E16.4 ICD-10-CA code: Abnormal secretion of gastrin
E16.4 is the ICD-10-CA code for “Abnormal secretion of gastrin” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
E16.4Abnormal secretion of gastrin
ICD-10-CA · Canada · Also written E164
Index terms
Entries in CIHI’s alphabetical index that lead to E16.4. Searching the index by the condition the note names is how coders reach this code.
- Hypergastrinemia
- Hypersecretion, gastrin
- Ellison Zollinger syndrome
- Zollinger Ellison syndrome
- Increase, increased, secretion, gastrin
- Abnormal, abnormality, abnormalities, secretion, gastrin
- Hyperplasia, hyperplastic, pancreatic islet cells, alpha, with excess, gastrin
Notes for E16.4
As CIHI prints them, with any note E16.4 takes from the headings above it.
Includes
- HypergastrinaemiaZollinger Ellison syndrome
Excludes
Conditions classified elsewhere.
- Complications of pregnancy, childbirth and the puerperium (O00-O99)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)transitory endocrine and metabolic disorders specific to fetus and newborn (P70-P74)From Chapter 4: Endocrine, nutritional and metabolic diseases (E00-E90)
Note
- All neoplasms, whether functionally active or not, are classified in Chapter II. Appropriate codes in this chapter (i.e. E05.8)(E07.0) (E16-E31)(E34.-) may be used, if desired, as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.From Chapter 4: Endocrine, nutritional and metabolic diseases (E00-E90)
Where E16.4 sits
- 1ChapterChapter 4: Endocrine, nutritional and metabolic diseases (E00-E90)
- 2Block E15-E16Other disorders of glucose regulation and pancreatic internal secretion
- 3Category E16Other disorders of pancreatic internal secretion
- 4Valid code E16.4Abnormal secretion of gastrin
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code E16.4 mean?
E16.4 is the ICD-10-CA code for “Abnormal secretion of gastrin” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is E16.4 in ICD-10-CA?
E16.4 sits under E16 Other disorders of pancreatic internal secretion, within E15-E16 Other disorders of glucose regulation and pancreatic internal secretion, within Chapter 4: Endocrine, nutritional and metabolic diseases (E00-E90).
What coding notes apply to E16.4?
ICD-10-CA lists Includes, Note, Excludes notes for E16.4, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.