Navigating diagnostic updates is vital for maintaining compliant medical billing, and acupuncture practices must prepare for the upcoming 2027 ICD-10-CM changes. Counterintuitively, these updates take effect on October 1, 2026, rather than at the start of the calendar year. A central clinical adjustment involves the differentiation of plantar fasciitis from plantar fascial fibromatosis. Plantar fasciitis transitions to the new M67.A category, demanding specific laterality designations, while M72.2 is reserved strictly for fibromatosis. Beyond code mechanics, acupuncturists must prioritize documentation integrity. Diagnosis selection must truthfully reflect the patient’s evaluated condition rather than what insurance plans favor for reimbursement. Providers should aim for the highest specificity supported by the medical record, ensuring treatments do not improperly dictate diagnoses. Overcoding unrelated historical conditions can undermine medical necessity, making periodic re-evaluation of extended treatment plans essential. As October approaches, clinics should proactively review electronic health records, superbills, SOAP-note templates, and diagnosis favorites. Ultimately, valid coding does not guarantee insurance coverage; clinical documentation must consistently validate care, ensuring codes reflect actual patient conditions rather than reimbursement strategies.