The Centers for Medicare & Medicaid Services (CMS) has released updates to its International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM) system diagnosis codes for fiscal year (FY) 2023. ICD-10-CM codes, which will increase from 72,750 to 73,639, impact all provider types in both the inpatient and outpatient settings. The updates are effective beginning October 1, 2022. Some of the additions for 2023 include the following: 1. Certain infectious and parasitic diseases. 2. Endocrine, nutritional, and metabolic diseases. 3. Mental, behavioral, and neurodevelopmental disorders. 4. Diseases of the nervous system. 5. Diseases of the digestive system.

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ICD-10-CM Updates Take
Effect in October 2022

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Mikki Fazzio, RHIT, CCS
Content Integrity Consultant, Principal

3. Article
Summary
The Centers for Medicare & Medicaid Services (CMS) has
released updates to its International Classification of
Diseases, 10th Revision, Clinical Modification (ICD-10-
CM) system diagnosis codes for fiscal year (FY) 2023. ICD-
10-CM codes, which will increase from 72,750 to 73,639,
impact all provider types in both the inpatient and
outpatient settings. The updates are effective beginning
October 1, 2022. Some of the additions for 2023 include
the following:
1. Certain infectious and parasitic diseases.
2. Endocrine, nutritional, and metabolic diseases.
3. Mental, behavioral, and neurodevelopmental disorders.
4. Diseases of the nervous system.
5. Diseases of the digestive system.

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ICD-10-CM Updates
The Centers for Medicare & Medicaid Services (CMS) has released the fiscal
year (FY) 2023 updates to the International Classification of Diseases, 10th
Revision, Clinical Modification (ICD-10-CM) system. All provider types in both
the inpatient and outpatient settings use the ICD-10-CM system.
The FY 2023 updates include 1,176 additions, 287 deletions, and 28 revisions.
This brings the total of diagnosis codes to 73,639—an increase from 72,750
for FY 2022. The updates are effective beginning October 1, 2022.

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FY 2023 ICD-10-CM Additions

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FY 2023 ICD-10-CM Additions
 Two codes for acute and chronic candidiasis of the vulva and vagina.
Chapter 1: Certain Infectious and Parasitic Diseases

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FY 2023 ICD-10-CM Additions
 Four codes for hemolytic-uremic syndrome.
 10 codes for Von Willebrand disease.
 Four codes for heparin-induced thrombocytopenia.
 One code for other platelet activating anti-PF4 disorders.
 One code for activated phosphoinositide 3-kinase delta syndrome (APDS).
Chapter 3: Diseases of Blood/Blood-Forming Organs and
Disorders Involving Immune Mechanism

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FY 2023 ICD-10-CM Additions
 Seven codes regarding short stature and growth factor deficiencies.
 Four codes for metabolic acidosis.
Chapter 4: Endocrine, Nutritional, and Metabolic Diseases

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FY 2023 ICD-10-CM Additions
 69 codes describing various types of dementia.
 Two codes for mild neurocognitive disorder.
 10 codes describing alcohol, opioid, sedative, cocaine, hallucinogen, inhalant, cannabis,
and other psychoactive or stimulant use.
 Two codes for grief disorder and other reactions to severe stress.
Chapter 5: Mental, Behavioral, and Neurodevelopmental Disorders

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FY 2023 ICD-10-CM Additions
 10 codes describing limb-girdle muscular dystrophy.
 One code for postural orthostatic tachycardia syndrome (POTS).
 One code for myalgic encephalomyelitis/chronic fatigue syndrome.
 Two codes describing post-viral or post-infection fatigue syndrome.
Chapter 6: Diseases of the Nervous System

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FY 2023 ICD-10-CM Additions
 One code for refractory angina pectoris.
 Eight codes for atherosclerosis of the coronary artery.
 Two codes for pericardial effusion.
 Two codes for nonrheumatic mitral valve disorders.
 Three codes for tachycardia.
 Four codes for dissection of the ascending aorta, aortic arch, descending thoracic aorta, and thoracic aorta.
 22 codes describing various types of aortic aneurisms.
 One code for antineutrophilic cytoplasmic antibody [ANCA] vasculitis.
Chapter 9: Diseases of the Circulatory System

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FY 2023 ICD-10-CM Additions
 One code for transfusion-associated dyspnea (TAD).
Chapter 10: Diseases of the Respiratory System

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FY 2023 ICD-10-CM Additions
 One code for hepatic encephalopathy.
Chapter 11: Diseases of the Digestive System

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FY 2023 ICD-10-CM Additions
 Six codes describing intervertebral annulus fibrosus defect.
 Four codes describing muscle wasting and atrophy.
 20 codes describing slipped upper femoral epiphysis.
 Five codes describing injuries associated with chest compression and cardiopulmonary resuscitation.
Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue

