FY2027 ICD-10-CM code changes: new, deleted and revised codes

ICD-10-CM changes for fiscal year 2027, effective October 1, 2026: 238 new code, 21 deleted code, 15 no longer billable, 4 description revised. Use the new codes for dates of service on or after the effective date; deleted codes are still used for earlier dates of service. Each code links to its page with coding notes and Medicare coverage.

New codes (238)

Code	Description	Replaces
C78.31	Secondary malignant neoplasm of larynx	C78.39
C78.32	Secondary malignant neoplasm of pharynx	C78.39
C79.83	Secondary malignant neoplasm of oral cavity	C79.89
D69.11	Glanzmann thrombasthenia	D69.1
D69.19	Other qualitative platelet defects	D69.1
E89.83	Postprocedural hypoglycemia following a procedure
E89.830	Post bariatric hypoglycemia	E89.89
E89.838	Other postprocedural hypoglycemia	E89.89
F64.A	Gender identity disorder, in remission	F64.9
I42.00	Dilated cardiomyopathy, unspecified	I42.0
I42.01	Familial-genetic dilated cardiomyopathy	I42.0
I42.09	Other dilated cardiomyopathy	I42.0
I42.81	Arrhythmogenic cardiomyopathy	I42.8
I42.89	Other cardiomyopathies not elsewhere classified	I42.8
I47.22	Catecholaminergic polymorphic ventricular tachycardia [CPVT]	I47.29
I49.81	Brugada syndrome	I49.8
I49.82	Ventricular bigeminy	I49.8
I49.89	Other specified cardiac arrhythmias not elsewhere classified	I49.8
J34.83	Odontogenic sinusitis
J34.830	Odontogenic sinusitis, maxillary sinus	J34.89
J34.831	Odontogenic sinusitis, ethmoid sinus	J34.89
J34.832	Odontogenic sinusitis, frontal sinus	J34.89
J34.833	Odontogenic sinusitis, sphenoid sinus	J34.89
J34.839	Odontogenic sinusitis, unspecified	J34.89
J4B	Pulmonary mycetoma	B47, J98.8, B37.1, B38.0, B38.1, B38.2, B44.1
K31.B	Hypertrophic pyloric stenosis, in childhood	Q40.0
K6A	Diseases of the pelvis, not elsewhere classified
K6A.0	Pelvic abscess
K6A.01	Prevesical abscess	K68.19
K6A.09	Other pelvic abscess	K68.19, K65.1
K6A.8	Other diseases of the pelvis, not elsewhere classified	K92.89, N39.8, N50.89, N94.89, R68.89
K74.0A	Hepatic fibrosis, moderate fibrosis	K74.01
K76.83	Intestinal failure-associated liver disease	K90.83
L02.237	Carbuncle of flank	L02.232
M04.3	VEXAS syndrome	M04.8
M67.A	Plantar fasciitis
M67.A0	Plantar fasciitis, foot
M67.A01	Plantar fasciitis, right foot	M72.2
M67.A02	Plantar fasciitis, left foot	M72.2
M67.A09	Plantar fasciitis, unspecified foot	M72.2
M72.20	Plantar fascial fibromatosis, unspecified foot	M72.2
M72.21	Plantar fascial fibromatosis, right foot	M72.2
M72.22	Plantar fascial fibromatosis, left foot	M72.2
M86.8X11	Other osteomyelitis, right shoulder	M86.8X1
M86.8X12	Other osteomyelitis, left shoulder	M86.8X1
M86.8X19	Other osteomyelitis, unspecified shoulder	M86.8X1
M86.8X21	Other osteomyelitis, right upper arm	M86.8X2
M86.8X22	Other osteomyelitis, left upper arm	M86.8X2
M86.8X29	Other osteomyelitis, unspecified upper arm	M86.8X2
M86.8X31	Other osteomyelitis, right forearm	M86.8X3
M86.8X32	Other osteomyelitis, left forearm	M86.8X3
M86.8X39	Other osteomyelitis, unspecified forearm	M86.8X3
M86.8X41	Other osteomyelitis, right hand	M86.8X4
M86.8X42	Other osteomyelitis, left hand	M86.8X4
M86.8X49	Other osteomyelitis, unspecified hand	M86.8X4
M86.8X51	Other osteomyelitis, right thigh	M86.8X5
M86.8X52	Other osteomyelitis, left thigh	M86.8X5
M86.8X59	Other osteomyelitis, unspecified thigh	M86.8X5
M86.8X61	Other osteomyelitis, right lower leg	M86.8X6
M86.8X62	Other osteomyelitis, left lower leg	M86.8X6
