ICD-10 Code
International Classification of Diseases, 10th Revision
Aug 20, 2017

See: Peritonitis

  ICD-10 Code for Peritonitis, unspecified K65.9

K65.9 is a valid1 ICD 10 diagnosis code.

K65.9 is valid for submission for HIPAA-covered transactions.

Chapter 11 Diseases of the digestive system (K00-K95)
Section K65-K68 Diseases of peritoneum and retroperitoneum (K65-K68)
Category K65 Peritonitis

• See below for any additional coding requirements that may be necessary.

• Check for any notations, inclusions and/or exclusions that are specific to this ICD 10 code before using

1 No additional coding requirements necessary.
Inclusion Term
  • Bacterial peritonitis NOS
See also ICD 10 code for

Related Terms to “Peritonitis, unspecified”

  • Fistula(cutaneous) - L98.8
    • peritoneum - K65.9
  • Hemoperitoneum - K66.1
    • infectional - K65.9
  • Peritonitis(adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) - K65.9
See the 2017 ICD-10-CM Coding Guidelines.

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.