The FY 2027 ICD-10-CM update takes effect October 1, 2026. Here’s what chiropractors, healthcare providers, and billing teams need to know before the new code set goes live.
Every year, the ICD-10-CM code set changes and 2027 is no exception.
The FY 2027 update introduces 190 new ICD-10-CM diagnosis codes, deletes 30 codes, and revises 4 code descriptions. The new code set applies to patient encounters from October 1, 2026, through September 30, 2027.
For chiropractic practices, this isn’t simply a coding update to remember once a year. Changes to diagnosis codes can affect how providers document patient conditions, how diagnosis codes are selected in an EHR, how claims are submitted, and how billing teams handle claims after October 1.
You don’t need to overhaul your entire billing process. But you do need to make sure your diagnosis code library, documentation workflows, and billing processes are ready for the new code set.
In this blog, we’ll break down the major FY 2027 ICD-10-CM code updates and explain what they mean for chiropractic practices.
FY 2027 ICD-10-CM Updates at a Glance
| Update | FY 2027 |
| New ICD-10-CM codes | 190 |
| Deleted codes | 30 |
| Revised code descriptions | 4 |
| Effective date | October 1, 2026 |
| Code set applies through | September 30, 2027 |
The official 2027 ICD-10 codes files, including the code tables, tabular list, alphabetic index, addendum, conversion table, and POA-exempt codes, are available through CMS and CDC.
What Are the Biggest Changes in ICD-10-CM for 2027?
The 2027 ICD-10-CM code updates spans many areas of medicine, but several themes stand out:
- More specific diagnosis coding
- Greater anatomical and laterality specificity
- New codes for musculoskeletal conditions
- Expanded pregnancy and maternal-fetal medicine coding
- New genetic and rare-disease codes
- More detailed environmental and toxic exposure coding
- New history and status codes
- Changes to BMI coding
- New and revised instructional and terminology information
1. Plantar Fasciitis Gets More Specific Codes
One of the more relevant musculoskeletal changes for many physical medicine and chiropractic practices is the expansion of plantar fasciitis coding.
Previously, plantar fasciitis and plantar fascial fibromatosis were reported under the same general code structure.
For FY 2027, plantar fasciitis moves into a new M67.A- subcategory.
The new codes distinguish plantar fasciitis by foot:
- M67.A01 – Plantar fasciitis, right foot
- M67.A02 – Plantar fasciitis, left foot
- M67.A09 – Plantar fasciitis, unspecified foot
The update also provides separate codes for plantar fascial fibromatosis.
Why this matters for chiropractors
This is a good example of the broader direction of ICD-10-CM: more specificity at the point of documentation.
If a provider documents plantar fasciitis, the clinical documentation should support which foot is affected whenever that information is known.
Document the condition and the clinically relevant anatomical detail clearly enough that the most specific applicable diagnosis code can be selected.
An EHR with integrated billing system that makes diagnosis-code searching and selection easy can help reduce the friction involved in these changes.
2. Osteomyelitis Coding Becomes More Specific
The FY 2027 update also expands the M86.8X- Other osteomyelitis family.
The expanded structure provides greater specificity around the affected anatomical site, including:
- Multiple sites
- Shoulder, upper arm, and forearm
- Hand, thigh, lower leg
- Ankle and foot
- Other site
- Unspecified site
The expanded code structure also supports greater specificity when documenting the affected anatomy and laterality.
3. More Specific Coding for Secondary Malignancies
The ICD-10 code changes 2027 adds greater specificity to several secondary malignant neoplasm codes.
Examples include:
- C78.31 – Secondary malignant neoplasm of larynx
- C78.32 – Secondary malignant neoplasm of pharynx
- C79.83 – Secondary malignant neoplasm of oral cavity
These changes allow metastatic disease to be documented at a more specific anatomical site than some of the broader codes previously available.
There is also an important change involving carcinoma in situ of the breast (D05.-) and malignant neoplasm of the breast (C50.-): the two code categories can no longer simply be reported together for the same patient when the conditions are documented together.
