ICD-10-CM 2027
ICD-10 code for pneumothorax NOS
From the official ICD-10-CM alphabetic index entry “Pneumothorax NOS”. Page updated September 29, 2026.
About coding pneumothorax NOS
The ICD-10-CM code for pneumothorax NOS is J93.9 (Pneumothorax, unspecified). The official index lists 15 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on J93.9.
Within J93, choose J93.9 (Pneumothorax, unspecified) only when documentation doesn't support a more specific option: spontaneous tension pneumothorax (J93.0), other spontaneous pneumothorax (J93.1) and other pneumothorax and air leak (J93.8).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 199 (Pneumothorax with MCC, relative weight 1.7322), DRG 200 (Pneumothorax with CC, relative weight 1.0774) and DRG 201 (Pneumothorax without CC/MCC, relative weight 0.6782), in MDC 04 (Diseases and Disorders of the Respiratory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific pneumothorax NOS codes (official index)
- acute J93.83 — Other pneumothorax
- chronic J93.81 — Chronic pneumothorax
- congenital P25.1 — Pneumothorax originating in the perinatal period
- perinatal period P25.1 — Pneumothorax originating in the perinatal period
- postprocedural J95.811 — Postprocedural pneumothorax
- specified NEC J93.83 — Other pneumothorax
- spontaneous NOS J93.83 — Other pneumothorax
- newborn P25.1 — Pneumothorax originating in the perinatal period
- primary J93.11 — Primary spontaneous pneumothorax
- secondary J93.12 — Secondary spontaneous pneumothorax
- tension J93.0 — Spontaneous tension pneumothorax
- tense valvular, infectional J93.0 — Spontaneous tension pneumothorax
- tension (spontaneous) J93.0 — Spontaneous tension pneumothorax
- traumatic S27.0 — Traumatic pneumothorax
- with hemothorax S27.2 — Traumatic hemopneumothorax
- tuberculous
Common questions about pneumothorax NOS ICD-10 codes
What is the ICD-10 code for pneumothorax NOS?
- J93.9 — Pneumothorax, unspecified. More specific codes apply when the documentation supports them: J93.83, J93.81, P25.1, P25.1 and others below.
What is the ICD-10 code for acute pneumothorax nos?
- J93.83 — Other pneumothorax.
What is the ICD-10 code for chronic pneumothorax nos?
- J93.81 — Chronic pneumothorax.
What is the ICD-10 code for congenital pneumothorax nos?
- P25.1 — Pneumothorax originating in the perinatal period.
What is the ICD-10 code for perinatal period pneumothorax nos?
- P25.1 — Pneumothorax originating in the perinatal period.
What is the ICD-10 code for postprocedural pneumothorax nos?
- J95.811 — Postprocedural pneumothorax.
What is the ICD-10 code for spontaneous nos pneumothorax nos?
- J93.83 — Other pneumothorax.
Is J93.9 billable?
- Yes. J93.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J93.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J93.9 as a principal diagnosis.
Is J93.9 a CC or MCC?
- J93.9 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.