Effective October 1, 2026
FY2027 ICD-10-CM Updates: What Changed and Why It Matters
Every year, the ICD-10-CM diagnosis code set is updated to better reflect today’s healthcare and to allow providers to describe a patient’s condition more accurately. The FY2027 update follows that same trend. It isn’t about changing how providers practice medicine, but about giving coders more detailed options to tell the patient’s story.
This year there are 228 total code changes, including:
- 190 new diagnosis codes
- 30 deleted codes
- 8 code description revisions
In other words, most of the changes are simply adding more specific diagnosis codes rather than removing existing ones.
The Biggest Areas of Change
âś… Injuries and Accidents
The largest group of updates involves injuries, poisonings, and accidents. More than 70 changes were made in this chapter alone.
These new codes allow providers and coders to better describe exactly what happened, making it easier to capture the severity of an injury and support medical necessity.
✅ Pregnancy and Women’s Health
Pregnancy-related coding also saw significant growth, with 44 new diagnosis codes.
The goal is to better describe pregnancy complications and maternal conditions so the medical record more accurately reflects the patient’s care.
âś… Bones, Joints, and Muscles
Another large group of updates affects orthopedic and musculoskeletal conditions.
These changes provide more detailed ways to document problems involving bones, joints, tendons, and muscles, giving providers and coders additional options to describe exactly what is being treated.
âś… Health Status and Preventive Care
Several new codes were also added for health status, follow-up care, and preventive services.
These updates help paint a clearer picture of a patient’s overall health and support quality reporting and population health initiatives.
âś… Other Important Updates
Several specialty areas also received new diagnosis codes, including:
- Heart conditions such as specific types of cardiomyopathy and abnormal heart rhythms.
- Respiratory conditions, including new codes for certain sinus infections and lung fungal infections.
- Digestive disorders, with more specific ways to report stomach and intestinal conditions.
- Blood disorders, including rare platelet disorders.
- Endocrine conditions, such as low blood sugar that develops after bariatric surgery.
- Cancer diagnoses, with new codes for certain metastatic cancers.
- Mental health, with one new diagnosis code added.
- Skin conditions, where several code descriptions were updated for better clarity.
What Does This Mean for Providers?
For most providers, very little changes in day-to-day documentation.
The biggest takeaway is that the more specific your documentation is, the more accurately your coders can assign the new diagnosis codes.
For example, instead of simply documenting that a patient has a heart condition or an injury, including the exact type, location, cause, or severity helps ensure the most accurate code is selected.
Why It Matters
Accurate diagnosis coding impacts much more than billing. It also supports:
- Better communication throughout the healthcare team
- More accurate quality reporting
- Appropriate reimbursement
- Risk adjustment and value-based care programs
- More reliable healthcare data used for research and public health
The Bottom Line
The FY2027 ICD-10-CM update is all about telling a more complete patient story. Rather than dramatically changing coding rules, the new codes give providers and coders better tools to describe the patient’s condition with greater detail and accuracy.
As documentation becomes more specific, coding becomes more accurate, and that benefits providers, healthcare organizations, payers, and, most importantly, patients.
Appendix: Complete List of FY2027 ICD-10-CM Code Changes
The tables below list every FY2027 ICD-10-CM code addition, deletion, and revision referenced above, effective October 1, 2026.
