Short answer · Medically reviewed summary · Last updated: 2026-05-08
A pituitary tumour is typically classified under the ICD-10 code D35.2 (benign neoplasm of the pituitary gland) or C75.1 (malignant neoplasm of the pituitary gland). In the older ICD-9 coding system, benign pituitary tumours were most commonly coded as 227.3, while malignant forms were coded as 194.3. What is the clinical classification of a pituitary tumour? While coding systems provide a standard for billing, a pituitary tumour is clinically categorized based on its size and hormonal activity.
ICD10 code of Pituitary tumour and ICD9 code
ICD-10 and ICD-9 codes for Pituitary tumour, with classification details for clinicians, coders and patients.
A pituitary tumour is typically classified under the ICD-10 code D35.2 (benign neoplasm of the pituitary gland) or C75.1 (malignant neoplasm of the pituitary gland). In the older ICD-9 coding system, benign pituitary tumours were most commonly coded as 227.3, while malignant forms were coded as 194.3.
What is the clinical classification of a pituitary tumour?
While coding systems provide a standard for billing, a pituitary tumour is clinically categorized based on its size and hormonal activity. Most pituitary tumours are adenomas, which are generally slow-growing and non-cancerous. However, their location near the optic chiasm and critical hormone-producing centers means even a small pituitary tumour can cause significant systemic health issues by disrupting the endocrine system or compressing surrounding structures.
How are pituitary tumours categorized for medical records?
Medical professionals and billing departments use specific codes to track the diagnosis of a pituitary tumour. When reviewing your medical records, you may encounter the following classifications:
- ICD-10 D35.2: Benign neoplasm of the pituitary gland (the most common designation).
- ICD-10 C75.1: Malignant neoplasm of the pituitary gland (rare).
- ICD-9 227.3: Benign neoplasm of the pituitary gland and craniopharyngeal duct.
- ICD-9 194.3: Malignant neoplasm of the pituitary gland and craniopharyngeal duct.
Why is accurate diagnosis of a pituitary tumour important?
Because a pituitary tumour can manifest as either hyper-secreting (producing excess hormones like prolactin, growth hormone, or ACTH) or non-functioning, accurate diagnostic coding is essential for determining the appropriate treatment path. With 97 members on DiseaseMaps.org currently managing a pituitary tumour, our community data highlights that early identification of hormonal imbalances is often as critical as identifying the mass itself through MRI imaging.
Next steps
- Consult an endocrinologist to assess hormone levels and a neurosurgeon to evaluate the mass.
- Request a copy of your pathology or radiology report to ensure your ICD codes match your specific clinical presentation.
- Connect with the 97 members on DiseaseMaps.org who are navigating a pituitary tumour diagnosis to share experiences and coping strategies.
Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.
References
- World Health Organization (WHO), International Classification of Diseases (ICD-10/ICD-11).
- NIH Genetic and Rare Diseases Information Center (GARD) - Pituitary Adenoma.
- Orphanet: Portal for rare diseases and orphan drugs.
- Pituitary Society: Patient resources and clinical guidelines.
