MS-DRG v44.0 · MDC 04: Diseases and Disorders of the Respiratory System
199 — Pneumothorax with MCC
- Relative weight
- 1.7322
- Geometric mean LOS
- 4.7 days
- Arithmetic mean LOS
- 6.1 days
- Type
- Medical
About MS-DRG 199
MS-DRG 199, Pneumothorax with MCC, is a medical DRG in MDC 04 (Diseases and Disorders of the Respiratory System) under MS-DRG version 44.0, which applies to inpatient discharges from October 1, 2026 through September 30, 2027.
Its FY2027 relative weight is 1.7322, so Medicare's base payment for this DRG is about 1.73 times the average inpatient case, before hospital-specific adjustments. The geometric mean length of stay is 4.7 days and the arithmetic mean is 6.1 days.
It belongs to a 3-level severity family: DRG 199 (with MCC, weight 1.7322), DRG 200 (with CC, weight 1.0774) and DRG 201 (without CC/MCC, weight 0.6782). The highest-severity level carries 2.6 times the weight of the lowest, which is why documenting CC and MCC conditions matters.
14 ICD-10-CM diagnosis codes are part of this DRG's grouping logic; they are listed below.
ICD-10-CM codes that group to DRG 199 (14)
Chapter 10: Diseases of the respiratory system
- J93.0Spontaneous tension pneumothorax
- J93.11Primary spontaneous pneumothorax
- J93.12Secondary spontaneous pneumothorax
- J93.81Chronic pneumothorax
- J93.82Other air leak
- J93.83Other pneumothorax
- J93.9Pneumothorax, unspecified
- J95.811Postprocedural pneumothorax
- J95.812Postprocedural air leak
- J98.2Interstitial emphysema
Chapter 19: Injury, poisoning and certain other consequences of external causes
Common questions about DRG 199
What is the relative weight of DRG 199?
- 1.7322 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 199?
- The geometric mean length of stay is 4.7 days; the arithmetic mean is 6.1 days.
Is DRG 199 medical or surgical?
- DRG 199 is a medical DRG.