2027 ICD-10-CM Diagnosis Code M36.4Arthropathy in hypersensitivity reactions classified elsewhere
ICD-10-CM Codes›M00–M99›M30-M36›M36
- Billable — Valid for Submission
- Not Chronic
M36.4 is a billable ICD-10-CM diagnosis code for arthropathy in hypersensitivity reactions classified elsewhere. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 553 through 554. The code is a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as arthralgia due to immunoglobulin A vasculitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Allergic reactions and Other specified joint disorders.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for M36.4.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Arthralgia due to immunoglobulin A vasculitis
- Arthritis due to immunoglobulin A vasculitis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M36.4: its own notes plus those printed at M36, block M30-M36, and Chapter 13. 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.
- autoimmune disease NOS
- collagen (vascular) disease NOS
- systemic autoimmune disease
- systemic collagen (vascular) disease
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- autoimmune disease, single organ or single cell-type -code to relevant condition category
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.
- arthropathies in diseases classified elsewhere (M14.-)
- 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)
Code First
The underlying condition named in the note is sequenced before this code.
Notes
General instructions on how these codes are used.
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name M36.4, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming M36.4: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 4
These codes carry an Excludes2 note naming M36.4: its condition is not part of those codes, and both may be reported when the patient has both.
- Chapter 9 (I00-I99) Diseases of the circulatory system
- I77 Other disorders of arteries and arterioles
- J82 Pulmonary eosinophilia, not elsewhere classified
- Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue
Code First 1
These codes say to code first a condition named in the note, and M36.4 is one of the conditions named.
- J84.170 Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Joint Disorders
Your joints are places where two or more bones come together. Your shoulders, elbows, hips, knees, and knuckles are all joints. Your spine has joints, too.
The full article covers:
- What are joints?
- What are joint disorders?
- What diseases can affect the joints?
- What types of joint disorders happen from sudden injuries?
- What types of joint disorders happen from overuse?
- How can I keep my joints healthy?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M36.4 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M36.4Overview
What is the ICD-10 code for arthropathy in hypersensitivity reactions classified elsewhere?
The ICD-10-CM code for arthropathy in hypersensitivity reactions classified elsewhere is M36.4 (sometimes written as M364). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M36.4 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report arthropathy in hypersensitivity reactions classified elsewhere on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M36.4 group to?
On inpatient claims, arthropathy in hypersensitivity reactions classified elsewhere maps to MS-DRG 554, 553, with relative weights from 0.8328 to 1.2492 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M36.4 be a principal diagnosis?
No. This is a manifestation code: arthropathy in hypersensitivity reactions classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
