K85.12 — Biliary acute pancreatitis with infected necrosis
Is K85.12 billable?
Yes — K85.12 is billable for FY2027. K85.12 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. K85.12 may be submitted for encounters from October 1, 2026 through September 30, 2027.
K85.12 at a glance
| Code | K85.12 |
|---|---|
| Description | Biliary acute pancreatitis with infected necrosis |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does K85.12 group to?
K85.12 sits in MDC 07 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 438Disorders of Pancreas Except Malignancy with MCCmedical
- 439Disorders of Pancreas Except Malignancy with CCmedical
- 440Disorders of Pancreas Except Malignancy without CC/MCCmedical
As a secondary diagnosis, K85.12 is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is K85.12 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to K85.12. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Pancreatitis › gallstone › with necrosis › infected (annular) (apoplectic) (calcareous) (edematous) (hemorrhagic) (malignant) (subacute) (suppurative)
- Pancreatitis › acute › biliary › with necrosis › infected (annular) (apoplectic) (calcareous) (edematous) (hemorrhagic) (malignant) (subacute) (suppurative)
- Pancreatitis › acute › gallstone › with necrosis › infected (annular) (apoplectic) (calcareous) (edematous) (hemorrhagic) (malignant) (subacute) (suppurative)
Excludes2 — not included here — inherited from Chapter 11
The conditions below are not part of K85.12, but a patient may have both at the same time. When documentation supports it, K85.12 and the excluded code may both be reported.
- 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)
How long has K85.12 existed?
K85.12 first appears in FY2018 (FY2017 is not available, so it may have appeared then).
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.