K35.32UpcomingBillable / specific

Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscess

Excludes 2 · 8

Chapters 11 · Diseases of the digestive system (K00-K95)

Excludes 2

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)

Claims & coverage

Coverage depends on the payer, service and applicable policy. A billable code does not guarantee payment.

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.

Official coding guidelines → · CMS ↗

Check Medicare coverage ↗

First observed · 2018-10-01

Code history

Latest recorded change · FY2023

ChangedUnchanged

FY2023

Effective from 2022-10-01

Title changed

Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscess

Previous title: Acute appendicitis with perforation and localized peritonitis, without abscess

Billable diagnosis code

CDC/NCHS · FY2023

All editions (16)

All editions	Effective from	Code history
FY2019	2018-10-01	Added
FY2020	2019-10-01	No tabular change
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	Title changed
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	No tabular change
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	No tabular change

Code-level instructions

Inclusion terms

(Acute) appendicitis with perforation NOS
Perforated appendix NOS
Ruptured appendix (with localized peritonitis) NOS

Inherited instructions

Chapters 11 · Diseases of the digestive system (K00-K95)

Excludes 2

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)

Official index references (12)

Appendicitis(pneumococcal) (retrocecal) (5)

Perforation, perforated(nontraumatic) (of) (4)

Perforation, perforated(nontraumatic) (of) › appendixDisease index
Perforation, perforated(nontraumatic) (of) › appendix › with localized peritonitisDisease index
Perforation, perforated(nontraumatic) (of) › cecumDisease index
Perforation, perforated(nontraumatic) (of) › cecum › with localized peritonitisDisease index

Peritonitis(adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) (1)

Peritonitis(adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) › with or following › appendicitis › with perforation or ruptureDisease index

Rupture, ruptured (2)

Rupture, ruptured › appendix(with peritonitis)Disease index
Rupture, ruptured › appendix(with peritonitis) › with localized peritonitisDisease index

Official conversion history

Historical assignments from the CDC conversion table support data retrieval. They do not authorize substituting a previous code for the current code.

Release dates 2018-10-01

Previous assignment: K35.3

Related codes

Other entries in the same category; these are not automatic substitutes.

Code	Description	Category · further specificity required
K35.30	Acute appendicitis with localized peritonitis, without perforation or gangrene	Billable / specific
K35.31	Acute appendicitis with localized peritonitis and gangrene, without perforation	Billable / specific
K35.33	Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess	Billable / specific

Official titles and instructions are preserved in their source language. Official sources ↗