D37.3 is the authoritative medical code for Neoplasm of uncertain behavior of appendix. This classification is used in medical billing and clinical recording to specify the clinical criteria for neoplasm of uncertain behavior of appendix (ICD-10-CM D37.3), 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
Neoplasm of uncertain behavior of appendix is a billable ICD-10-CM diagnosis code D37.3. Excludes1 (not coded here): stromal tumors of uncertain behavior of digestive system D48.1-; neoplasms of unspecified behavior D49.-.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for D37.3 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.
- stromal tumors of uncertain behavior of digestive system D48.1-
- neoplasms of unspecified behavior D49.-
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with D37.3?
Per Excludes1 instructions, D37.3 must not be reported with: stromal tumors of uncertain behavior of digestive system (D48.1-); neoplasms of unspecified behavior (D49.-).
Codes in This Family (13)
Official ICD-10-CM classifications in the same code family as D37.3, with their registry titles.
- D37 — Neoplasm of uncertain behavior of oral cavity and digestive organs
- D37.0 — Neoplasm of uncertain behavior of lip, oral cavity and pharynx
- D37.030 — Neoplasm of uncertain behavior of the parotid salivary glands
- D37.031 — Neoplasm of uncertain behavior of the sublingual salivary glands
- D37.032 — Neoplasm of uncertain behavior of the submandibular salivary glands
- D37.039 — Neoplasm of uncertain behavior of the major salivary glands, unspecified
- D37.1 — Neoplasm of uncertain behavior of stomach
- D37.2 — Neoplasm of uncertain behavior of small intestine
- D37.4 — Neoplasm of uncertain behavior of colon
- D37.5 — Neoplasm of uncertain behavior of rectum
- D37.6 — Neoplasm of uncertain behavior of liver, gallbladder and bile ducts
- D37.8 — Neoplasm of uncertain behavior of other specified digestive organs
- D37.9 — Neoplasm of uncertain behavior of digestive organ, unspecified
Neoplasm Table Sites (2)
Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.
- Neoplasm, neoplastic, appendix — Uncertain Behavior
- Neoplasm, neoplastic, intestine, intestinal, large, appendix — Uncertain Behavior
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: