R57.9 Shock, unspecified

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Failure of peripheral circulation NOS

Applies from R57 Shock, not elsewhere classified

Excludes1 (never code together)

• anaphylactic shock NOS (T78.2)
• anaphylactic reaction or shock due to adverse food reaction (T78.0-)
• anaphylactic shock due to adverse effect of correct drug or medicament properly administered (T88.6)
• anaphylactic shock due to serum (T80.5-)
• electric shock (T75.4)
• obstetric shock (O75.1)
• postprocedural shock (T81.1-)
• psychic shock (F43.0)
• shock complicating or following ectopic or molar pregnancy (O00-O07, O08.3)
• shock due to anesthesia (T88.2)
• shock due to lightning (T75.01)
• traumatic shock (T79.4)
• toxic shock syndrome (A48.3)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 213 — Cardio-Respiratory Failure and Shock
• CMS-HCC V22: HCC 84 — Cardio-Respiratory Failure and Shock
• ESRD V24: HCC 84

MS-DRG index

Defines the logic of DRG(s) 291-293 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 785.50 Shock, unspecified

Code annotations containing back-references to R57.9

Back-references to R57.9

• Code First: I21.A1 Myocardial infarction type 2 ("shock (R57.0-R57.9)")
• Type 1 Excludes: I95 Hypotension ("cardiovascular collapse (R57.9)")
• Type 1 Excludes: R55 Syncope and collapse ("shock NOS (R57.9)")
• Type 1 Excludes: T79.4 Traumatic shock ("shock NOS (R57.9)")

Back-references to R57

• Use Additional: G90.81 Serotonin syndrome ("shock, not elsewhere classified (R57.-)")
• Type 1 Excludes: T79.4 Traumatic shock ("nontraumatic shock NEC (R57.-)")

Diagnosis Index entries for R57.9

• Circulation › failure (peripheral)
• Collapse › circulatory (peripheral)
• Collapse › vascular (peripheral)
• Failure, failed › circulation, circulatory (peripheral)
• Shock

Nearby codes

• R57 Shock, not elsewhere classified
• R57.0 Cardiogenic shock
• R57.1 Hypovolemic shock
• R57.8 Other shock
• R57.9 Shock, unspecified (this code)