2027 ICD-10-CM Diagnosis Code K85.80Other acute pancreatitis without necrosis or infection
ICD-10-CM Codes›K00–K95›K80-K87›K85
- Billable — Valid for Submission
- MCC — Major Complication or Comorbidity
- Not Chronic
K85.80 is a billable ICD-10-CM diagnosis code for other acute pancreatitis without necrosis or infection. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 438 through 440, 791, 793. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 24 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pancreatic disorders (excluding diabetes).
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute interstitial edematous pancreatitis
- Acute ischemic pancreatitis
- Acute on chronic pancreatitis
- Acute pancreatitis due to infection
- Acute pancreatitis due to systemic disease
- Autoimmune pancreatitis
- Autoimmune pancreatitis type 1
- Autoimmune pancreatitis type 2
- Hereditary pancreatitis
- Infectious pancreatitis
- Interstitial pancreatitis
- Ischemic pancreatitis
- Postoperative acute pancreatitis
- Traumatic acute pancreatitis
- Type 1 autoimmune pancreatitis with extrapancreatic involvement
- Viral acute pancreatitis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K85.80: its own notes plus those printed at K85 and Chapter 11. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- acute (recurrent) pancreatitis
- subacute pancreatitis
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may 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)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name K85.80, its category, or a range that includes it.
Code First 1
These codes say to code first a condition named in the note, and K85.80 is one of the conditions named.
- E08 Diabetes mellitus due to underlying condition
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Fitz's syndrome (acute hemorrhagic pancreatitis) See Also: Pancreatitis, acute; K85.80
Infection, infected, infective (opportunistic) B99.9
pancreas (acute) See: Pancreatitis, acute;
specified NEC See Also: Pancreatitis, acute; K85.80
Pancreatitis (annular) (apoplectic) (calcareous) (edematous) (hemorrhagic) (malignant) (subacute) (suppurative) K85.90
acute See Also: Pancreatitis, acute; K85.80
Suppuration, suppurative See Also: condition;
pancreas, acute See Also: Pancreatitis, acute; K85.80
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Acute Pancreatitis
an acute inflammatory process that leads to necrosis of the pancreatic parenchyma. signs and symptoms include severe abdominal pain, nausea, vomiting, diarrhea, fever, and shock. causes include alcohol consumption, presence of gallstones, trauma, and drugs.
Patient EducationClinical
Pancreatitis
The pancreas is a large gland behind the stomach and close to the first part of the small intestine. It secretes digestive juices into the small intestine through a tube called the pancreatic duct. The pancreas also releases the hormones insulin and glucagon into the bloodstream.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K85.80 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K85.80Overview
What is the ICD-10 code for other acute pancreatitis without necrosis or infection?
The ICD-10-CM code for other acute pancreatitis without necrosis or infection is K85.80 (sometimes written as K8580). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is K85.80 (Other acute pancreatitis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other acute pancreatitis without necrosis or infection on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K85.80 group to?
When other acute pancreatitis without necrosis or infection is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 440, 438, 439, with relative weights from 0.5966 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K85.80 a CC or MCC?
CMS lists K85.80 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 24 closely related codes in its exclusion list.
What is the ICD-9 equivalent of K85.80?
Under the General Equivalence Mappings, other acute pancreatitis without necrosis or infection converts to ICD-9-CM 577.0 (acute pancreatitis). The mapping is approximate, so confirm the match fits the documentation.
