Non-Billable / Non-Specific Code
ICD-10-CM Q85 is the diagnosis code for Phakomatoses, not elsewhere classified. This code falls under the section "Other congenital malformations" within Chapter 17 — Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0). 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.
The following conditions should never be coded at the same time as Q85. They are mutually exclusive:
Understanding where Q85 sits in the ICD-10-CM classification helps ensure proper coding:
No, Q85 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
Q85 is the ICD-10-CM diagnosis code for "Phakomatoses, not elsewhere classified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
Q85 is located in Section Q80-Q89 — "Other congenital malformations" within Chapter 17 of the ICD-10-CM Tabular List.
Q85 has 4 sub-code(s) that provide more specific detail: Q85.0, Q85.1, Q85.8, Q85.9.
Use Q85 when the patients documented diagnosis matches "Phakomatoses, not elsewhere classified" 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 Phakomatoses, not elsewhere classified is Q85.
No, Q85 is non-billable. Use a more specific sub-code for primary diagnosis billing.
Q85 is in Chapter 17 of the ICD-10-CM Tabular List.
Type 1 Excludes for Q85 include: ataxia telangiectasia [Louis-Bar] (G11.3); familial dysautonomia [Riley-Day] (G90.1).
Yes, Q85 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.