Is this letter of medical necessity generator free?
Yes. Create letters without an account 3 times a day, or 5 times a day with a free account. Pro removes the daily limit.
Business Tools
Letter of Medical Necessity
Write insurance, appeal and HSA/FSA medical necessity letters.
Written in your browser: patient details are never uploadedFree: 3 uses a day, 5 with a free account. Unlimited on Pro
1Type of letter
2Provider and practice
Remembered in this browser. Sign in to keep it in your account instead.
Logo (optional)
Signature
3Send to
The insurance company, usually its utilization review, prior authorization or appeals department.
4Patient
Never saved or uploaded.
Diagnosis codes
5The request
Short, specific answers work best. The letter below is written from them.
6Letter
Edit the wording freely. It is your letter.
Updates as you fill in the answers above.
Check before you send (8)
- Add the provider name in the practice section.
- Add the provider NPI. Insurers expect it on the letter.
- Add the patient name and date of birth.
- Add the member ID so the insurer can match the letter to the patient.
- Describe the treatment, item or service you are requesting.
- Add at least one diagnosis code.
- Explain why it is medically necessary. This is the part reviewers read most closely.
- Add a signature. Unsigned letters are often rejected.
How it works
1
Choose the letter
Insurance coverage or prior authorization, an appeal of a denied claim, or HSA and FSA reimbursement.
2
Answer a few questions
Diagnosis codes, the treatment, what was tried before, and why it is needed. The letter writes itself as you type.
3
Edit and download
Change any wording, then download it on your letterhead with your signature, NPI and license.
What a letter of medical necessity should include
- Patient: name, date of birth, and for insurance letters the member ID and group number.
- Diagnosis: the condition and ICD-10-CM codes.
- The request: the treatment, item or service, with CPT or HCPCS codes, how often and for how long.
- Clinical reasons: history and symptoms, treatments already tried and how they worked, and why this treatment is needed now.
- Expected outcome: what the treatment should achieve, and what is likely without it.
- Provider: name, credentials, NPI, license, contact details and signature.
Letters of medical necessity for HSA and FSA
Some expenses only qualify for HSA, FSA or HRA funds when they treat a specific medical condition, for example massage therapy, certain supplements, a weight loss program for a diagnosed condition, or special equipment. Administrators usually ask for a letter from the provider that names the condition, the treatment, and how long it is needed. Many ask for a new letter each plan year.
Writing an appeal for a denied claim
Include the claim or reference number and the reason given for the denial, then answer that reason directly with clinical facts. Attach supporting records, keep a copy of everything you send, and send it before the plan appeal deadline in the denial letter.
Letter of Medical Necessity features
- Three letter types: insurance coverage or prior authorization, appeal of a denied claim, and HSA, FSA or HRA reimbursement.
- Diagnosis codes from the full 2027 ICD-10-CM list, with the descriptions written into the letter.
- Covers what reviewers look for: history, treatments already tried, why it is necessary, expected outcome and risks without it.
- The letter updates as you answer, and you can edit every word before downloading.
- Letterhead with your logo, signature, NPI and license, and saved recipients for the payers you write to often.
- Your practice is saved to your account and shared with the other Craftora medical tools. Patient details are never uploaded.
Letter of Medical Necessity FAQ
Who signs a letter of medical necessity?
The treating provider, such as the physician, therapist or other licensed clinician who recommends the treatment.
Can I change the wording?
Yes. The letter is written from your answers, and you can edit any part of it before downloading.
Is patient information uploaded?
No. The letter is written in your browser. Only your practice details and saved recipients are stored, and only if you save them to your account.
How long is a letter of medical necessity valid?
It depends on the insurer or administrator. Many HSA and FSA administrators ask for a new letter each plan year.
Related Business Tools
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