ICDcodes.org
FY2027

K27.1 — Acute peptic ulcer, site unspecified, with perforation

BillableUnspecifiedMCC

Is K27.1 billable?

Yes, but K27.1 is an unspecified code. K27.1 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, K27.1 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting K27.1 — the more specific alternatives are listed below.

K27.1 at a glance

CodeK27.1
DescriptionAcute peptic ulcer, site unspecified, with perforation
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Which MS-DRGs does K27.1 group to?

K27.1 sits in MDC 06 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.

  • 380Complicated Peptic Ulcer with MCCmedical
  • 381Complicated Peptic Ulcer with CCmedical
  • 382Complicated Peptic Ulcer without CC/MCCmedical

As a secondary diagnosis, K27.1 is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.

How is K27.1 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to K27.1. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Ulcer, ulcerated, ulcerating, ulceration, ulcerative › peptic › acute › with › perforation

Excludes1 — never code together — inherited from K27

The conditions below can never be reported together with K27.1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • peptic ulcer of newborn (P78.82)

Use additional code — inherited from K27

Report an additional code alongside K27.1 to fully describe the condition. K27.1 is sequenced first.

  • code to identify:
  • alcohol abuse and dependence (F10.-)

Excludes2 — not included here — inherited from Chapter 11

The conditions below are not part of K27.1, but a patient may have both at the same time. When documentation supports it, K27.1 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)

Excludes2 — not included here — inherited from K20-K31

The conditions below are not part of K27.1, but a patient may have both at the same time. When documentation supports it, K27.1 and the excluded code may both be reported.

How long has K27.1 existed?

K27.1 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

What other codes are in the K27 family? (8)