MS-DRG 203 – Bronchitis and Asthma without CC/MCC
A Medical DRG in MDC 04 (Diseases & Disorders of the Respiratory System). Inpatient cases group to DRG 203 when the ICD-10-CM principal diagnosis is one of the 47 codes listed below and no secondary diagnosis on the CC or MCC lists is present. Its FY 2026 relative weight is 0.6700 with a geometric mean length of stay of 2.2 days.
Severity family
The grouper first assigns the case to MDC 04 from the principal diagnosis and finds no qualifying operating-room procedure (this is a Medical DRG; ICD-10-PCS codes do not drive assignment here), then applies the severity split from secondary diagnoses: with CC/MCC → 202; without CC/MCC → 203.
Principal Diagnosis Codes 47 codes · 9 categories
A37 Whooping cough8 codes
- A37.00 Whooping cough due to Bordetella pertussis without pneumonia
- A37.01 Whooping cough due to Bordetella pertussis with pneumonia
- A37.10 Whooping cough due to Bordetella parapertussis without pneumonia
- A37.11 Whooping cough due to Bordetella parapertussis with pneumonia
- A37.80 Whooping cough due to other Bordetella species without pneumonia
- A37.81 Whooping cough due to other Bordetella species with pneumonia
- A37.90 Whooping cough, unspecified species without pneumonia
- A37.91 Whooping cough, unspecified species with pneumonia
J04 Acute laryngitis and tracheitis2 codes
J20 Acute bronchitis10 codes
- J20.0 Acute bronchitis due to Mycoplasma pneumoniae
- J20.1 Acute bronchitis due to Hemophilus influenzae
- J20.2 Acute bronchitis due to streptococcus
- J20.3 Acute bronchitis due to coxsackievirus
- J20.4 Acute bronchitis due to parainfluenza virus
- J20.5 Acute bronchitis due to respiratory syncytial virus
- J20.6 Acute bronchitis due to rhinovirus
- J20.7 Acute bronchitis due to echovirus
- J20.8 Acute bronchitis due to other specified organisms
- J20.9 Acute bronchitis, unspecified
J21 Acute bronchiolitis4 codes
J39 Other diseases of upper respiratory tract1 code
- J39.8 Other specified diseases of upper respiratory tract
J40 Bronchitis, not specified as acute or chronic1 code
- J40 Bronchitis, not specified as acute or chronic
J41 Simple and mucopurulent chronic bronchitis1 code
- J41.0 Simple chronic bronchitis
J45 Asthma18 codes
- J45.20 Mild intermittent asthma, uncomplicated
- J45.21 Mild intermittent asthma with (acute) exacerbation
- J45.22 Mild intermittent asthma with status asthmaticus
- J45.30 Mild persistent asthma, uncomplicated
- J45.31 Mild persistent asthma with (acute) exacerbation
- J45.32 Mild persistent asthma with status asthmaticus
- J45.40 Moderate persistent asthma, uncomplicated
- J45.41 Moderate persistent asthma with (acute) exacerbation
- J45.42 Moderate persistent asthma with status asthmaticus
- J45.50 Severe persistent asthma, uncomplicated
- J45.51 Severe persistent asthma with (acute) exacerbation
- J45.52 Severe persistent asthma with status asthmaticus
- J45.901 Unspecified asthma with (acute) exacerbation
- J45.902 Unspecified asthma with status asthmaticus
- J45.909 Unspecified asthma, uncomplicated
- J45.990 Exercise induced bronchospasm
- J45.991 Cough variant asthma
- J45.998 Other asthma
Procedure Codes
Frequently Asked Questions
What is MS-DRG 203?
MS-DRG 203 (Bronchitis and Asthma without CC/MCC) is a medical DRG in MDC 04 (Diseases & Disorders of the Respiratory System). Its FY 2026 relative weight is 0.6700 with a geometric mean length of stay of 2.2 days.
What is the difference between DRG 202, 203?
All 2 share the same base category; the severity of secondary diagnoses separates them: 202 (with CC/MCC), 203 (without CC/MCC). A major complication or comorbidity (MCC) places the case in the highest-weighted DRG of the family; a CC in the middle; neither in the lowest.
How many diagnosis codes group to DRG 203?
47 ICD-10-CM principal diagnosis codes group to this DRG, spanning 9 three-character categories.
What is the relative weight of DRG 203?
The FY 2026 relative weight of this DRG is 0.6700, meaning reimbursement of roughly 0.67 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.
