AutoICD API

K65.9

Billable

Peritonitis, unspecified

Peritonitis, unspecified

Status

Billable / Specific

Block

K65-K68

Parent Code

K65

Coding Notes

Inclusion Terms

Alternative clinical terms for this condition

  • Bacterial peritonitis NOS

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

  • acute appendicitis with generalized peritonitis (K35.2-)
  • aseptic peritonitis (T81.6)
  • benign paroxysmal peritonitis (E85.0)
  • chemical peritonitis (T81.6)
  • gonococcal peritonitis (A54.85)
  • neonatal peritonitis (P78.0-P78.1)
  • pelvic peritonitis, female (N73.3-N73.5)
  • periodic familial peritonitis (E85.0)
  • peritonitis due to talc or other foreign substance (T81.6)
  • peritonitis in chlamydia (A74.81)
  • peritonitis in diphtheria (A36.89)
  • peritonitis in syphilis (late) (A52.74)
  • peritonitis in tuberculosis (A18.31)
  • peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0)
  • peritonitis with or following appendicitis (K35.-)
  • puerperal peritonitis (O85)
  • retroperitoneal infections (K68.-)

Excludes 2

Conditions not included here, but the patient may have both

  • 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)

Use Additional Code

Additional codes that should follow this code

  • code (B95-B97), to identify infectious agent, if known

Code Also

A second code may be required; sequencing depends on circumstances

  • if applicable diverticular disease of intestine (K57.-)

Also Known As / Clinical Terms

SNOMED CT

UMLS

Frequently Asked Questions

What is the ICD-10 code for peritonitis, unspecified?

The ICD-10-CM code for peritonitis, unspecified is K65.9. The full clinical description is "Peritonitis, unspecified". K65.9 is a billable/specific code that can be used on insurance claims and medical billing.

What does ICD-10 code K65.9 mean?

ICD-10-CM code K65.9 represents "Peritonitis, unspecified". It is classified under Chapter 11: Diseases of the Digestive System and is a billable/specific code that can be used on a claim.

Is K65.9 a billable code?

Yes, K65.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.

What chapter is K65.9 in?

K65.9 is in Chapter 11: Diseases of the Digestive System (codes K00-K95).

What codes cannot be used with K65.9?

K65.9 has Excludes1 notes indicating codes that cannot be used together with it, including: acute appendicitis with generalized peritonitis (K35.2-); aseptic peritonitis (T81.6); benign paroxysmal peritonitis (E85.0); and 14 more.

Are additional codes required with K65.9?

Yes, when using K65.9 you should also code: code (B95-B97), to identify infectious agent, if known.

What SNOMED CT codes does K65.9 map to?

K65.9 maps to 15 SNOMED CT concepts: 1163087003, 838354003, 213293008, 197171003, 111368002, and 10 more. SNOMED CT is a clinical terminology used in electronic health records.

What are the UMLS CUIs for K65.9?

K65.9 is linked to 2 UMLS Concept Unique Identifiers: C0275550, C0031154. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

Automate ICD-10 Coding With AI

Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.

Try FreeView API Docs

Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.