M86.8X69	Other osteomyelitis, unspecified lower leg	M86.8X6
M86.8X71	Other osteomyelitis, right ankle and foot	M86.8X7
M86.8X72	Other osteomyelitis, left ankle and foot	M86.8X7
M86.8X79	Other osteomyelitis, unspecified ankle and foot	M86.8X7
M86.8X80	Other osteomyelitis, skull	M86.8X8
M86.8X81	Other osteomyelitis, face and sinuses	M86.8X8
M86.8X89	Other osteomyelitis, other site	M86.8X8
N99.86	Intraoperative and postprocedural complications and disorders of breast
N99.860	Intraoperative and postprocedural nipple ischemia	N99.89
N99.861	Intraoperative and postprocedural nipple necrosis	N99.89
O00.12	Interstitial ectopic pregnancy without intrauterine pregnancy
O00.121	Right interstitial ectopic pregnancy without intrauterine pregnancy	O00.101
O00.122	Left interstitial ectopic pregnancy without intrauterine pregnancy	O00.102
O00.129	Unspecified interstitial ectopic pregnancy without intrauterine pregnancy	O00.109
O00.13	Interstitial ectopic pregnancy with intrauterine pregnancy
O00.131	Right interstitial ectopic pregnancy with intrauterine pregnancy	O00.111
O00.132	Left interstitial ectopic pregnancy with intrauterine pregnancy	O00.112
O00.139	Unspecified interstitial ectopic pregnancy with intrauterine pregnancy	O00.119
O00.3	Cesarean scar ectopic pregnancy
O00.31	Cesarean scar ectopic pregnancy without intrauterine pregnancy	O00.80
O00.32	Cesarean scar ectopic pregnancy with intrauterine pregnancy	O00.81
O00.4	Cervical ectopic pregnancy
O00.41	Cervical ectopic pregnancy without intrauterine pregnancy	O00.80
O00.42	Cervical ectopic pregnancy with intrauterine pregnancy	O00.81
O00.5	Cornual ectopic pregnancy
O00.51	Cornual ectopic pregnancy without intrauterine pregnancy
O00.511	Right cornual ectopic pregnancy without intrauterine pregnancy	O00.80
O00.512	Left cornual ectopic pregnancy without intrauterine pregnancy	O00.80
O00.519	Unspecified cornual ectopic pregnancy without intrauterine pregnancy	O00.80
O00.52	Cornual ectopic pregnancy with intrauterine pregnancy
O00.521	Right cornual ectopic pregnancy with intrauterine pregnancy	O00.81
O00.522	Left cornual ectopic pregnancy with intrauterine pregnancy	O00.81
O00.529	Unspecified cornual ectopic pregnancy with intrauterine pregnancy	O00.81
O31.4	Continuing pregnancy after vanishing twin syndrome of one fetus or more
O31.40	Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspecified trimester
O31.40X0	Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspecified trimester, not applicable or unspecified	O31.8X90
O31.40X1	Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspecified trimester, fetus 1	O31.8X91
O31.40X2	Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspecified trimester, fetus 2	O31.8X92
O31.40X3	Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspecified trimester, fetus 3	O31.8X93
O31.40X4	Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspecified trimester, fetus 4	O31.8X94
O31.40X5	Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspecified trimester, fetus 5	O31.8X95
O31.40X9	Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspecified trimester, other fetus	O31.8X99
O31.41	Continuing pregnancy after vanishing twin syndrome of one fetus or more, first trimester
O31.41X0	Continuing pregnancy after vanishing twin syndrome of one fetus or more, first trimester, not applicable or unspecified	O31.8X10
O31.41X1	Continuing pregnancy after vanishing twin syndrome of one fetus or more, first trimester, fetus 1	O31.8X11
