Writing a Letter of Medical Necessity for Nursing & Home Health Services - A Guide for Pediatric Healthcare Providers

Sep 16, 2026

A practical guide for pediatric healthcare providers on composing a strong letter of medical necessity for nursing and home health aide services. It walks through requesting specific shifts and durations, listing diagnoses, and articulating medical necessity using definition-based language, including how services prevent illness, reduce harmful effects, or support maximum functional capacity. It also addresses coordination for children with co-occurring physical and behavioral health needs, parental availability criteria under Medicaid, and documentation of clinical changes since prior authorization.

LanguageEnglish

CategoryLetters

FormatPDF

Pages4

Reading Time2 min

AccessFree to download

Writing a Letter of Medical Necessity for Nursing & Home Health Services

Step 1: State the Requested Services

Step 2: Use the Definition of Medical Necessity

Children with Behavioral Health Needs

Step 3: Address Parental Availability

Step 5: Document Changes Since Last Authorization

Writing a Letter of Medical Necessity for Nursing & Home Health Services: A Guide for Pediatric Healthcare Providers This guide explains how to write a strong letter of medical necessity to ensure your patient receives the shift care services they need. Step 1 : State the Requested Services Say who you are (primary care physician, specialist), how long you have known and treated the patient, and the service which you are requesting. For shift care services like Skilled Nursing or Home Health Aide services, be as specific as possible regarding the number of hours requested per day, the usage of these hours (e.g. , for work; school; sleep; parental duties), and the duration of the prescription (e.g. 6 months) . Next, state the patient’s diagnoses. Step 2 : Use the Definition of Medical Necessity Using the language of the medical necessity definition outlined in the box below, state why the service is medically necessary. Example: “Jane Doe needs home health care services because I expect it to assist her in achieving maximum functional capacity in performing activities of daily living, such as bathing, eating, dressing, and personal hygiene.” Legal Definition of Medical Necessity Under Pennsylvania Medicaid law, services are medically necessary if the service meets any one of the following: 1. It will, or is reasonably expected to, prevent the onset of an illness, condition, or disability; 2. It will, or is reasonably expected to, reduce or ameliorate the physical, mental, or developmental effects of an illness, condition or disability; or 3. It will, or is reasonably expected to, assist the individual to achieve or maintain maximum functional capacity in performing daily activities taking into account both the functional capacity of the individual and those functional capacities that are appropriate for individuals of the same age. Use as many parts of the medical necessity definition that are relevant to your patient as possible. Explain the specific medical problem or functional limitation that results from the patient’s diagnosis, and how the requested service will address that. In as much detail as possible, your letter should: • Explain how the service will prevent an illness or disability. Refer to medical articles or lectures. Review failed treatments. Consider information available to you about the patient, such as compliance with other regimens, family and home supports, or coping skills, which the insurer may not know. Be specific about goals. • Explain how the service will ameliorate the physical, mental, or developmental effects of the patient’s illness. Cite past successes with the treatment. Cite recent medical articles. Include letters from consultants. Review failed treatments and address the insurer’s suggested treatments. Be specific about psychological factors that are relevant to your chosen treatment. Provide information you have which a distant administrator may not know. Children with Behavioral Health Needs While Medicaid Physical Health plans are not responsible for behavioral health care needs, they are still required to assist in the coordination to meet the member’s needs. When reviewing a request for nursing or home health aide services for a child with co-occurring physical and behavioral health needs, the health plan must take all aspects into consideration, including whether the child has physical implications or manifestations stemming from their behavioral health diagnosis. Also, cuing and monitoring can still be medically necessary reasons for nursing or home health aide level of care. Hands-on care is not always required in order to be medically necessary. • Explain how the service will assist the patient to maintain functional capacity. Include letters from physical or occupational therapists. Cite conversations with family members or other treating physicians. Include journal references on unusual or new treatment modalities. • Review any previous ser

FAQs

What should be included when stating the requested nursing or home health aide services?

Include who you are, how long you have known and treated the patient, the specific service requested, and the number of hours per day, how those hours will be used, and the duration of the prescription. Also list the patient’s diagnoses.

How should medical necessity be described in the letter?

Use the language of the medical necessity definition and explain why the requested service is medically necessary for the patient. Cover how it will prevent illness or disability, ameliorate effects of the diagnosis, and/or help maintain maximum functional capacity.

What factors must be addressed about parental availability for Medicaid approval?

Even when clinically appropriate, services may not be approved if parents are able and available to meet the child’s needs during the requested times. Document factors such as parents’ work schedules and commute, parents’ health limitations, essential household duties, religious or errand commitments, and care needs for other children.

Sep 16, 2026

Upload by Ethan Miller