N-648 naturalization waiver: medical disability 2026

The naturalization test requires showing basic English (read, write, speak) and civics knowledge (from a pool of 100). For residents with a serious medical disability that prevents learning or showing that knowledge, USCIS allows an exemption with Form N-648. It is a delicate filing: a poorly prepared N-648 can sink the entire N-400.

What N-648 is

The N-648 (Medical Certification for Disability Exceptions) is a medical certificate filed with the N-400. If USCIS approves, it waives the English requirement, the civics requirement, or both, for the naturalization test.

It does not waive other requirements: continuous residence, physical presence, good moral character, oath of allegiance.

Who qualifies

Anyone with a physical or developmental disability, or mental impairment, that causes the inability to learn or show the required knowledge. Common examples:

Alzheimer's and advanced dementia.
Severe intellectual disability.
Severe PTSD with documented cognitive impact.
Traumatic brain injury with cognitive sequelae.
ALS, advanced MS with cognitive impact.
Profound deafness combined with no prior education.
Severe schizophrenia, severe major depression with cognitive disability.

Not by themselves:

Advanced age.
Low education.
Difficulty learning a second language without medical condition.
Test anxiety.

The condition must have lasted or be expected to last 12+ months.

Who can sign

Only licensed diagnosticians:

Medical doctor (MD) or osteopath (DO).
Licensed clinical psychologist (PhD or PsyD).

Cannot sign: nurses, therapists, social workers, naturopaths, chiropractors, PAs. The signer must be the diagnoser/treater.

The doctor need not be an immigrant or speak Spanish — must have an active license in the practice state.

What the current edition requires

Since the 2022 update (still in force in 2026), N-648 simplified many fields but raised the evidence bar. The doctor must:

Identify the diagnosis with ICD-10 code.
Describe how the condition prevents learning or showing English/civics — listing the diagnosis is not enough.
Connect cause to effect — the nexus many forms fail at.
Indicate how long the patient has had the condition and expected duration.
Confirm the disability is not due to illegal drug or alcohol use.
Sign and date within the 6 months before the N-400 filing.

Step by step

Find an authorized doctor who knows the condition and has treated or evaluated the applicant.
Schedule a visit: the doctor must examine, not sign blindly.
Bring prior medical records so the doctor can ground the diagnosis.
Doctor completes the N-648: ideally with detailed narrative.
Review before signing: common errors — old date, missing nexus, wrong box.
File N-648 with the N-400: it must be requested at filing, not later.
At the interview, the officer reviews the N-648 with the applicant present. May ask basic questions.
If approved, the English/civics test is waived. If denied, the applicant must take the regular test.

Documents needed

N-648 fully completed, signed by authorized doctor and by applicant.
Medical records supporting the diagnosis (not filed with N-648, but ready if USCIS requests more).
For guardianship: legal guardianship documents.
Optional additional evaluation letter for complex cases.

Timing and fees 2026

Cost: $0 — N-648 has no fee. The N-400 fee is $760 paper / $710 online (plus biometrics if applicable).
Timing: resolved with the N-400, typically 8-14 months.
Doctor charges separately for the visit and form — varies widely ($200-$1,000+). USCIS does not reimburse.

Common mistakes leading to denial

Unauthorized signer.
Diagnosis without nexus: "has Alzheimer's" without explaining how it prevents learning.
N-648 dated more than 6 months before N-400.
Inconsistent boxes: asking English-only waiver but description applies to civics too.
Substance-use-based diagnosis: automatic denial.
No narrative: just codes without explanation.
Applicant skips the interview: waiver requires presence (with guardianship exceptions).
No mention of treatments: form asks what has been tried.

Need help?

The N-648 is one of the most denied USCIS forms. Good preparation with a doctor who understands the requirements can save the case. If your family member has a qualifying condition, schedule a consultation — ideally before the doctor visit.

FAQ

Can my regular doctor sign? Yes, if MD or DO with active license. Important is they know your condition and treat or have evaluated you.

If N-648 is denied, is N-400 denied? Not automatically. Applicant takes the regular test. If passed, naturalizes. If not, N-400 may be denied.

Can I file a corrected N-648 later? Yes, if the interview has not happened or USCIS gives the chance. After denial, you file a new N-400.

Can my child with intellectual disability naturalize? Yes, with N-648. Severe cases may need a legal guardian to take the oath and represent.

Does age alone waive the test? No, but there is a civics exception for older applicants: 65+ with 20+ years of residency may take the 20-question version in their language. Different rule from N-648.

If I waive English only, do I take civics in Spanish? Yes, if English is waived, civics is taken in your language of choice.

Can USCIS demand a second medical opinion? Yes. It can issue an RFE or refer to its own examiner.

N-648 naturalization waiver: medical disability for the English and civics test