O31.41X2	Continuing pregnancy after vanishing twin syndrome of one fetus or more, first trimester, fetus 2	O31.8X12
O31.41X3	Continuing pregnancy after vanishing twin syndrome of one fetus or more, first trimester, fetus 3	O31.8X13
O31.41X4	Continuing pregnancy after vanishing twin syndrome of one fetus or more, first trimester, fetus 4	O31.8X14
O31.41X5	Continuing pregnancy after vanishing twin syndrome of one fetus or more, first trimester, fetus 5	O31.8X15
O31.41X9	Continuing pregnancy after vanishing twin syndrome of one fetus or more, first trimester, other fetus	O31.8X19
O31.42	Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester
O31.42X0	Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, not applicable or unspecified	O31.8X20
O31.42X1	Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 1	O31.8X21
O31.42X2	Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 2	O31.8X22
O31.42X3	Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 3	O31.8X23
O31.42X4	Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 4	O31.8X24
O31.42X5	Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 5	O31.8X25
O31.42X9	Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, other fetus	O31.8X29
O31.43	Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimester
O31.43X0	Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimester, not applicable or unspecified	O31.8X30
O31.43X1	Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimester, fetus 1	O31.8X31
O31.43X2	Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimester, fetus 2	O31.8X32
O31.43X3	Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimester, fetus 3	O31.8X33
O31.43X4	Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimester, fetus 4	O31.8X34
O31.43X5	Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimester, fetus 5	O31.8X35
O31.43X9	Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimester, other fetus	O31.8X39
Q87.A	Loeys-Dietz syndrome	Q87.89
QA1	Genetic disorders associated with neoplasms, not elsewhere classified
QA1.7	Inherited neoplasm predisposition syndromes involving multiple systems, not elsewhere classified
QA1.71	Lynch syndrome
QA1.79	Other inherited neoplasm predisposition syndrome of multiple systems
QA1.790	Familial cancer syndrome with pathogenic BRCA1 mutation
QA1.791	Familial cancer syndrome with pathogenic BRCA2 mutation
QA1.792	Li Fraumeni syndrome
QA1.798	Other inherited neoplasm predisposition syndrome of multiple systems
R78.72	Abnormal gadolinium level in blood	R78.79
T52.81	Toxic effects of alkenes
T52.811	Toxic effect of alkenes, accidental (unintentional)
T52.811A	Toxic effect of alkenes, accidental (unintentional), initial encounter	T52.8X1A
T52.811D	Toxic effect of alkenes, accidental (unintentional), subsequent encounter	T52.8X1D
T52.811S	Toxic effect of alkenes, accidental (unintentional), sequela	T52.8X1S
T52.812	Toxic effect of alkenes, intentional self-harm
T52.812A	Toxic effect of alkenes, intentional self-harm, initial encounter	T52.8X2A
T52.812D	Toxic effect of alkenes, intentional self-harm, subsequent encounter	T52.8X2D
T52.812S	Toxic effect of alkenes, intentional self-harm, sequela	T52.8X2S
T52.813	Toxic effect of alkenes, assault
T52.813A	Toxic effect of alkenes, assault, initial encounter	T52.8X3A
T52.813D	Toxic effect of alkenes, assault, subsequent encounter	T52.8X3D
T52.813S	Toxic effect of alkenes, assault, sequela	T52.8X3S
T52.814	Toxic effect of alkenes, undetermined
