What does ICD-10 code C86.0 mean?

ICD-10 code C86.0 is the standardized code used for extranodal nk/t-cell lymphoma, nasal type in medical records and coding systems.

When is ICD-10 code C86.0 used?

Doctors, hospitals, and insurers may use ICD-10 code C86.0 when recording extranodal nk/t-cell lymphoma, nasal type in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code C86.0 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code C86.0: Extranodal NK/T-cell lymphoma, nasal type

Name: ICD-10 Code C86.0: Extranodal NK/T-cell lymphoma, nasal type
Creator: HealthAssure Clinical Team
Published: 2026-05-26T05:25:39.445Z

C86.0 is an ICD-10 diagnosis entry used to group records related to Extranodal NK/T-cell lymphoma, nasal type. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Neoplasms (C00-D49).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Neoplasms (C00-D49).

When is it used?

May be used when a clinician documents extranodal nk/t-cell lymphoma, nasal type in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

2Neoplasms (C00-D49)

block

C00-C96Malignant neoplasms

block

C81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

OncologistGeneral Physician

Sibling codes

C86.1Hepatosplenic T-cell lymphoma C86.2Enteropathy-type (intestinal) T-cell lymphoma C86.3Subcutaneous panniculitis-like T-cell lymphoma C86.4Blastic NK-cell lymphoma C86.5Angioimmunoblastic T-cell lymphoma C86.6Primary cutaneous CD30-positive T-cell proliferations

Mapped diagnoses and classifications

SNOMED_CT 404135007high

Angiocentric NK/T-cell malignant lymphoma involving skin

Source: SNOMED International ICD-10 map

SNOMED_CT 414166008high

Extranodal NK/T-cell lymphoma, nasal type

Source: SNOMED International ICD-10 map

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.

Legacy codes

C86.0

Replacement codes

C86.00 — Extranodal NK/T-cell lymphoma, nasal type not having achieved remissionC86.01 — Extranodal NK/T-cell lymphoma, nasal type, in remission

Common synonyms

Extranodal NK/T-cell lymphoma, nasal type

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.