C85.19 Unspecified B-cell lymphoma, extranodal and solid organ sites

The ICD-10-CM code for Unspecified B-cell lymphoma, extranodal and solid organ sites is C85.19 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

2: Neoplasms (C00-D49)

Section

C81-C96: Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)

Category C85

49 codes (44 billable)

FY2026 Status

Stable since FY2024

U.S. Hospital Utilization

• An estimated 3,525 U.S. inpatient stays in 2023 included C85.19 among the documented diagnoses.
• 1,175 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Tx of primary site (TOC entry)

a. Admission/Encounter for treatment of primary site ............................................................. 33

Tx of secondary site (TOC entry)

b. Admission/Encounter for treatment of secondary site .......................................................... 33

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

Cite This Page

Reference C85.19 with the canonical source and edition:

C85.19 — Unspecified B-cell lymphoma, extranodal and solid organ sites. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/C85.19

Canonical URL: https://icd10codingpro.com/codes/C85.19