T52.814A	Toxic effect of alkenes, undetermined, initial encounter	T52.8X4A
T52.814D	Toxic effect of alkenes, undetermined, subsequent encounter	T52.8X4D
T52.814S	Toxic effect of alkenes, undetermined, sequela	T52.8X4S
T52.82	Toxic effects of cycloparaffins
T52.821	Toxic effect of cycloparaffins, accidental (unintentional)
T52.821A	Toxic effect of cycloparaffins, accidental (unintentional), initial encounter	T52.8X1A
T52.821D	Toxic effect of cycloparaffins, accidental (unintentional), subsequent encounter	T52.8X1D
T52.821S	Toxic effect of cycloparaffins, accidental (unintentional), sequela	T52.8X1S
T52.822	Toxic effect of cycloparaffins, intentional self-harm
T52.822A	Toxic effect of cycloparaffins, intentional self-harm, initial encounter	T52.8X2A
T52.822D	Toxic effect of cycloparaffins, intentional self-harm, subsequent encounter	T52.8X2D
T52.822S	Toxic effect of cycloparaffins, intentional self-harm, sequela	T52.8X2S
T52.823	Toxic effect of cycloparaffins, assault
T52.823A	Toxic effect of cycloparaffins, assault, initial encounter	T52.8X3A
T52.823D	Toxic effect of cycloparaffins, assault, subsequent encounter	T52.8X3D
T52.823S	Toxic effect of cycloparaffins, assault, sequela	T52.8X3S
T52.824	Toxic effect of cycloparaffins, undetermined
T52.824A	Toxic effect of cycloparaffins, undetermined, initial encounter	T52.8X4A
T52.824D	Toxic effect of cycloparaffins, undetermined, subsequent encounter	T52.8X4D
T52.824S	Toxic effect of cycloparaffins, undetermined, sequela	T52.8X4S
T52.89	Toxic effects of other organic solvents
T52.891	Toxic effect of other organic solvents, accidental (unintentional)
T52.891A	Toxic effect of other organic solvents, accidental (unintentional), initial encounter	T52.8X1A
T52.891D	Toxic effect of other organic solvents, accidental (unintentional), subsequent encounter	T52.8X1D
T52.891S	Toxic effect of other organic solvents, accidental (unintentional), sequela	T52.8X1S
T52.892	Toxic effect of other organic solvents, intentional self-harm
T52.892A	Toxic effect of other organic solvents, intentional self-harm, initial encounter	T52.8X2A
T52.892D	Toxic effect of other organic solvents, intentional self-harm, subsequent encounter	T52.8X2D
T52.892S	Toxic effect of other organic solvents, intentional self-harm, sequela	T52.8X2S
T52.893	Toxic effect of other organic solvents, assault
T52.893A	Toxic effect of other organic solvents, assault, initial encounter	T52.8X3A
T52.893D	Toxic effect of other organic solvents, assault, subsequent encounter	T52.8X3D
T52.893S	Toxic effect of other organic solvents, assault, sequela	T52.8X3S
T52.894	Toxic effect of other organic solvents, undetermined
T52.894A	Toxic effect of other organic solvents, undetermined, initial encounter	T52.8X4A
T52.894D	Toxic effect of other organic solvents, undetermined, subsequent encounter	T52.8X4D
T52.894S	Toxic effect of other organic solvents, undetermined, sequela	T52.8X4S
T59.82	Toxic effects of hexamethylene diisocyanate
T59.821	Toxic effect of hexamethylene diisocyanate, accidental (unintentional)
T59.821A	Toxic effect of hexamethylene diisocyanate, accidental (unintentional), initial encounter	T59.891A
T59.821D	Toxic effect of hexamethylene diisocyanate, accidental (unintentional), subsequent encounter	T59.891D
T59.821S	Toxic effect of hexamethylene diisocyanate, accidental (unintentional), sequela	T59.891S
T59.822	Toxic effect of hexamethylene diisocyanate, intentional self-harm
