FY2025
Effective from
- Code-level rules changed
Overweight and obesity
Category — select a more specific code
CDC/NCHS · FY2025obesity complicating pregnancy, childbirth and the puerperium, if applicable (O99.21-)
For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.
Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.
Official coding guidelines → · CMS ↗First observed · 2015-10-01
Latest recorded change · FY2025
Effective from
Overweight and obesity
Category — select a more specific code
CDC/NCHS · FY2025| All editions | Effective from | Code history |
|---|---|---|
| FY2016 | 2015-10-01 | First observed |
| FY2017 | 2016-10-01 | No tabular change |
| FY2018 | 2017-10-01 | No tabular change |
| FY2019 | 2018-10-01 | No tabular change |
| FY2020 | 2019-10-01 | Code-level rules changed |
| FY2020 · April | 2020-04-01 | No tabular change |
| FY2021 | 2020-10-01 | No tabular change |
| FY2021 · 01-01 | 2021-01-01 | No tabular change |
| FY2022 | 2021-10-01 | No tabular change |
| FY2022 · 04-01 | 2022-04-01 | No tabular change |
| FY2023 | 2022-10-01 | No tabular change |
| FY2023 · 04-01 | 2023-04-01 | No tabular change |
| FY2024 | 2023-10-01 | No tabular change |
| FY2024 · 04-01 | 2024-04-01 | No tabular change |
| FY2025 | 2024-10-01 | Code-level rules changed |
| FY2025 · 04-01 | 2025-04-01 | No tabular change |
| FY2026 | 2025-10-01 | No tabular change |
| FY2026 · April | 2026-04-01 | No tabular change |
| FY2027 | 2026-10-01 | No tabular change |
obesity complicating pregnancy, childbirth and the puerperium, if applicable (O99.21-)
All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.
E66.0Obesity due to excess caloriesCategory · further specificity requiredE66.1Drug-induced obesityBillable / specificE66.2Morbid (severe) obesity with alveolar hypoventilationBillable / specificE66.3OverweightBillable / specificE66.8Other obesityCategory · further specificity requiredE66.9Obesity, unspecifiedBillable / specificOfficial titles and instructions are preserved in their source language. Official sources ↗
Use additional code · obesity (E66.-)
Use additional code · code to identify the type of obesity (E66.-)
Excludes 1 · obesity (E66.-)
Code first · obesity (E66.-)