Let’s begin with the anatomy. The plantar fascia is a thick band of tissue that runs along the bottom of the foot and supports the arch. Plantar fasciitis occurs when this tissue becomes irritated or degenerative, commonly producing heel pain that is often worse with the first steps in the morning or after a period of rest. Plantar fascial fibromatosis is different. It is a benign fibroblastic disorder that produces firm nodules or thickening within the plantar fascia and is also known as Ledderhose disease.
Through September 30, 2026, plantar fasciitis is listed as an inclusion term under M72.2, Plantar fascial fibromatosis. That placement can make the conditions appear interchangeable, but they are clinically different. With the FY2027 update, the inclusion term “Plantar fasciitis” is deleted from M72.2 and a new category, M67.A, is added specifically for plantar fasciitis.
The new plantar fasciitis code structure includes the following:
- M67.A01 Plantar fasciitis, right foot
- M67.A02 Plantar fasciitis, left foot
- M67.A09 Plantar fasciitis, unspecified foot
Plantar fascial fibromatosis remains classified under M72.2, but the category is also expanded to capture laterality. Ledderhose disease is added as an inclusion term, reinforcing that the fibromatosis codes identify the nodular fibroblastic condition rather than plantar fasciitis. The new code choices are:
- M72.20 Plantar fascial fibromatosis, unspecified foot
- M72.21 Plantar fascial fibromatosis, right foot
- M72.22 Plantar fascial fibromatosis, left foot
To apply the change, review this scenario. A patient is evaluated for sharp right heel pain that is most severe after getting out of bed. The physician’s final diagnosis is right plantar fasciitis. For an encounter on or after October 1, 2026, the proper code assignment is M67.A01, Plantar fasciitis, right foot. M72.21 would not be appropriate because the physician did not diagnose plantar fascial fibromatosis.
Now consider a second patient with a firm nodule along the medial plantar fascia of the left foot. Following evaluation, the physician documents plantar fascial fibromatosis, also referred to as Ledderhose disease. The proper code assignment is M72.22, Plantar fascial fibromatosis, left foot. Even though both patients have a condition involving the plantar fascia, the code pathways are no longer the same.
Two additional points. First, the Excludes1 note under M72.8 is revised to direct plantar fasciitis to M67.A0-, supporting the separation of the two conditions. Second, the FY2027 codes apply to applicable encounters and inpatient discharges occurring on or after October 1, 2026. Services provided before that date must be coded using the code set in effect for the applicable date.
The revised structure gives coding professionals greater specificity, but accurate assignment will depend on documentation that clearly distinguishes plantar fasciitis from plantar fascial fibromatosis and identifies laterality.
About the Author
Dianna Foley, RHIA, CCS, CDIP, CHPS, has 25 years of HIM experience. She earned her bachelor’s degree from the University of Cincinnati and holds RHIA, CHPS, CDIP, and CCS certifications from AHIMA. Dianna’s an AHIMA-approved ICD-10-CM/PCS trainer, an AHIMA-published author, a participant in AHIMA credential item writing and exam development, and served on the AHIMA Nominating Committee. Dianna has held various HIM positions and is now an independent coding consultant. She previously served as a program director for Medical Coding and HIT. She presents on coding topics at the national, state, and regional levels and serves as OHIMA’s Education Coordinator.





