2026 ICD-10-CM Diagnosis Code R57.9Shock, unspecified
ICD-10-CM Codes›R00–R99›R50-R69›R57
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 213
- Not Chronic
R57.9 is a billable ICD-10-CM diagnosis code for shock, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 291 through 293, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 48 closely related codes. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. Coders also document this condition as acute kidney injury due to circulatory failure. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Shock.
For Medicare Advantage risk adjustment, R57.9 maps to CMS-HCC Category 213 (Cardio-Respiratory Failure and Shock) under the V28 model, adding a risk factor of about 0.370 for a community, non-dual, aged beneficiary in payment year 2026.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
R57.9 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2026.
Source: CMS Payment Year 2026 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute kidney injury due to circulatory failure
- Cardiorenal syndrome
- Impending shock
- Prerenal renal failure
- Refractory shock
- Shock
- Shock caused by snake venom
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Failure of peripheral circulation NOS
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
circulatory (peripheral) R57.9
vascular (peripheral) R57.9
Shock R57.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Anaphylaxis
an acute hypersensitivity reaction due to exposure to a previously encountered antigen. the reaction may include rapidly progressing urticaria, respiratory distress, vascular collapse, systemic shock, and death.Cold Shock Proteins and Peptides
cellular proteins and peptides that are induced in response to cold stress. they are found in a broad variety of prokaryotic and eukaryotic organisms.Cold-Shock Response
a sequence of responses that occur when an organism is exposed to excessive cold. in humans, a fall in skin temperature triggers gasping, hypertension, and hyperventilation.Combat Disorders
neurotic reactions to unusual, severe, or overwhelming military stress.Convulsive Therapy
convulsions induced in order to treat mental disorders. it is used primarily in the treatment of severe affective disorders and schizophrenia.Electroconvulsive Therapy
electrically induced convulsions primarily used in the treatment of severe affective disorders and schizophrenia.Electroshock
induction of a stress reaction in experimental subjects by means of an electrical shock; applies to either convulsive or non-convulsive states.Extracorporeal Shockwave Therapy
a nonsurgical treatment that uses either high-energy shock waves or low energy acoustic waves to treat various musculoskeletal conditions (e.g., plantar fasciitis; tennis elbow). a probe placed on the skin conducts the shock waves thereby delivering a mechanical force to the body’s tissues.Heat-Shock Response
a sequence of responses that occur when an organism is exposed to excessive heat. in humans, an increase in skin temperature triggers muscle relaxation, sweating, and vasodilation.High-Energy Shock Waves
high-amplitude compression waves, across which density, pressure, and particle velocity change drastically. the mechanical force from these shock waves can be used for mechanically disrupting tissues and deposits.Insulin Coma
severe hypoglycemia induced by a large dose of exogenous insulin resulting in a coma or profound state of unconsciousness from which the individual cannot be aroused.Lithotripsy
the destruction of a calculus of the kidney, ureter, bladder, or gallbladder by physical forces, including crushing with a lithotriptor through a catheter. focused percutaneous ultrasound and focused hydraulic shock waves may be used without surgery. lithotripsy does not include the dissolving of stones by acids or litholysis. lithotripsy by laser is lithotripsy, laser.Lithotripsy, Laser
fragmentation of calculi, notably urinary or biliary, by laser.Osmotic Pressure
the pressure required to prevent the passage of solvent through a semipermeable membrane that separates a pure solvent from a solution of the solvent and solute or that separates different concentrations of a solution. it is proportional to the osmolality of the solution.Respiratory Distress Syndrome
a syndrome characterized by progressive life-threatening respiratory insufficiency in the absence of known lung diseases, usually following a systemic insult such as surgery or major trauma.Shock
a pathological condition manifested by failure to perfuse or oxygenate vital organs.Shock, Cardiogenic
shock resulting from diminution of cardiac output in heart disease.Shock, Hemorrhagic
acute hemorrhage or excessive fluid loss resulting in hypovolemia.Shock, Septic
sepsis associated with hypotension or hypoperfusion despite adequate fluid resuscitation. perfusion abnormalities may include but are not limited to lactic acidosis; oliguria; or acute alteration in mental status.Shock, Surgical
a type of shock that occurs as a result of a surgical procedure.Shock, Traumatic
shock produced as a result of trauma.Status Asthmaticus
a sudden intense and continuous aggravation of a state of asthma, marked by dyspnea to the point of exhaustion and collapse and not responding to the usual therapeutic efforts.Hypovolemia
an abnormally low volume of blood circulating through the body. it may result in hypovolemic shock (see shock).Cardiorenal Syndrome
a disorder of the heart and kidneys in which dysfunction of one of the organs induces dysfunction of the other organ.
Patient EducationClinical
Shock
Shock happens when not enough blood and oxygen can get to your organs and tissues. It causes very low blood pressure and may be life-threatening. It often happens along with a serious injury.
Read the full article at MedlinePlus
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Convert R57.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About R57.9Overview
What is the ICD-10 code for shock, unspecified?
The ICD-10-CM code for shock, unspecified is R57.9 (sometimes written as R579). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is R57.9 (Shock, not elsewhere classified) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report shock, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does R57.9 group to?
When shock, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 291, 292, 293, 791, 793, with relative weights from 0.5660 to 4.1696 depending on complications. Higher weights mean higher Medicare reimbursement.
Is R57.9 a CC or MCC?
CMS lists R57.9 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 48 closely related codes in its exclusion list.
Can R57.9 be a principal diagnosis?
Use it with care. This is a symptom code, so once a definitive diagnosis explaining the shock, unspecified is established, that condition takes the principal position instead.
What HCC is R57.9?
R57.9 (shock, unspecified) maps to CMS-HCC Category 213 (Cardio-Respiratory Failure and Shock), commonly written as HCC 213, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2026. It mapped to HCC 84 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. It does not map to any RxHCC in the Part D prescription drug model.
Does R57.9 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, R57.9 adds a risk adjustment factor of about 0.370 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.258 to 0.662 depending on the payment segment). A more severe related category (HCC 211 and HCC 212) supersedes it when both are reported. See the full factor table on the HCC 213 category page.
