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  3. Diagnosis Codes in MS-DRG 190 - Chronic Obstructive Pulmonary Disease With MCC

Diagnosis Codes in MS-DRG 190 - Chronic Obstructive Pulmonary Disease With MCC

The Medicare Severity Diagnosis-Related Group (MS-DRG) is a patient classification system used to categorize hospital cases based on clinical similarity and expected resource use. MS-DRGs organize all possible principal diagnoses into mutually exclusive groups known as Major Diagnostic Categories (MDCs), which help determine reimbursement under the Medicare Inpatient Prospective Payment System.

This section lists the diagnosis codes included in MS-DRG V42.0: Chronic Obstructive Pulmonary Disease with MCC from October 1, 2024, through September 30, 2025.

MS-DRG: 190

MS-DRG Title: Chronic Obstructive Pulmonary Disease with MCC

MCD: 04

Relative Weight: 1.1233 Relative Weight
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.

Geometric LOS: 1.12 Geometric Length of Stay
The geometric mean length of stay (GMLOS) is used by Medicare to calculate the reimbursement for patients whose medical treatment takes a much longer or shorter time than average.

Arithmetic LOS: 3.40 Arithmetic Length of Stay
The average length of stay (ALOS) reflects the average number of days a patient spends in a hospital for each admission.

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    • J42 - Unspecified chronic bronchitis

  • J41 - Simple and mucopurulent chronic bronchitis

    • J41.1 - Mucopurulent chronic bronchitis

    • J41.8 - Mixed simple and mucopurulent chronic bronchitis

  • J43 - Emphysema

    • J43.0 - Unilateral pulmonary emphysema [MacLeod's syndrome]

    • J43.1 - Panlobular emphysema

    • J43.2 - Centrilobular emphysema

    • J43.8 - Other emphysema

    • J43.9 - Emphysema, unspecified

  • J44 - Other chronic obstructive pulmonary disease

    • J44.0 - Chronic obstructive pulmonary disease with (acute) lower respiratory infection

    • J44.1 - Chronic obstructive pulmonary disease with (acute) exacerbation

    • J44.9 - Chronic obstructive pulmonary disease, unspecified

  • J44.8 - Other specified chronic obstructive pulmonary disease

    • J44.81 - Bronchiolitis obliterans and bronchiolitis obliterans syndrome

    • J44.89 - Other specified chronic obstructive pulmonary disease

  • J47 - Bronchiectasis

    • J47.0 - Bronchiectasis with acute lower respiratory infection

    • J47.1 - Bronchiectasis with (acute) exacerbation

    • J47.9 - Bronchiectasis, uncomplicated

  • J4A - Chronic lung allograft dysfunction

    • J4A.0 - Restrictive allograft syndrome

    • J4A.8 - Other chronic lung allograft dysfunction

    • J4A.9 - Chronic lung allograft dysfunction, unspecified

  • J68 - Respiratory conditions due to inhalation of chemicals, gases, fumes and vapors

    • J68.4 - Chronic respiratory conditions due to chemicals, gases, fumes and vapors

    • J68.8 - Other respiratory conditions due to chemicals, gases, fumes and vapors

    • J68.9 - Unspecified respiratory condition due to chemicals, gases, fumes and vapors

  • Q33 - Congenital malformations of lung

    • Q33.4 - Congenital bronchiectasis