T59.822A	Toxic effect of hexamethylene diisocyanate, intentional self-harm, initial encounter	T59.892A
T59.822D	Toxic effect of hexamethylene diisocyanate, intentional self-harm, subsequent encounter	T59.892D
T59.822S	Toxic effect of hexamethylene diisocyanate, intentional self-harm, sequela	T59.892S
T59.823	Toxic effect of hexamethylene diisocyanate, assault
T59.823A	Toxic effect of hexamethylene diisocyanate, assault, initial encounter	T59.893A
T59.823D	Toxic effect of hexamethylene diisocyanate, assault, subsequent encounter	T59.893D
T59.823S	Toxic effect of hexamethylene diisocyanate, assault, sequela	T59.893S
T59.824	Toxic effect of hexamethylene diisocyanate, undetermined
T59.824A	Toxic effect of hexamethylene diisocyanate, undetermined, initial encounter	T59.894A
T59.824D	Toxic effect of hexamethylene diisocyanate, undetermined, subsequent encounter	T59.894D
T59.824S	Toxic effect of hexamethylene diisocyanate, undetermined, sequela	T59.894S
T65.85	Toxic effect of medetomidine
T65.851	Toxic effect of medetomidine, accidental (unintentional)
T65.851A	Toxic effect of medetomidine, accidental (unintentional), initial encounter	T65.891A
T65.851D	Toxic effect of medetomidine, accidental (unintentional), subsequent encounter	T65.891D
T65.851S	Toxic effect of medetomidine, accidental (unintentional), sequela	T65.891S
T65.852	Toxic effect of medetomidine, intentional self-harm
T65.852A	Toxic effect of medetomidine, intentional self-harm, initial encounter	T65.892A
T65.852D	Toxic effect of medetomidine, intentional self-harm, subsequent encounter	T65.892D
T65.852S	Toxic effect of medetomidine, intentional self-harm, sequela	T65.892S
T65.853	Toxic effect of medetomidine, assault
T65.853A	Toxic effect of medetomidine, assault, initial encounter	T65.893A
T65.853D	Toxic effect of medetomidine, assault, subsequent encounter	T65.893D
T65.853S	Toxic effect of medetomidine, assault, sequela	T65.893S
T65.854	Toxic effect of medetomidine, undetermined
T65.854A	Toxic effect of medetomidine, undetermined, initial encounter	T65.894A
T65.854D	Toxic effect of medetomidine, undetermined, subsequent encounter	T65.894D
T65.854S	Toxic effect of medetomidine, undetermined, sequela	T65.894S
Z68.18	Body mass index [BMI] 18.4 or less, adult	Z68.1
Z68.19	Body mass index [BMI] 18.5-19.9, adult	Z68.1
Z77.013	Contact with and (suspected) exposure to gadolinium	Z77.018
Z77.32	Contact with and (suspected) exposure to burn pits in war theater	Z77.39
Z77.33	Contact with and (suspected) exposure to Agent Orange	Z77.39
Z77.4	Contact with and (suspected) exposure to blast overpressure
Z77.40	Contact with and (suspected) exposure to unspecified blast overpressure	Z77.9
Z77.41	Contact with and (suspected) exposure to low-level blast overpressure	Z77.9
Z77.42	Contact with and (suspected) exposure to high-level blast overpressure	Z77.9
Z77.49	Contact with and (suspected) exposure to other blast overpressure	Z77.9
Z86.17	Personal history of Clostridioides difficile infection	Z86.19
Z87.8901	Personal history of social gender transition	Z87.890
Z87.8902	Personal history of medical gender transition	Z87.890
Z87.8903	Personal history of surgical gender transition	Z87.890
Z87.8904	Personal history of intersex surgery	Z87.890
Z87.8909	Personal history of unspecified gender transition	Z87.890
Z87.893	Personal history of gender detransition	Z87.898

Deleted codes (21)

Code	Description	Use instead
S23.420	Sprain of sternoclavicular (joint) (ligament)
