Form N-648 Disability Exception Guide
Written and reviewed by the N400Test.com team against official USCIS sources · Last reviewed September 3, 2026 · Educational information, not legal advice.
Learn what Form N-648 is and how it relates to disability exceptions for naturalization testing. This guide explains the issue in plain language and points you back to official USCIS materials for current rules.
What Form N-648 Is
Form N-648 is a medical certification used to request an exception from English, civics, or both. The disability or impairment must be medically determinable, have lasted or be expected to last at least 12 months, and make the applicant unable to meet the relevant requirement even with reasonable accommodations.
What It May Affect
USCIS decides whether the certification is sufficient and whether it supports an exception from English, civics, or both. Form N-648 does not waive every naturalization requirement or the entire interview.
How It Differs From Age-Based Exceptions
Age-based English exceptions use age and qualifying years living in the United States as an LPR. Form N-648 instead requires an individualized connection between a qualifying disability or impairment and inability to meet English, civics, or both. Illiteracy and advanced age alone are not qualifying medical reasons.
Who May Certify and How
Only a medical doctor, doctor of osteopathy, or clinical psychologist licensed to practice in the United States or specified U.S. territories may certify Form N-648. The evaluation may be in person or, where state law permits, through a real-time telehealth examination.
Current Edition, Fee, and Filing Timing
As reviewed September 3, 2026, the current form edition is 09/25/24 and USCIS charges no filing fee for Form N-648, although a medical professional may charge for the examination and form. The current Policy Manual instructs applicants to submit the initial N-648 with Form N-400. A first submission after filing is late and may be accepted when extenuating circumstances are shown.
Exception vs Accommodation
An accommodation changes how an applicant accesses or completes the process, such as additional time or a sign-language interpreter. It does not waive a requirement. Form N-648 requests an exception when the applicant cannot meet the relevant testing requirement even with reasonable accommodations.
Frequently Asked Questions
Does Form N-648 waive the whole naturalization interview? No. Form N-648 relates to disability exceptions for testing requirements, not every part of naturalization eligibility.
Who completes Form N-648? Only a U.S.-licensed medical doctor, doctor of osteopathy, or clinical psychologist may certify Form N-648. USCIS decides whether the completed certification is sufficient.
Does USCIS charge a Form N-648 filing fee? No. USCIS does not charge a filing fee for Form N-648, but the medical professional may charge for the examination and for completing the form.
Official USCIS Sources
- USCIS Form N-648, Medical Certification for Disability Exceptions
- USCIS Policy Manual, Medical Certification for Disability Exception
- USCIS Naturalization Interview and Test
This article is for educational purposes and is based on USCIS materials available when last reviewed. Always check USCIS.gov for the current version of forms, fees, and policy.