ICD10BillableValid for clinical use
ICD-10 Code D37.9: Neoplasm of uncertain behavior of digestive organ, unspecified
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Neoplasms (C00-D49).
When is it used?
- May be used when a clinician documents neoplasm of uncertain behavior of digestive organ, unspecified in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
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.
Code hierarchy
chapter
2Neoplasms (C00-D49)
block
D37-D48Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
category
D37Neoplasm of uncertain behavior of oral cavity and digestive organs
currentD37
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
OncologistGeneral PhysicianGastroenterologist
Related codes
D37.0Neoplasm of uncertain behavior of lip, oral cavity and pharynxcategoryD37.1Neoplasm of uncertain behavior of stomachcodeD37.2Neoplasm of uncertain behavior of small intestinecodeD37.3Neoplasm of uncertain behavior of appendixcodeD37.4Neoplasm of uncertain behavior of coloncodeD37.5Neoplasm of uncertain behavior of rectumcodeD37.6Neoplasm of uncertain behavior of liver, gallbladder and bile ductscodeD37.8Neoplasm of uncertain behavior of other specified digestive organscode
Sibling codes
D37.0Neoplasm of uncertain behavior of lip, oral cavity and pharynxD37.1Neoplasm of uncertain behavior of stomachbillableD37.2Neoplasm of uncertain behavior of small intestinebillableD37.3Neoplasm of uncertain behavior of appendixbillableD37.4Neoplasm of uncertain behavior of colonbillableD37.5Neoplasm of uncertain behavior of rectumbillableD37.6Neoplasm of uncertain behavior of liver, gallbladder and bile ductsbillableD37.8Neoplasm of uncertain behavior of other specified digestive organsbillable
Coverage-related procedures and services
CPT 81540high
ONCOLOGY (TUMOR OF UNKNOWN ORIGIN), MRNA, GENE EXPRESSION PROFILING BY REAL-TIME RT-PCR OF 92 GENES (87 CONTENT AND 5 HOUSEKEEPING) TO CLASSIFY TUMOR INTO MAIN CANCER TYPE AND SUBTYPE, UTILIZING FORMALIN-FIXED PARAFFIN-EMBEDDED TISSUE, ALGORITHM REPORTED AS A PROBABILITY OF A PREDICTED MAIN CANCER TYPE AND SUBTYPE
Source: CMS coverage guidance
CPT 88182high
FLOW CYTOMETRY, CELL CYCLE OR DNA ANALYSIS
Source: CMS coverage guidance
CPT 88185high
FLOW CYTOMETRY, CELL SURFACE, CYTOPLASMIC, OR NUCLEAR MARKER, TECHNICAL COMPONENT ONLY; EACH ADDITIONAL MARKER (LIST SEPARATELY IN ADDITION TO CODE FOR FIRST MARKER)
Source: CMS coverage guidance
CPT 88184high
FLOW CYTOMETRY, CELL SURFACE, CYTOPLASMIC, OR NUCLEAR MARKER, TECHNICAL COMPONENT ONLY; FIRST MARKER
Source: CMS coverage guidance
CPT 88189high
FLOW CYTOMETRY, INTERPRETATION; 16 OR MORE MARKERS
Source: CMS coverage guidance
CPT 88187high
FLOW CYTOMETRY, INTERPRETATION; 2 TO 8 MARKERS
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 254574000high
Diffuse leiomyomatosis of esophagus
Source: SNOMED International ICD-10 map
SNOMED_CT 302824004high
Gastrinoma
Source: SNOMED International ICD-10 map
SNOMED_CT 314601002high
Gastrointestinal anastomotic tumor recurrence
Source: SNOMED International ICD-10 map
SNOMED_CT 237832001high
Gastrointestinal hormone-secreting endocrine tumor
Source: SNOMED International ICD-10 map
SNOMED_CT 420120006high
Gastrointestinal stromal tumor
Source: SNOMED International ICD-10 map
SNOMED_CT 254532005high
Neoplasm of digestive organ
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
D37.9
Common synonyms
Neoplasm of uncertain behavior of digestive organ, unspecifiedNeoplasm of uncertain behavior of digestive organ
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.