S23.420A	Sprain of sternoclavicular (joint) (ligament), initial encounter
S23.420D	Sprain of sternoclavicular (joint) (ligament), subsequent encounter
S23.420S	Sprain of sternoclavicular (joint) (ligament), sequela
T52.8X	Toxic effects of other organic solvents
T52.8X1	Toxic effect of other organic solvents, accidental (unintentional)
T52.8X1A	Toxic effect of other organic solvents, accidental (unintentional), initial encounter	T52.811A, T52.821A, T52.891A
T52.8X1D	Toxic effect of other organic solvents, accidental (unintentional), subsequent encounter	T52.811D, T52.821D, T52.891D
T52.8X1S	Toxic effect of other organic solvents, accidental (unintentional), sequela	T52.811S, T52.821S, T52.891S
T52.8X2	Toxic effect of other organic solvents, intentional self-harm
T52.8X2A	Toxic effect of other organic solvents, intentional self-harm, initial encounter	T52.812A, T52.822A, T52.892A
T52.8X2D	Toxic effect of other organic solvents, intentional self-harm, subsequent encounter	T52.812D, T52.822D, T52.892D
T52.8X2S	Toxic effect of other organic solvents, intentional self-harm, sequela	T52.812S, T52.822S, T52.892S
T52.8X3	Toxic effect of other organic solvents, assault
T52.8X3A	Toxic effect of other organic solvents, assault, initial encounter	T52.813A, T52.823A, T52.893A
T52.8X3D	Toxic effect of other organic solvents, assault, subsequent encounter	T52.813D, T52.823D, T52.893D
T52.8X3S	Toxic effect of other organic solvents, assault, sequela	T52.813S, T52.823S, T52.893S
T52.8X4	Toxic effect of other organic solvents, undetermined
T52.8X4A	Toxic effect of other organic solvents, undetermined, initial encounter	T52.814A, T52.824A, T52.894A
T52.8X4D	Toxic effect of other organic solvents, undetermined, subsequent encounter	T52.814D, T52.824D, T52.894D
T52.8X4S	Toxic effect of other organic solvents, undetermined, sequela	T52.814S, T52.824S, T52.894S

No longer billable (15)

Code	Description	Use instead
D69.1	Qualitative platelet defects	D69.11, D69.19
I42.0	Dilated cardiomyopathy	I42.00, I42.01, I42.09
I42.8	Other cardiomyopathies	I42.81, I42.89
I49.8	Other specified cardiac arrhythmias	I49.81, I49.82, I49.89
M72.2	Plantar fascial fibromatosis	M72.20, M72.21, M72.22
M86.8X1	Other osteomyelitis, shoulder	M86.8X11, M86.8X12, M86.8X19
M86.8X2	Other osteomyelitis, upper arm	M86.8X21, M86.8X22, M86.8X29
M86.8X3	Other osteomyelitis, forearm	M86.8X31, M86.8X32, M86.8X39
M86.8X4	Other osteomyelitis, hand	M86.8X41, M86.8X42, M86.8X49
M86.8X5	Other osteomyelitis, thigh	M86.8X51, M86.8X52, M86.8X59
M86.8X6	Other osteomyelitis, lower leg	M86.8X61, M86.8X62, M86.8X69
M86.8X7	Other osteomyelitis, ankle and foot	M86.8X71, M86.8X72, M86.8X79
M86.8X8	Other osteomyelitis, other site	M86.8X80, M86.8X81, M86.8X89
Z68.1	Body mass index [BMI] 19.9 or less, adult	Z68.18, Z68.19
Z87.890	Personal history of sex reassignment	Z87.8901, Z87.8902, Z87.8903, Z87.8904, Z87.8909

Revised descriptions (4)

Code	New description	Old description
L02.232	Carbuncle of back [any part, except buttock and flank]	Carbuncle of back [any part, except buttock]
L03.312	Cellulitis of back [any part except buttock and flank]	Cellulitis of back [any part except buttock]
L03.322	Acute lymphangitis of back [any part except buttock and flank]	Acute lymphangitis of back [any part except buttock]
Z29.14	Encounter for prophylactic rabies immune globulin	Encounter for prophylactic rabies immune globin

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.