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Healthcare Insights

New ICD-10 codes for 2023

Each year, the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS) publish reporting guidelines for the International Classification of Diseases (ICD), 10th revision, also known as ICD-10-CM. The guidelines are based on the World Health Organization’s (WHO) annual updates to the diagnosis lists.

The following list are the diagnosis categories with the highest count of new ICD-10 codes added for 2023.

Top diagnosis categories for new ICD codes

RankICD diagnosis categoryNumber of new codesExplore dataset
1External causes of morbidity477Explore
2Pregnancy, childbirth and the puerperium175Explore
3Genitourinary system127Explore
4External causes of injury and poisoning104Explore
5Mental, behavioral and neurodevelopmental disorders82Explore
6Factors influencing health status/health services45Explore
7Musculoskeletal system and connective tissue33Explore
8Diseases of the circulatory system32Explore
9Nervous system14Explore
10Congenital malformations, deformations and chromosomal abnormalities14Explore
11Endocrine, nutri, and metabolic diseases/immunity disorders11Explore
12Blood and blood-forming organs10Explore
13Originating in the perinatal period10Explore

Fig. 1. Data from the Definitive Healthcare Atlas All-Payor Claims Dataset and supplemented with proprietary research. Claims data is sourced from multiple medical claims clearinghouses in the United States and updated monthly. Data accessed February 2023.

What are the new ICD-10 codes?

The external causes of morbidity category has the most new ICD-10 codes, which includes a variety of electric bicycle and motorcycle injury codes. These new ICD-10 codes begin with “V2”.

The next two categories with the most new codes on the list are pregnancy, childbirth, and the puerperium, and the genitourinary system. The “O35” codes specify specific maternal care for babies in utero. And the “N80” genitourinary system codes give more detail to include anatomic locations, depth, and laterality of endometriosis.

Additional highlights of the new list of ICD-10 codes include:

How many new ICD-10 codes were added for 2023?

The 2023 ICD-10 update includes nearly 1,200 new billable ICD-10 codes. In comparison, only about 160 new codes were added for 2022. The transition from a fee-for-service to a value-based care healthcare model can drive a greater focus on code specificity that fully captures the acuity of the patient and the care they are provided.

How many ICD-10 codes were deleted for 2023?

About 285 ICD-10 codes were deleted for 2023 and an additional 28 codes were revised.

How often are ICD-10 codes updated?

The WHO makes annual updates to the ICD-10 diagnosis list. In the U.S., the updated ICD-10-CM diagnosis codes take effect October 1st each year.

The current code sets are to be used for discharges and patient encounters occurring from October 1, 2022 through September 2023.

What is the latest version of ICD codes?

In February 2022, the 11th revision, or ICD-11, from the WHO went into effect and more than 30 countries are using the new classification system.

The U.S. is still using ICD-10 and it is not yet known when American hospitals will begin using ICD-11.

Learn more

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