C84.00
Billable codeMycosis fungoides, unspecified site
The ICD-10 code for mycosis fungoides, unspecified site is C84.00.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- C84.01Mycosis fungoides, lymph nodes of head, face, and neck
- C84.02Mycosis fungoides, intrathoracic lymph nodes
- C84.03Mycosis fungoides, intra-abdominal lymph nodes
- C84.04Mycosis fungoides, lymph nodes of axilla and upper limb
- C84.05Mycosis fungoides, lymph nodes of inguinal region and lower limb
- C84.06Mycosis fungoides, intrapelvic lymph nodes
- C84.07Mycosis fungoides, spleen
- C84.08Mycosis fungoides, lymph nodes of multiple sites
- C84.09Mycosis fungoides, extranodal and solid organ sites
- C84.0AMycosis fungoides, in remission
- C84.00Mycosis fungoides, unspecified site
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 20210Approximate match
Associated MS-DRGs
C84.00 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.
- DRG 814Reticuloendothelial and Immunity Disorders with MCC
- DRG 815Reticuloendothelial and Immunity Disorders with CC
- DRG 816Reticuloendothelial and Immunity Disorders without CC/MCC
- DRG 820Lymphoma and Leukemia with Major O.R. Procedures with MCC
- DRG 821Lymphoma and Leukemia with Major O.R. Procedures with CC
- DRG 822Lymphoma and Leukemia with Major O.R. Procedures without CC/MCC
- DRG 823Lymphoma and Non-Acute Leukemia with Other Procedures with MCC
- DRG 824Lymphoma and Non-Acute Leukemia with Other Procedures with CC
- DRG 825Lymphoma and Non-Acute Leukemia with Other Procedures without CC/MCC
- DRG 840Lymphoma and Non-Acute Leukemia with MCC
- DRG 841Lymphoma and Non-Acute Leukemia with CC
- DRG 842Lymphoma and Non-Acute Leukemia without CC/MCC