2020 ICD-10-CM Diagnosis Code K66.1

Hemoperitoneum

    2016 2017 2018 2019 2020 Billable/Specific Code
  • K66.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM K66.1 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of K66.1 - other international versions of ICD-10 K66.1 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as K66.1. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • traumatic hemoperitoneum (
    ICD-10-CM Diagnosis Code S36.8

    Injury of other intra-abdominal organs

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    S36.8-
    )
The following code(s) above K66.1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to K66.1:
  • K00-K95
    2020 ICD-10-CM Range K00-K95

    Diseases of the digestive system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the digestive system
  • K66
    ICD-10-CM Diagnosis Code K66

    Other disorders of peritoneum

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • ascites (R18.-)
    • peritoneal effusion (chronic) (R18.8)
    Other disorders of peritoneum
Approximate Synonyms
  • Hematoma, retroperitoneal
  • Hemorrhage into peritoneal cavity
  • Intraperitoneal hemorrhage
  • Nontraumatic hemoperitoneum
  • Retroperitoneal hematoma
Clinical Information
  • Accumulations of blood in the peritoneal cavity due to internal hemorrhage.
  • Bleeding originating from the peritoneum.
ICD-10-CM K66.1 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 393 Other digestive system diagnoses with mcc
  • 394 Other digestive system diagnoses with cc
  • 395 Other digestive system diagnoses without cc/mcc
  • 791 Prematurity with major problems
  • 793 Full term neonate with major problems

Convert K66.1 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to K66.1:
  • Hematoma (traumatic) (skin surface intact) - see also Contusion
  • Hemoperitoneum K66.1
  • Hemorrhage, hemorrhagic (concealed) R58
    ICD-10-CM Diagnosis Code R58

    Hemorrhage, not elsewhere classified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Hemorrhage NOS
    Type 1 Excludes
    • hemorrhage included with underlying conditions, such as:
    • acute duodenal ulcer with hemorrhage (K26.0)
    • acute gastritis with bleeding (K29.01)
    • ulcerative enterocolitis with rectal bleeding (K51.01)
    • intrapelvic
      • male K66.1
    • intraperitoneal K66.1
    • mesentery K66.1
    • omentum K66.1
    • peritoneum, peritoneal K66.1

ICD-10-CM Codes Adjacent To K66.1
K65 Peritonitis
K65.0 Generalized (acute) peritonitis
K65.1 Peritoneal abscess
K65.2 Spontaneous bacterial peritonitis
K65.3 Choleperitonitis
K65.4 Sclerosing mesenteritis
K65.8 Other peritonitis
K65.9 Peritonitis, unspecified
K66 Other disorders of peritoneum
K66.0 Peritoneal adhesions (postprocedural) (postinfection)
K66.1 Hemoperitoneum
K66.8 Other specified disorders of peritoneum
K66.9 Disorder of peritoneum, unspecified
K67 Disorders of peritoneum in infectious diseases classified elsewhere
K68 Disorders of retroperitoneum
K68.1 Retroperitoneal abscess
K68.11 Postprocedural retroperitoneal abscess
K68.12 Psoas muscle abscess
K68.19 Other retroperitoneal abscess
K68.9 Other disorders of retroperitoneum
K70 Alcoholic liver disease

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.