codes: R84.6, R84.2

    Related Codes

    R83-ABNORMAL-FINDINGS-CEREBROSPINAL-FLUID

    ICD-10-CM Code For Abnormal Findings In Cerebrospinal Fluid: Group Overview

    R85-ABNORMAL-FINDINGS-DIGESTIVE-ORGANS

    ICD-10-CM Code For Abnormal Findings In Specimens From Digestive Organs And Abdominal Cavity: Group Overview

    R86-ABNORMAL-FINDINGS-MALE-GENITAL-ORGANS

    ICD-10-CM Code For Abnormal Findings In Specimens From Male Genital Organs: Group Overview

    R87-ABNORMAL-FINDINGS-FEMALE-GENITAL

    ICD-10-CM Code For Abnormal Findings In Specimens From Female Genital Organs: Group Overview

    R88-ABNORMAL-FINDINGS-IN-BODY-FLUIDS

    ICD-10-CM Code For Abnormal Findings In Other Body Fluids And Substances: Group Overview

    R89-ABNORMAL-FINDINGS-IN-SPECIMENS

    ICD-10-CM Code For Abnormal Findings In Specimens From Other Organs Systems And Tissues: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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