Appendix A - Added Codes (190)
| Code | Description |
| C7831 | Secondary malignant neoplasm of larynx |
| C7832 | Secondary malignant neoplasm of pharynx |
| C7983 | Secondary malignant neoplasm of oral cavity |
| D6911 | Glanzmann thrombasthenia |
| D6919 | Other qualitative platelet defects |
| E89830 | Post bariatric hypoglycemia |
| E89838 | Other postprocedural hypoglycemia |
| F64A | Gender identity disorder, in remission |
| I4200 | Dilated cardiomyopathy, unspecified |
| I4201 | Familial-genetic dilated cardiomyopathy |
| I4209 | Other dilated cardiomyopathy |
| I4281 | Arrhythmogenic cardiomyopathy |
| I4289 | Other cardiomyopathies not elsewhere classified |
| I4722 | Catecholaminergic polymorphic ventricular tachycardia [CPVT] |
| I4981 | Brugada syndrome |
| I4982 | Ventricular bigeminy |
| I4989 | Other specified cardiac arrhythmias not elsewhere classified |
| J34830 | Odontogenic sinusitis, maxillary sinus |
| J34831 | Odontogenic sinusitis, ethmoid sinus |
| J34832 | Odontogenic sinusitis, frontal sinus |
| J34833 | Odontogenic sinusitis, sphenoid sinus |
| J34839 | Odontogenic sinusitis, unspecified |
| J4B | Pulmonary mycetoma |
| K31B | Hypertrophic pyloric stenosis, in childhood |
| K6A01 | Prevesical abscess |
| K6A09 | Other pelvic abscess |
| K6A8 | Other diseases of the pelvis, not elsewhere classified |
| K740A | Hepatic fibrosis, moderate fibrosis |
| K7683 | Intestinal failure-associated liver disease |
| L02237 | Carbuncle of flank |
| M043 | VEXAS syndrome |
| M67A01 | Plantar fasciitis, right foot |
| M67A02 | Plantar fasciitis, left foot |
| M67A09 | Plantar fasciitis, unspecified foot |
| M7220 | Plantar fascial fibromatosis, unspecified foot |
| M7221 | Plantar fascial fibromatosis, right foot |
| M7222 | Plantar fascial fibromatosis, left foot |
| M868X11 | Other osteomyelitis, right shoulder |
| M868X12 | Other osteomyelitis, left shoulder |
| M868X19 | Other osteomyelitis, unspecified shoulder |
| M868X21 | Other osteomyelitis, right upper arm |
| M868X22 | Other osteomyelitis, left upper arm |
| M868X29 | Other osteomyelitis, unspecified upper arm |
| M868X31 | Other osteomyelitis, right forearm |
| M868X32 | Other osteomyelitis, left forearm |
| M868X39 | Other osteomyelitis, unspecified forearm |
| M868X41 | Other osteomyelitis, right hand |
| M868X42 | Other osteomyelitis, left hand |
| M868X49 | Other osteomyelitis, unspecified hand |
| M868X51 | Other osteomyelitis, right thigh |
| M868X52 | Other osteomyelitis, left thigh |
| M868X59 | Other osteomyelitis, unspecified thigh |
| M868X61 | Other osteomyelitis, right lower leg |
| M868X62 | Other osteomyelitis, left lower leg |
| M868X69 | Other osteomyelitis, unspecified lower leg |
| M868X71 | Other osteomyelitis, right ankle and foot |
| M868X72 | Other osteomyelitis, left ankle and foot |
| M868X79 | Other osteomyelitis, unspecified ankle and foot |
| M868X80 | Other osteomyelitis, skull |
| M868X81 | Other osteomyelitis, face and sinuses |
| M868X89 | Other osteomyelitis, other site |
| N99860 | Intraoperative and postprocedural nipple ischemia |
| N99861 | Intraoperative and postprocedural nipple necrosis |
| O00121 | Right interstitial ectopic pregnancy without intrauterine pregnancy |
| O00122 | Left interstitial ectopic pregnancy without intrauterine pregnancy |
| O00129 | Unspecified interstitial ectopic pregnancy without intrauterine pregnancy |
| O00131 | Right interstitial ectopic pregnancy with intrauterine pregnancy |
| O00132 | Left interstitial ectopic pregnancy with intrauterine pregnancy |
| O00139 | Unspecified interstitial ectopic pregnancy with intrauterine pregnancy |
| O0031 | Cesarean scar ectopic pregnancy without intrauterine pregnancy |
| O0032 | Cesarean scar ectopic pregnancy with intrauterine pregnancy |
| O0041 | Cervical ectopic pregnancy without intrauterine pregnancy |
| O0042 | Cervical ectopic pregnancy with intrauterine pregnancy |
| O00511 | Right cornual ectopic pregnancy without intrauterine pregnancy |
| O00512 | Left cornual ectopic pregnancy without intrauterine pregnancy |
| O00519 | Unspecified cornual ectopic pregnancy without intrauterine pregnancy |
| O00521 | Right cornual ectopic pregnancy with intrauterine pregnancy |