The takeaway is broader than oncology:
When ICD-10-CM introduces more specific options, providers and coding teams need to pay closer attention to the documentation supporting the diagnosis.
4. New Codes for Plantar and Other Musculoskeletal Conditions
The musculoskeletal chapter contains several changes beyond plantar fasciitis.
The 2027 update expands coding specificity for conditions such as osteomyelitis and introduces a new code for VEXAS syndrome, an acquired autoinflammatory condition.
For chiropractic and physical medicine practices, the larger lesson is the continued movement toward more detailed musculoskeletal coding.
That makes documentation of anatomical location, laterality, specific diagnosis, relevant clinical findings, and encounter details increasingly important.
5. New Codes for Odontogenic Sinusitis
The respiratory chapter adds a new J34.83- subcategory for odontogenic sinusitis. The new structure identifies the affected sinus, including:
- J34.830 – Maxillary sinus
- J34.831 – Ethmoid sinus
- J34.832 – Frontal sinus
- J34.833 – Sphenoid sinus
- J34.839 – Unspecified sinus
6. New Codes for Postprocedural Hypoglycemia
Three new codes address hypoglycemia occurring after a procedure, including post-bariatric hypoglycemia.
These additions include the E89.83- category for postprocedural hypoglycemia.
While this may not directly affect most chiropractic practices, it illustrates how ICD-10-CM continues to create dedicated codes for conditions that previously required less-specific coding.
7. Cardiac Diagnoses Get More Granular
The circulatory chapter receives several notable updates.
One example is I42.0 Dilated cardiomyopathy, which is expanded to distinguish:
- I42.00 – Dilated cardiomyopathy, unspecified
- I42.01 – Familial-genetic dilated cardiomyopathy
- I42.09 – Other dilated cardiomyopathy
Additional coding changes address conditions such as arrhythmogenic cardiomyopathy, Brugada syndrome, catecholaminergic polymorphic ventricular tachycardia, and ventricular bigeminy.
The theme is consistent: clinical specificity is becoming increasingly important in diagnosis coding.
8. Cardiac Diagnoses Get More Granular
One of the largest groups of new codes is in maternal-fetal medicine.
The new O31.4- category addresses continuing pregnancy after vanishing twin syndrome.
The update adds 33 codes in this category, with specificity based on factors such as trimester and fetus.
There are also numerous new codes related to ectopic pregnancy and maternal care involving fetal chromosomal abnormalities.
Although these codes aren’t directly relevant to most chiropractic claims, they represent an important trend in the 2027 release:
ICD-10-CM is increasingly designed to capture clinical circumstances with much greater precision.
9. Cardiac Diagnoses Get More Granular
Several conditions that previously required less-specific coding now have dedicated or more specific options. Examples include:
- VEXAS syndrome
- Loeys-Dietz syndrome
- Lynch syndrome
- Li-Fraumeni syndrome
- Other hereditary and genetic conditions
This matters because diagnosis coding increasingly serves purposes beyond claim reimbursement. More precise codes can improve:
- Clinical documentation
- Patient records
- Research
- Disease surveillance
- Population health analytics
- Longitudinal patient information
10. Cardiac Diagnoses Get More Granular
The FY 2027 update also expands coding related to environmental, occupational, and military exposures. New Z-code options address certain exposure histories, including exposures associated with:
- Burn pit emissions
- Agent Orange
- Blast overpressure
These changes reflect the growing role of ICD-10-CM in documenting a patient’s broader health history, not just the diagnosis being treated during a single encounter.
11. New Codes for Gender Transition History
The 2027 update introduces additional codes for documenting personal history related to gender transition.
Examples include codes for:
- Personal history of social gender transition
- Personal history of medical gender transition
- Personal history of surgical gender transition
- Personal history of gender detransition
There is also a new code for gender identity disorder in remission.
These additions are part of a broader move toward more complete longitudinal patient histories
12. BMI Coding Gets More Specific
BMI coding also receives additional specificity. The update separates lower adult BMI ranges more precisely rather than grouping all low BMI values under one broad category.
For practices that document BMI, this is another reminder that diagnosis and clinical data fields need to remain synchronized with the current code set.
