Non-Billable / Non-Specific Code
ICD-10-CM N27 is the diagnosis code for Small kidney of unknown cause. This code falls under the section "Other disorders of kidney and ureter" within Chapter 14 — Diseases of the genitourinary system (N00-N99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where N27 sits in the ICD-10-CM classification helps ensure proper coding:
No, N27 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
N27 is the ICD-10-CM diagnosis code for "Small kidney of unknown cause". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
N27 is located in Section N25-N29 — "Other disorders of kidney and ureter" within Chapter 14 of the ICD-10-CM Tabular List.
N27 has 3 sub-code(s) that provide more specific detail: N27.0, N27.1, N27.9.
Use N27 when the patients documented diagnosis matches "Small kidney of unknown cause" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Small kidney of unknown cause is N27.
No, N27 is non-billable. Use a more specific sub-code for primary diagnosis billing.
N27 is in Chapter 14 of the ICD-10-CM Tabular List.
Yes, N27 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.