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FY 2023 ICD-10-CM Additions
 Two codes for nephropathy induced by contrast or other drugs.
 One code for Fournier disease of the vagina and vulva.
 One code for adenomyosis of the uterus.
 134 codes for various types and locations of endometriosis.
 One code for a cesarean scar defect or uterine niche (also called an isthmocele).
Chapter 14: Diseases of the Genitourinary System

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FY 2023 ICD-10-CM Additions
 70 codes describing maternal care for suspected central nervous system (CNS)
malformation or damage in the fetus including agenesis of the corpus callosum,
anencephaly, choroid plexus cysts, encephalocele, holoprosencephaly,
hydrocephaly, microcephaly, spina bifida, and unspecified CNS malformation.
 9 codes describing maternal care for suspected chromosomal abnormality in the
fetus, including trisomy 18, trisomy 21, Turner Syndrome, sex chromosome
abnormalities, and other or unspecified chromosomal abnormalities.
 56 codes describing maternal care for other suspected fetal abnormality and
damage including facial, cardiac, pulmonary, gastrointestinal, genitourinary,
musculoskeletal, and upper/lower extremity anomalies.
Chapter 15: Pregnancy, Childbirth, and the Puerperium

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FY 2023 ICD-10-CM Additions
 10 codes for various types of apneas of the newborn.
Chapter 16: Certain Conditions Originating in the Perinatal Period

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FY 2023 ICD-10-CM Additions
 12 codes for various types of septal defects.
 Three codes for PTEN tumor, Crowden, and Von Hippel-Lindau syndrome.
 One code for other phakomatoses.
Chapter 17: Congenital Malformations, Deformations,
and Chromosomal Abnormalities

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FY 2023 ICD-10-CM Additions
 Three codes for concussions when the loss of consciousness status
is unknown.
 Three codes for cerebral edema when the loss of consciousness status
is unknown.
 Six codes for traumatic brain injury when the loss of consciousness
status is unknown.
 15 codes for brain contusion and laceration when the loss of
consciousness status is unknown.
 18 codes for brain hemorrhage when the loss of consciousness status
is unknown.
 12 codes for various types of intracranial injuries when the loss of
consciousness status is unknown.
 29 codes for primary blast injury of the brain when the loss of
consciousness status is unknown.
 18 codes for poisoning, adverse effects, and underdosing of
methamphetamines.
Chapter 19: Injury, Poisoning, and Certain Other Consequences of External Causes

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FY 2023 ICD-10-CM Additions
 474 codes regarding accidents and injuries involving motorcycles and
electric (assisted) bicycles.
 Three codes describing being caught, crushed, jammed, or pinched
between a moving and stationary object.
Chapter 20: External Causes of Morbidity

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FY 2023 ICD-10-CM Additions
 15 codes for long-term (current) use of various drugs.
 14 codes for patient or caregiver noncompliance with dietary,
medication, or other medical treatment and regimen.
 Nine codes for personal history of various disorders.
 Two codes for transitional or socioeconomic factors counseling.
 One code for conditions related to home physiologic monitoring device
ruled out.
 Three codes for transportation or financial insecurity or material
hardship.
 One code for risk of suffocation under another while sleeping.
Chapter 21: Factors Influencing Health Status and Contact with Health Services

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2023 ICD-10-CM Deletions

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2023 ICD-10-CM Deletions
There are 287 deletions. CMS is expanding digits for all the deleted
codes and replacing them with the additions above to provide greater
detail in reporting.
Deletions

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2023 ICD-10-CM Revisions

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2023 ICD-10-CM Revisions
For code range C8440-C8449, which describes peripheral T-cell lymphoma, the words
“not classified” have been changed to “not elsewhere classified” in the long description.
This is also the case for code C946, Myelodysplastic disease.
The code description for F0150, vascular dementia without behavioral disturbance, has
been changed to“Vascular dementia, unspecified severity, without behavioral
disturbance, psychotic disturbance, mood disturbance, and anxiety.”CMS has made the
same wording changes for F0280, dementia in other diseases classified elsewhere
without behavioral disturbance, and F0390, unspecified dementia without behavioral
disturbance.
The code description for G3109, other frontotemporal dementia has been changed to
“other frontotemporal neurocognitive disorder.” Also, for code G3183, dementia with
Lewy bodies, the word “dementia” has been changed to “neurocognitive disorder.”
Revisions

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2023 ICD-10-CM Revisions
The code description for G3184, mild cognitive impairment, so stated, has been changed
to “mild cognitive impairment of uncertain or unknown etiology.”
For codes K3532 and K3533 for acute appendicitis with perforation, CMS has added the
words “and gangrene” to the long description.
For code range M93011 through M93033 for slipped upper femoral epiphysis, the long
description now includes the word “stable.”
CMS will publish these codes in the 2023 ICD-10-CM codebook, but they are available for
review now within Vitalware® by Health Catalyst products.
Revisions

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