2027 Code Changes Take Effect Oct. 1, 2026
Samuel A. Collins
| DIGITAL EXCLUSIVE
Let’s start with a quick question related to diagnosis coding: When do the 2027 ICD-10-CM diagnosis codes become effective? The obvious answer would seem to be Jan. 1, 2027; however, the 2027 ICD-10-CM code set actually becomes effective Oct. 1, 2026. 1, which means 2027 changes are right around the corner.
As always, I like to look at the update through a chiropractic lens. The good news is that the changes affecting commonly used chiropractic diagnoses are relatively limited.
Plantar Fasciitis Gets a New Category
The change most likely to affect a chiropractic office involves plantar fasciitis. For 2027, plantar fasciitis moves from M72.2 into a new M67.A category with laterality:
- M67.A01 – Plantar fasciitis, right foot
- M67.A02 – Plantar fasciitis, left foot
- M67.A09 – Plantar fasciitis, unspecified foot
At the same time, M72.2 is retained for plantar fascial fibromatosis and is expanded to distinguish laterality:
- M72.20 – Plantar fascial fibromatosis, unspecified foot
- M72.21 – Plantar fascial fibromatosis, right foot
- M72.22 – Plantar fascial fibromatosis, left foot
This is more than simply changing a code number. Plantar fasciitis and plantar fascial fibromatosis are different clinical conditions, and the 2027 code set separates them more clearly.
Don't Confuse Plantar Fasciitis With Plantar Fascial Fibromatosis
Plantar fasciitis generally presents as a degenerative or overuse condition involving the plantar fascia, often at or near its calcaneal insertion. Patients commonly report plantar heel pain that is particularly noticeable with the first steps after a period of rest.
Plantar fascial fibromatosis, also known as Ledderhose disease, is different. It involves a benign fibrous-tissue proliferation within the plantar fascia. A patient may have a palpable nodule or lump, often along the medial or central arch, with pain or pressure associated with standing or walking.
The distinction matters because the diagnosis documented in the patient's record should determine the code, not simply the location of the patient's pain.
A Code Deletion for Personal-Injury Practices
Practices treating personal-injury or automobile-accident patients should also be aware that the S23.420 series for sternoclavicular sprain is deleted for 2027. If this code is stored in your EHR favorites, diagnosis lists, templates, or superbill, review it before Oct. 1. Do not simply substitute another code because it looks similar. Review the clinical documentation and select the diagnosis that accurately describes the patient's condition.
The Bigger Issue: Choosing the Best Diagnosis
The annual ICD-10 update is a good reminder that diagnosis selection is not simply about finding a code that will get the claim paid. The ICD-10-CM Official Guidelines for Coding and Reporting direct providers to report the condition or reason for the encounter that is chiefly responsible for the services provided and to code to the highest level of specificity supported by the medical record.
For chiropractic care, the diagnosis should make clinical sense in relation to the services being performed. For example, if the examination establishes cervical segmental and somatic dysfunction and the treatment is directed toward that condition, an appropriate M99.01 diagnosis may be more meaningful than simply reporting neck pain.
Likewise, if the documentation supports a specific condition, don't automatically default to an unspecified symptom code. But the reverse is also true: don't select a more specific or more serious diagnosis simply because it may appear to provide a stronger justification for treatment.
What Is the "Best" Diagnosis?
The best available diagnosis is not necessarily the most severe diagnosis, the diagnosis with the most impressive terminology or the diagnosis that results in fewer claim edits. The best diagnosis is the one that is:
- Clinically accurate
- Supported by the examination and documentation
- Specific to the extent the record supports
- Relevant to the reason for the encounter
- Consistent with the treatment being provided
There is an important distinction between choosing the best-supported diagnosis and trying to find a diagnosis that supports a predetermined treatment plan. When you establish a diagnosis and treatment plan for an extended period of care, be critical in evaluating whether the severity, complexity and clinical findings actually support the proposed duration and frequency of treatment.
The diagnosis, examination findings, goals, and treatment plan should tell the same clinical story.
Prepare Before October 1
Before the 2027 code set becomes effective, chiropractic offices should review:
- EHR diagnosis favorites and pick lists
- SOAP-note templates
- Superbills
- Billing-system diagnosis lists
- Treatment-plan templates
- Personal-injury diagnosis lists
- Any diagnosis-to-treatment or diagnosis-to-CPT associations
The 2027 ICD-10-CM update may not dramatically change the codes most chiropractors use every day, but it is an excellent opportunity to review how diagnoses are selected and documented. Don't simply ask yourself, What code can I use? Ask, What diagnosis is actually supported by my clinical findings and documentation? That diagnosis is the most defensible.
