C83.00 is the authoritative medical code for Small cell B-cell lymphoma, unspecified site. This classification is used in medical billing and clinical recording to specify the clinical criteria for small cell b-cell lymphoma, unspecified site (ICD-10-CM C83.00), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Small cell B-cell lymphoma, unspecified site is a billable ICD-10-CM diagnosis code C83.00. Excludes1 (not coded here): chronic lymphocytic leukemia C91.1; mature T/NK-cell lymphomas C84.-; Waldenström macroglobulinemia C88.00; personal history of non-Hodgkin lymphoma Z85.72. Excludes2 (not included here): Kaposi's sarcoma of lymph nodes C46.3; secondary and unspecified neoplasm of lymph nodes C77.-; secondary neoplasm of bone marrow C79.52; secondary neoplasm of spleen C78.89.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for C83.00 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- chronic lymphocytic leukemia C91.1
- mature T/NK-cell lymphomas C84.-
- Waldenström macroglobulinemia C88.00
- personal history of non-Hodgkin lymphoma Z85.72
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- Kaposi's sarcoma of lymph nodes C46.3
- secondary and unspecified neoplasm of lymph nodes C77.-
- secondary neoplasm of bone marrow C79.52
- secondary neoplasm of spleen C78.89
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with C83.00?
Per Excludes1 instructions, C83.00 must not be reported with: chronic lymphocytic leukemia (C91.1); mature T/NK-cell lymphomas (C84.-); Waldenström macroglobulinemia (C88.00); personal history of non-Hodgkin lymphoma (Z85.72).
Can C83.00 be reported alongside related conditions?
Per Excludes2 instructions, C83.00 and the following may both be reported when both are present: Kaposi's sarcoma of lymph nodes (C46.3); secondary and unspecified neoplasm of lymph nodes (C77.-); secondary neoplasm of bone marrow (C79.52); secondary neoplasm of spleen (C78.89).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as C83.00, with their registry titles.
- C83 — Non-follicular lymphoma
- C83.0 — Small cell B-cell lymphoma
- C83.01 — Small cell B-cell lymphoma, lymph nodes of head, face, and neck
- C83.02 — Small cell B-cell lymphoma, intrathoracic lymph nodes
- C83.03 — Small cell B-cell lymphoma, intra-abdominal lymph nodes
- C83.04 — Small cell B-cell lymphoma, lymph nodes of axilla and upper limb
- C83.05 — Small cell B-cell lymphoma, lymph nodes of inguinal region and lower limb
- C83.06 — Small cell B-cell lymphoma, intrapelvic lymph nodes
- C83.07 — Small cell B-cell lymphoma, spleen
- C83.08 — Small cell B-cell lymphoma, lymph nodes of multiple sites
- C83.09 — Small cell B-cell lymphoma, extranodal and solid organ sites
- C83.0A — Small cell B-cell lymphoma, in remission
- C83.1 — Mantle cell lymphoma
- C83.10 — Mantle cell lymphoma, unspecified site
- C83.11 — Mantle cell lymphoma, lymph nodes of head, face, and neck
- C83.12 — Mantle cell lymphoma, intrathoracic lymph nodes
- C83.13 — Mantle cell lymphoma, intra-abdominal lymph nodes
- C83.14 — Mantle cell lymphoma, lymph nodes of axilla and upper limb
- C83.15 — Mantle cell lymphoma, lymph nodes of inguinal region and lower limb
- C83.16 — Mantle cell lymphoma, intrapelvic lymph nodes
- C83.17 — Mantle cell lymphoma, spleen
- C83.18 — Mantle cell lymphoma, lymph nodes of multiple sites
- C83.19 — Mantle cell lymphoma, extranodal and solid organ sites
- C83.1A — Mantle cell lymphoma, in remission
- C83.3 — Diffuse large B-cell lymphoma
- C83.30 — Diffuse large B-cell lymphoma, unspecified site
- C83.31 — Diffuse large B-cell lymphoma, lymph nodes of head, face, and neck
- C83.32 — Diffuse large B-cell lymphoma, intrathoracic lymph nodes
- C83.33 — Diffuse large B-cell lymphoma, intra-abdominal lymph nodes
- C83.34 — Diffuse large B-cell lymphoma, lymph nodes of axilla and upper limb
- C83.35 — Diffuse large B-cell lymphoma, lymph nodes of inguinal region and lower limb
- C83.36 — Diffuse large B-cell lymphoma, intrapelvic lymph nodes
- C83.37 — Diffuse large B-cell lymphoma, spleen
- C83.38 — Diffuse large B-cell lymphoma, lymph nodes of multiple sites
- C83.39 — Diffuse large B-cell lymphoma, extranodal and solid organ sites
- C83.390 — Primary central nervous system lymphoma
- C83.398 — Diffuse large B-cell lymphoma of other extranodal and solid organ sites
- C83.3A — Diffuse large B-cell lymphoma, in remission
- C83.5 — Lymphoblastic (diffuse) lymphoma
- C83.50 — Lymphoblastic (diffuse) lymphoma, unspecified site
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code C79.00
Secondary malignant neoplasm of unspecified kidney and renal pelvis
ICD Code C81.00
Nodular lymphocyte predominant Hodgkin lymphoma, unspecified site
ICD Code C86.00
Extranodal NK/T-cell lymphoma, nasal type not having achieved remission
ICD Code C88.00
Waldenström macroglobulinemia not having achieved remission