13. Some ICD-10-CM Codes Are Being Deleted
30 codes have been deleted in the new ICD-10 coding updates. One change that has received particular attention is the deletion of the S23.420 series for sternoclavicular sprain.
When a code is deleted, the key issue for a practice isn’t simply knowing that it disappeared.
Your team needs to determine:
- Whether the code appears in your EHR’s diagnosis library
- Whether providers currently use it
- Whether it appears in saved templates or favorites
- Whether billing workflows reference it
- What the appropriate replacement coding pathway is
This is especially important for practices using customized diagnosis lists.
What Do the 2027 ICD-10-CM Changes Mean for Chiropractors?
Not every FY27 ICD-10 code change will affect a chiropractic practice. But every chiropractic practice should still prepare for the update. Why? Because diagnosis codes are connected to much more than the claim form.
If an outdated or deleted diagnosis code remains in the workflow, the problem may not be obvious until a claim is rejected, corrected, or delayed.
For chiropractors, the most practical focus areas are:
1. Review musculoskeletal diagnoses
Look at the diagnoses your providers use most frequently and determine whether any have new, revised, or more specific options.
2. Review laterality
When the new code structure distinguishes right, left, or unspecified, documentation should support the most specific code available.
3. Update diagnosis favorites
If providers have frequently used diagnoses saved as favorites or shortcuts, make sure those selections remain valid after October 1.
4. Review SOAP templates
Diagnosis documentation starts with the clinical note. Make sure templates make it easy for providers to document the information needed to support accurate diagnosis coding.
5. Update billing workflows
Billing teams should review their diagnosis-code libraries and identify deleted or changed codes before claims start flowing under the new code set.
How Should Your Practice Prepare for October 1, 2026?
You don’t need to wait until October to start. Here’s a simple five-step checklist.
Conclusion
The FY 2027 ICD-10-CM update is another step toward more specific, detailed, and clinically meaningful diagnosis coding.
For chiropractic practices, the biggest takeaway isn’t that there are 190 new codes to learn.
It’s that your documentation, EHR, and billing workflow need to be ready for the codes you actually use.
Review your diagnosis list. Check your frequently used musculoskeletal codes. Update your templates and favorites. Train your team. And test your billing workflow before October 1, 2026.
That preparation can help your practice enter the new ICD-10-CM year with fewer surprises and keep your billing moving smoothly.
Related Articles
The Ultimate 2024 ICD-10 Codes Cheat Sheet for Chiropractors
Top 10 Free Resources to Streamline Chiropractic Medical Billing in 2026
The Complete Handbook to Solving Chiropractic Billing Challenges in 2026
Monthly Billing Health Checklist for Chiropractic Practices
Frequently Asked Questions About the 2027 ICD-10-CM Update
Q1: When does the 2027 ICD-10-CM update take effect?
A1: The FY 2027 ICD-10-CM code set takes effect October 1, 2026, and applies to patient encounters through September 30, 2027.
Q2: How many new ICD-10-CM codes are there in 2027?
A2: The FY 2027 update contains 190 new ICD-10-CM codes, 30 deleted codes, and 4 revised codes.
Q3: Are there new ICD-10 codes relevant to chiropractors?
A3: Yes. Among the musculoskeletal changes are new, more specific codes for plantar fasciitis, along with expanded specificity for certain osteomyelitis codes. These changes may be relevant to chiropractic and other musculoskeletal practices.
Q4: Do chiropractors need to update their diagnosis codes every year?
A4: Yes. Practices should review the annual ICD-10-CM update and ensure their EHR, diagnosis favorites, documentation templates, and billing workflows use the current code set.
Q5: What happens if a practice continues using a deleted ICD-10 code?
A5: Using an outdated or deleted diagnosis code can create claim-processing problems and may require corrections. Practices should identify deleted codes before the October 1 effective date and update their workflows accordingly.
Q6: Where can I find the official 2027 ICD-10-CM codes?
A6: CMS and CDC have published the FY 2027 ICD-10-CM files, including the code tables, tabular list, alphabetic index, addendum, and conversion table.
