M31.0 — Hypersensitivity angiitis

BillableCC

Is M31.0 billable?

Yes — M31.0 is billable for FY2027. M31.0 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. M31.0 may be submitted for encounters from October 1, 2026 through September 30, 2027.

M31.0 at a glance

Code	M31.0
Description	Hypersensitivity angiitis
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does M31.0 group to?

M31.0 sits in MDC 08 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.

545Connective Tissue Disorders with MCCmedical
546Connective Tissue Disorders with CCmedical
547Connective Tissue Disorders without CC/MCCmedical

As a secondary diagnosis, M31.0 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is M31.0 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to M31.0. They show the wording a clinician may have documented, which often differs from the Tabular description.

Goodpasture's syndrome
Angiitis › hypersensitivity
Arteritis › allergic
Disease, diseased › antiglomerular basement membraneantibody
Vasculitis › leukocytoclastic
Disorder › glomerular › Goodpasture's syndrome (of)
Glomerulonephritis › in › Goodpasture's syndrome
Nephritis, nephritic › antiglomerular basement membraneantibody NEC › in Goodpasture's syndrome (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)
Syndrome › pulmonary › renal

Inclusion terms

Alternative wording in documentation that is classified to M31.0.

Goodpasture's syndrome

Excludes1 — never code together — inherited from M30-M36

The conditions below can never be reported together with M31.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

autoimmune disease, single organ or single cell-type -code to relevant condition category

Excludes2 — not included here — inherited from Chapter 13

The conditions below are not part of M31.0, but a patient may have both at the same time. When documentation supports it, M31.0 and the excluded code may both be reported.

arthropathic psoriasis (L40.5-)
certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
compartment syndrome (traumatic) (T79.A-)
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 M31.0 existed?

M31.0 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 M31.0?

ICD-10-CM declares these codes mutually exclusive with M31.0 — exactly one of each pair can be correct for a given encounter.