KF Modifier Use - Correct Coding - Revised - JA DME
KF Modifier Use - Correct Coding - Revised
Joint DME MAC Publication
Posted May 14, 2026
Suppliers are reminded that when they append the KF modifier (ITEM DESIGNATED BY FDA AS CLASS III DEVICE) to a claim line, they are attesting that the claim line includes a device classified by the Food and Drug Administration (FDA) as "Class III."
Classification of a device as "Class III" is specific to the device. It is not specific to the HCPCS code that describes the device; therefore, you should verify that the specific device being billed is Class III before appending the KF modifier to the HCPCS code on your claim.
If the device is Class III, then you must append the KF modifier. If the device is not Class III, then you must not append the KF modifier. A claim submitted with the KF modifier for a device that is not Class III is subject to overpayment.
The table below provides examples of HCPCS codes that can describe Class III devices. The table identifies local coverage determination (LCD) related Policy Articles or other articles that contain coding information, including KF modifier information. If, upon review of the LCD-related Policy Article(s) or other article(s), you are uncertain whether the specific device being billed is Class III, then you should confirm the device classification with the FDA or manufacturer.
The table also identifies LCDs that contain reasonable and necessary information relevant to the devices described by these HCPCS codes. If an active LCD does not exist, then the table identifies an applicable national coverage determination (NCD).
Note: If there is not a unique HCPCS code that describes the Class III device, then use the miscellaneous HCPCS code E1399 (DURABLE MEDICAL EQUIPMENT, MISCELLANEOUS) to represent the device and append the KF modifier.
| HCPCS Code | Descriptor | LCD or NCD, LCD-related Policy Article or other Article |
|---|---|---|
| A4238 | SUPPLY ALLOWANCE FOR ADJUNCTIVE, NON-IMPLANTED CONTINUOUS GLUCOSE MONITOR (CGM), INCLUDES ALL SUPPLIES AND ACCESSORIES, 1 MONTH SUPPLY = 1 UNIT OF SERVICE | Glucose Monitors LCD (L33822) and LCD-related Policy Article (A52464) |
| A4239 | SUPPLY ALLOWANCE FOR NON-ADJUNCTIVE, NON-IMPLANTED CONTINUOUS GLUCOSE MONITOR (CGM), INCLUDES ALL SUPPLIES AND ACCESSORIES, 1 MONTH SUPPLY = 1 UNIT OF SERVICE | Glucose Monitors LCD (L33822) and LCD-related Policy Article (A52464) |
| E0617 | EXTERNAL DEFIBRILLATOR WITH INTEGRATED ELECTROCARDIOGRAM ANALYSIS | Automatic External Defibrillators LCD (L33690) and LCD-related Policy Article (A52458) |
| E0764 | FUNCTIONAL NEUROMUSCULAR STIMULATION, TRANSCUTANEOUS STIMULATION OF SEQUENTIAL MUSCLE GROUPS OF AMBULATION WITH COMPUTER CONTROL, USED FOR WALKING BY SPINAL CORD INJURED, ENTIRE SYSTEM, AFTER COMPLETION OF TRAINING PROGRAM | Neuromuscular Electrical Stimulator (NMES) NCD (160.12) and article titled "Functional Electrical Stimulation (FES) - Coverage and HCPCS Coding" |
| E0766 | ELECTRICAL STIMULATION DEVICE USED FOR CANCER TREATMENT, INCLUDES ALL ACCESSORIES, ANY TYPE | Tumor Treatment Field Therapy (TTFT) LCD (L34823) and LCD-related Policy Article (A52711) |
| E2102 | ADJUNCTIVE, NON-IMPLANTED CONTINUOUS GLUCOSE MONITOR OR RECEIVER | Glucose Monitors LCD (L33822) and LCD-related Policy Article (A52464) |
| E2103 | NON-ADJUNCTIVE, NON-IMPLANTED CONTINUOUS GLUCOSE MONITOR OR RECEIVER | Glucose Monitors LCD (L33822) and LCD-related Policy Article (A52464) |
| K0606 | AUTOMATIC EXTERNAL DEFIBRILLATOR, WITH INTEGRATED ELECTROCARDIOGRAM ANALYSIS, GARMENT TYPE | Automatic External Defibrillators LCD (L33690) and LCD-related Policy Article (A52458) |
| K0607 | REPLACEMENT BATTERY FOR AUTOMATED EXTERNAL DEFIBRILLATOR, GARMENT TYPE ONLY, EACH | Automatic External Defibrillators LCD (L33690) and LCD-related Policy Article (A52458) |
| K0608 | REPLACEMENT GARMENT FOR USE WITH AUTOMATED EXTERNAL DEFIBRILLATOR, EACH | Automatic External Defibrillators LCD (L33690) and LCD-related Policy Article (A52458) |
| K0609 | REPLACEMENT ELECTRODES FOR USE WITH AUTOMATED EXTERNAL DEFIBRILLATOR, GARMENT TYPE ONLY, EACH | Automatic External Defibrillators LCD (L33690) and LCD-related Policy Article (A52458) |
Please see the applicable LCD-related Policy Articles or other article(s) (as noted in the table above) for specific information. LCD-related Policy Articles are published on the Medicare Coverage Database (MCD) and are accessible through the Durable Medical Equipment Medicare Administrative Contractor (DME MAC) websites. The other article(s) (noted in the table above) is accessible on the DME MAC websites.
Publication History
| Date of Change | Description |
|---|---|
| May 14, 2026 | Revised to (1) clarify that classification of a device as Class III is specific to the device and is not specific to the HCPCS code that describes the device; (2) clarify that a claim submitted with the KF modifier for a device that is not Class III is subject to overpayment; (3) clarify that if, upon review of the LCD-related Policy Article(s) or other article(s), the supplier is uncertain whether the device is Class III, then to confirm classification of the device with the FDA or manufacturer; (4) remove osteogenesis stimulators (E0747, E0748, and E0760) from the table due to the FDA's reclassification of the devices from Class III to Class II (effective for dates of service on or after May 18, 2026); and, (5) clarify information in the table by adding references to LCD-related Policy Articles and other article(s), by removing K0553 and K0554, and by adding E2102, E2103, A4238, and A4239 |
| August 29, 2019 | Originally Published |
