D49.9

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

• •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

ICD-9-CM equivalent

Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.

• 2399

Associated MS-DRGs

D49.9 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 826Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCC
• DRG 827Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CC
• DRG 828Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures without CC/MCC
• DRG 829Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures with CC/MCC
• DRG 830Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures without CC/MCC
• DRG 843Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with MCC
• DRG 844Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with CC
• DRG 845Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses without CC/MCC