ICDcodes.org
FY2027

K31.3 — Pylorospasm, not elsewhere classified

BillableUnspecified

Is K31.3 billable?

Yes, but K31.3 is an unspecified code. K31.3 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, K31.3 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 K31.3 — the more specific alternatives are listed below.

K31.3 at a glance

CodeK31.3
DescriptionPylorospasm, not elsewhere classified
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Which MS-DRGs does K31.3 group to?

K31.3 sits in MDC 06 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 391Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCCmedical
  • 392Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCCmedical

How is K31.3 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to K31.3. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • PylorospasmNEC (reflex)
  • Spasm, spastic, spasticity › pylorus NEC (s)
  • Obstruction, obstructed, obstructive › stomach NEC › due to pylorospasm

Excludes1 — never code together

The conditions below can never be reported together with K31.3 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • congenital or infantile pylorospasm (Q40.0)
  • neurotic pylorospasm (F45.8)
  • psychogenic pylorospasm (F45.8)

Excludes2 — not included here — inherited from Chapter 11

The conditions below are not part of K31.3, but a patient may have both at the same time. When documentation supports it, K31.3 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 K31.3, but a patient may have both at the same time. When documentation supports it, K31.3 and the excluded code may both be reported.

Excludes2 — not included here — inherited from K31

The conditions below are not part of K31.3, but a patient may have both at the same time. When documentation supports it, K31.3 and the excluded code may both be reported.

How long has K31.3 existed?

K31.3 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.

Which codes are confused with K31.3?

ICD-10-CM declares these codes mutually exclusive with K31.3 — exactly one of each pair can be correct for a given encounter.

Which conditions are coded to K31.3?

What other codes are in the K31 family? (11)