A Look at ICD-10-CM Updates: From Plantar Fasciitis to Genetic Disorders
ICD-10-CM updates for fiscal year 2027 affect conditions seen in a wide range of healthcare settings, from a common cause of foot pain to inherited cancer risk. Some of these changes introduce distinct codes for diagnoses that previously lacked them, while others separate conditions formerly grouped under one code or add specificity, such as laterality. The key is knowing when a familiar code selection deserves a second look.
The following examples illustrate a range of changes and the documentation details that matter when applying them:
Plantar Fasciitis Gets Its Own Code Family
Plantar fasciitis is moving out of M72.2, which will continue to describe plantar fascial fibromatosis. The new M67.A family identifies plantar fasciitis, with codes for the right foot (M67.A01), left foot (M67.A02), and unspecified foot (M67.A09).
Plantar fascial fibromatosis also gains right, left, and unspecified foot codes under M72.2. This is a change worth checking in frequently used code lists, in coding tools, and in educational materials as the two conditions have different code paths. Documentation of the diagnosis and the affected foot will help coding professionals select the appropriate code.
New Distinctions After a Procedure
The updates introduce E89.830, Post-bariatric hypoglycemia, within a new group for post-procedural hypoglycemia. E89.838, Other post-procedural hypoglycemia, includes post-Nissen fundoplication hypoglycemia. The new group also instructs users to assign an additional code for the hypoglycemia level, if known.
These additions put the relationship between a procedure and the documented condition in focus. A record that identifies hypoglycemia without clearly establishing it as post procedural may call for a different coding decision than one that documents post-bariatric hypoglycemia.
More Specific Ways to Report Inherited Cancer Risk
A new group of codes identifies inherited neoplasm predisposition syndromes involving multiple systems. This group includes QA1.71, Lynch syndrome, as well as distinct codes for familial cancer syndromes with pathogenic BRCA1 and BRCA2 mutations: QA1.790 and QA1.791. Li Fraumeni syndrome is identified by QA1.792.
The new category includes a code also instruction for applicable associated conditions such as genetic susceptibility to malignant neoplasm by site, malignant neoplasms, or personal history of malignant neoplasm.
Added Detail in Cardiovascular Coding
The cardiovascular chapter gains several choices for conditions that previously had less specific representation. Under dilated cardiomyopathy, I42.01 identifies familial-genetic dilated cardiomyopathy, while I42.00 identifies unspecified dilated cardiomyopathy. The update also adds I42.81 for arrhythmogenic cardiomyopathy.
For heart rhythm disorders, new codes include I47.22 for catecholaminergic polymorphic ventricular tachycardia (CPVT), I49.81 for Brugada syndrome, and I49.82 for ventricular bigeminy. The ventricular bigeminy entry includes an instruction to use an additional code, if applicable, for associated symptoms such as dizziness or syncope.
These additions make the provider’s diagnostic wording especially important. A documented type of cardiomyopathy or arrhythmia may now support a more precise code, while an unspecified diagnosis still requires coding at the level the record supports.
Turning the Updates into Everyday Practice
The updates point to a common strategy: remember to look beyond the list of new codes. This includes reviewing full coding guidance, including descriptions, inclusion terms, instructions, and any updated Index pathways that may impact code selection and use.
Coding teams should review codes they use often, update reference materials, and examine how the new, invalidated, and revised codes affect existing workflows. These steps can make the transition more manageable.
To explore the FY 2027 ICD-10-CM changes in greater depth, see AHIMA’s webinar, ICD-10-CM FY 2027 Updates: What’s Changed and How to Apply It.
Robin Tripp, MAS, RHIA, CCS-P, CPC, CRC, is Director of Education for Coding and Revenue Cycle at AHIMA.