Is ICD-10-CM code M32 billable?

No, M32 (Systemic lupus erythematosus (SLE)) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code M32 belong to?

M32 belongs to Chapter 13 of the ICD-10-CM tabular list: M00–M99 (Diseases of the Musculoskeletal System and Connective Tissue).

M32Not billable, use a more specific code below

Systemic lupus erythematosus (SLE)

In Systemic connective tissue disorders (M30-M36), chapter 13: Diseases of the Musculoskeletal System and Connective Tissue

10 billable codes under M32: 2 are a CC; 9 map to HCC 94 (Systemic Lupus Erythematosus and Other Specified Systemic Connective Tissue Disorders), HCC 280 (Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.

Instructional notes

Excludes1: not coded here, use a different code

lupus erythematosus (discoid) (NOS) (L93.0)

Also applies, from Systemic connective tissue disorders (M30-M36)

These notes sit on M30-M36 and apply to every code under it, including M32.

Includes: conditions that are coded here

autoimmune disease NOS
collagen (vascular) disease NOS
systemic autoimmune disease
systemic collagen (vascular) disease

Excludes1: not coded here, use a different code

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

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers site and laterality, acute injury versus chronic musculoskeletal conditions, 7th characters for pathologic fractures, osteoporosis with or without current fracture, and multisystem inflammatory syndrome.

Site and laterality (page 60)
Acute traumatic versus chronic or recurrent musculoskeletal conditions (page 61)
Coding of Pathologic Fractures (page 61)
Osteoporosis (page 61)
Multisystem Inflammatory Syndrome (page 62)

Read Section I.C.13 (page 60)

All codes under M32

M32 can't be used on a claim. Pick a billable code below; grey headings group them.

M32 MS-DRGs

As the principal diagnosis, all 10 billable codes under M32 group to MS-DRG 545, 546, or 547 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to M32

Notes on these codes point to M32.

A18.4 Excludes2: systemic lupus erythematosus (M32.-)
D59.39 Code Also: systemic lupus erythematosus (M32.-)
F02 Code First: systemic lupus erythematosus (M32.-)
F06.7 Code First: systemic lupus erythematosus (M32.-)
L93 Excludes1: systemic lupus erythematosus (M32.-)
M60-M63 Excludes1: myopathy in systemic lupus erythematosus (M32.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Lupus

Lupus is a chronic (long-lasting) type of autoimmune disease. Autoimmune diseases happen when your immune system attacks healthy cells and tissues by mistake. This attack causes inflammation. It can also damage many parts of the body, including the joints, skin, kidneys, heart, lungs, and brain.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.