## **What is HCPCS code E1399?**
HCPCS code E1399 denotes miscellaneous durable medical equipment (DME), prosthetics, orthotics, and supplies (DMEPOS) —specifically, items that are not assigned to any existing HCPCS code.
It serves as a placeholder for miscellaneous accessories or equipment, particularly within categories such as oxygen delivery devices and external infusion pumps when a precise code is unavailable. Though often used for inexpensive DME, it also supports billing for unique, noncategorized items that don't fit standard classification.
## **HCPCS code E1399 documentation requirements**
Because E1399 is a “miscellaneous” code, comprehensive documentation is essential. Claims must include:
- A detailed written order from the physician, including the specific item, quantity, and diagnosis.
- A Letter of Medical Necessity (LMN) from the prescribing physician explaining why the standard, coded items are not suitable and why this specific, unlisted item is required for the patient's condition. The LMN should be clear, concise, and mention the patient's medical history.
- Description of the item, including manufacturer, model, product number, and intended use.
- DME supplier’s price list or invoice to validate cost.
- In repair contexts, include the HCPCS of the original equipment and the date of purchase.
- For repairs or replacements, support must include justification that servicing the beneficiary-owned DME is still reasonable and necessary, plus details on labor time and parts.
## **E1399 billing requirements**
Billing for E1399 is more complex than for a standard code. It often requires manual review and can be denied if the documentation is insufficient. Key guidelines include:
- Many payers require prior authorization for items billed with E1399. This is a crucial step to ensure the item will be covered before it is provided to the patient.
- Use E1399 only when no specific HCPCS code exists for the item being billed. Avoid it when a precise and appropriate code is available.
- The claim form must include a clear, concise description of the item in the narrative or "notes" field. Using generic terms like "miscellaneous" will lead to a denial. The description should match the item on the invoice and in the LMN.
- For equipment repairs, append modifier RB and include necessary narrative documentation: item description, reason, parts, and labor rationale.
- Reimbursement for E1399 is typically based on a percentage of the supplier's net cost (invoice cost). This means a detailed invoice is a must. Payers may also use a "comparable pricing" method, where they compare the item to a similar one with a specific code and reimburse accordingly.
## **Other relevant codes**
- **K0108**: Wheelchair component or accessory, not otherwise specified.
- **J7699 / J7799** – “Not otherwise classified” drug administration codes via DME (nebulizer or infusion pump) when billing a drug supply, not equipment.
Frequently asked questions
