Non-Billable / Non-Specific Code
ICD-10-CM Q85.8 is the diagnosis code for Other 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 Q85.8. They are mutually exclusive:
Understanding where Q85.8 sits in the ICD-10-CM classification helps ensure proper coding:
No, Q85.8 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
Q85.8 is the ICD-10-CM diagnosis code for "Other phakomatoses, not elsewhere classified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of Q85.8 is Q85 ("Phakomatoses, not elsewhere classified"). Q85.8 provides a more specific classification within this category.
Q85.8 is located in Section Q80-Q89 — "Other congenital malformations" within Chapter 17 of the ICD-10-CM Tabular List.
Q85.8 has 1918 sub-code(s) that provide more specific detail: A00, A01, A02, A03, A04 and more.
Use Q85.8 when the patients documented diagnosis matches "Other 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 Other phakomatoses, not elsewhere classified is Q85.8.
No, Q85.8 is non-billable. Use a more specific sub-code for primary diagnosis billing.
Q85.8 is in Chapter 17 of the ICD-10-CM Tabular List.
Type 1 Excludes for Q85.8 include: Meckel-Gruber syndrome (Q61.9).
Yes, Q85.8 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.