No, you don’t need to submit everything at once! You can submit for reimbursement however it works best for you: monthly, every few months, once or twice a year, or all at once, as long as your HSA/FSA account remains open.
If you already have a SNOO Letter of Medical Necessity (LMN), you can use that same LMN for your App subscription reimbursements—there’s no need to apply for a separate one.
If you already have an LMN:
Your LMN is valid for one year from the date it was issued. Simply submit your App subscription receipts to your HSA/FSA provider at whatever cadence you prefer during that validity period.
Example: An LMN issued on 2/1/2026 would be valid through 1/31/2027. Any subscription payments that fall within that window are eligible for reimbursement, as long as your HSA/FSA account remains open.
If you don’t have an LMN yet:
You can apply directly within the Happiest Baby App. For best alignment:
If you’re already subscribed, complete your LMN application within 24 hours of your next billing date.
If you’re not yet subscribed, apply for your LMN and activate your subscription within 24 hours.
Disclaimer: The information on our site is NOT medical advice for any specific person or condition. It is only meant as general information. If you have any medical questions and concerns about your child or yourself, please contact your health provider.