Is C96.5 a billable ICD-10-CM code?

Yes. C96.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C96.5 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).

What cannot be coded together with C96.5?

C96.5 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

C96.5

C96.5 — Multifocal and unisystemic Langerhans-cell histiocytosis

Billable / specific codeICD-10-CM

C96.5 is a billable, specific ICD-10-CM code for multifocal and unisystemic langerhans-cell histiocytosis. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

multifocal and multisystemic (disseminated) Langerhans-cell histiocytosis (C96.0)
unifocal Langerhans-cell histiocytosis (C96.6)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Hand-Schüller-Christian disease
Histiocytosis X, multifocal

Other codes that can never be billed with C96.5

These codes carry an Excludes1 note pointing at C96.5. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C96.5 alone.

C96.0Multifocal and multisystemic (disseminated) Langerhans-cell histiocytosis
C96.6Unifocal Langerhans-cell histiocytosis
D76Other specified diseases with participation of lymphoreticular and reticulohistiocytic tissue

Risk adjustment

C96.5 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 21 Lymphoma and Other Cancers0.671 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

C96.5 is named in 21 Medicare coverage policies — 21 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A54768Billing and Coding: Cardiac Blood Pool Imaging (Multiple Gated Acquisition Scanning- MUGA, Ventriculography) When Performed in Conjunction with Cardiotoxic Chemotherapy
A56421Billing and Coding: CT of the Abdomen and Pelvis
A57224Billing and Coding: Respiratory Care
A57630Billing and Coding: Percutaneous Vertebral Augmentation (PVA) for Vertebral Compression Fracture (VCF)

How C96.5 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to C96.5.

Hand-Schüller-Christian disease or syndrome
Schüller-Christian disease or syndrome
Syndrome›Schüller-Christian
Xanthoma›bone(generalisata)
Histiocytosis›X NEC›multifocal
Histiocytosis›Langerhans' cell NEC›multifocal X›unisystemic

Related codes at this level

Codes that share C96. If C96.5 is not quite right, the correct code is usually one of these.

Questions about C96.5

Is C96.5 a billable ICD-10-CM code?: Yes. C96.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C96.5 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).
What cannot be coded together with C96.5?: C96.5 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.