| O00522 | Left cornual ectopic pregnancy with intrauterine pregnancy |
| O00529 | Unspecified cornual ectopic pregnancy with intrauterine pregnancy |
| O3140X0 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspe |
| O3140X1 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspe |
| O3140X2 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspe |
| O3140X3 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspe |
| O3140X4 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspe |
| O3140X5 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspe |
| O3140X9 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspe |
| O3141X0 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, first |
| O3141X1 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, first |
| O3141X2 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, first |
| O3141X3 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, first |
| O3141X4 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, first |
| O3141X5 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, first |
| O3141X9 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, first |
| O3142X0 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, secon |
| O3142X1 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, secon |
| O3142X2 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, secon |
| O3142X3 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, secon |
| O3142X4 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, secon |
| O3142X5 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, secon |
| O3142X9 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, secon |
| O3143X0 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, third |
| O3143X1 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, third |
| O3143X2 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, third |
| O3143X3 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, third |
| O3143X4 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, third |
| O3143X5 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, third |
| O3143X9 | Continuing pregnancy after vanishing twin syndrome of one fetus or more, third |
| Q87A | Loeys-Dietz syndrome |
| QA171 | Lynch syndrome |
| QA1790 | Familial cancer syndrome with pathogenic BRCA1 mutation |
| QA1791 | Familial cancer syndrome with pathogenic BRCA2 mutation |
| QA1792 | Li Fraumeni syndrome |
| QA1798 | Other inherited neoplasm predisposition syndrome of multiple systems |
| R7872 | Abnormal gadolinium level in blood |
| T52811A | Toxic effect of alkenes, accidental (unintentional), initial encounter |
| T52811D | Toxic effect of alkenes, accidental (unintentional), subsequent encounter |
| T52811S | Toxic effect of alkenes, accidental (unintentional), sequela |
| T52812A | Toxic effect of alkenes, intentional self-harm, initial encounter |
| T52812D | Toxic effect of alkenes, intentional self-harm, subsequent encounter |
| T52812S | Toxic effect of alkenes, intentional self-harm, sequela |
| T52813A | Toxic effect of alkenes, assault, initial encounter |
| T52813D | Toxic effect of alkenes, assault, subsequent encounter |
| T52813S | Toxic effect of alkenes, assault, sequela |
| T52814A | Toxic effect of alkenes, undetermined, initial encounter |
| T52814D | Toxic effect of alkenes, undetermined, subsequent encounter |
| T52814S | Toxic effect of alkenes, undetermined, sequela |
| T52821A | Toxic effect of cycloparaffins, accidental (unintentional), initial encounter |
| T52821D | Toxic effect of cycloparaffins, accidental (unintentional), subsequent encount |
| T52821S | Toxic effect of cycloparaffins, accidental (unintentional), sequela |
| T52822A | Toxic effect of cycloparaffins, intentional self-harm, initial encounter |
| T52822D | Toxic effect of cycloparaffins, intentional self-harm, subsequent encounter |
| T52822S | Toxic effect of cycloparaffins, intentional self-harm, sequela |
| T52823A | Toxic effect of cycloparaffins, assault, initial encounter |
| T52823D | Toxic effect of cycloparaffins, assault, subsequent encounter |
| T52823S | Toxic effect of cycloparaffins, assault, sequela |
| T52824A | Toxic effect of cycloparaffins, undetermined, initial encounter |
| T52824D | Toxic effect of cycloparaffins, undetermined, subsequent encounter |
| T52824S | Toxic effect of cycloparaffins, undetermined, sequela |
| T52891A | Toxic effect of other organic solvents, accidental (unintentional), initial en |
| T52891D | Toxic effect of other organic solvents, accidental (unintentional), subsequent |
| T52891S | Toxic effect of other organic solvents, accidental (unintentional), sequela |
| T52892A | Toxic effect of other organic solvents, intentional self-harm, initial encount |
| T52892D | Toxic effect of other organic solvents, intentional self-harm, subsequent enco |
| T52892S | Toxic effect of other organic solvents, intentional self-harm, sequela |
| T52893A | Toxic effect of other organic solvents, assault, initial encounter |
| T52893D | Toxic effect of other organic solvents, assault, subsequent encounter |
| T52893S | Toxic effect of other organic solvents, assault, sequela |
| T52894A | Toxic effect of other organic solvents, undetermined, initial encounter |
| T52894D | Toxic effect of other organic solvents, undetermined, subsequent encounter |
| T52894S | Toxic effect of other organic solvents, undetermined, sequela |
| T59821A | Toxic effect of hexamethylene diisocyanate, accidental (unintentional), initia |
| T59821D | Toxic effect of hexamethylene diisocyanate, accidental (unintentional), subseq |
| T59821S | Toxic effect of hexamethylene diisocyanate, accidental (unintentional), sequel |
| T59822A | Toxic effect of hexamethylene diisocyanate, intentional self-harm, initial enc |
| T59822D | Toxic effect of hexamethylene diisocyanate, intentional self-harm, subsequent |
| T59822S | Toxic effect of hexamethylene diisocyanate, intentional self-harm, sequela |
| T59823A | Toxic effect of hexamethylene diisocyanate, assault, initial encounter |
| T59823D | Toxic effect of hexamethylene diisocyanate, assault, subsequent encounter |
| T59823S | Toxic effect of hexamethylene diisocyanate, assault, sequela |
| T59824A | Toxic effect of hexamethylene diisocyanate, undetermined, initial encounter |
| T59824D | Toxic effect of hexamethylene diisocyanate, undetermined, subsequent encounter |
| T59824S | Toxic effect of hexamethylene diisocyanate, undetermined, sequela |
| T65851A | Toxic effect of medetomidine, accidental (unintentional), initial encounter |
| T65851D | Toxic effect of medetomidine, accidental (unintentional), subsequent encounter |
| T65851S | Toxic effect of medetomidine, accidental (unintentional), sequela |
| T65852A | Toxic effect of medetomidine, intentional self-harm, initial encounter |
| T65852D | Toxic effect of medetomidine, intentional self-harm, subsequent encounter |
| T65852S | Toxic effect of medetomidine, intentional self-harm, sequela |
| T65853A | Toxic effect of medetomidine, assault, initial encounter |
| T65853D | Toxic effect of medetomidine, assault, subsequent encounter |
| T65853S | Toxic effect of medetomidine, assault, sequela |
| T65854A | Toxic effect of medetomidine, undetermined, initial encounter |
| T65854D | Toxic effect of medetomidine, undetermined, subsequent encounter |
| T65854S | Toxic effect of medetomidine, undetermined, sequela |
| Z6818 | Body mass index [BMI] 18.4 or less, adult |
| Z6819 | Body mass index [BMI] 18.5-19.9, adult |
| Z77013 | Contact with and (suspected) exposure to gadolinium |
| Z7732 | Contact with and (suspected) exposure to burn pits in war theater |
| Z7733 | Contact with and (suspected) exposure to Agent Orange |
| Z7740 | Contact with and (suspected) exposure to unspecified blast overpressure |
| Z7741 | Contact with and (suspected) exposure to low-level blast overpressure |
| Z7742 | Contact with and (suspected) exposure to high-level blast overpressure |
| Z7749 | Contact with and (suspected) exposure to other blast overpressure |
| Z8617 | Personal history of Clostridioides difficile infection |
| Z878901 | Personal history of social gender transition |
| Z878902 | Personal history of medical gender transition |
| Z878903 | Personal history of surgical gender transition |
| Z878904 | Personal history of intersex surgery |
| Z878909 | Personal history of unspecified gender transition |
| Z87893 | Personal history of gender detransition |
