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ICD-10-CM 2027 diagnosis code

W45.3XXAFishing hook entering through skin, initial encounter

✓ Billable / specificRequires 7th character

W45.3XXA is a valid, billable ICD-10-CM code for fishing hook entering through skin, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About W45.3XXA

W45.3XXA is the ICD-10-CM diagnosis code for fishing hook entering through skin, initial encounter. It belongs to category W45 (foreign body or object entering through skin), block W20-W49 (exposure to inanimate mechanical forces) and chapter 20 (external causes of morbidity). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

The 7th character "A" means initial encounter: use it while the patient is receiving active treatment for the condition.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

It was added in FY2026, effective October 1, 2025.

7th character

Ainitial encounter

Other encounter types for W45.3:

Notes that apply from higher levels

Instructions written at a parent level also apply to W45.3XXA.

› From W45 Foreign body or object entering through skin
Includes
  • foreign body or object embedded in skin
  • nail embedded in skin
Excludes2
  • contact with hand tools (nonpowered) (powered) (W27-W29)
  • contact with other sharp object(s) (W26.-)
  • contact with sharp glass (W25.-)
  • struck by objects (W20-W22)

Broader instructions also apply from W20-W49 Exposure to inanimate mechanical forces and Chapter 20: External causes of morbidity.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2026 (effective 10/1/2025): Added
  • No changes since FY2026.

Common questions about W45.3XXA

Is W45.3XXA billable?

Yes. W45.3XXA is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "A" at the end of W45.3XXA mean?

It is the 7th character for initial encounter. Per the official guidelines, use it while the patient is receiving active treatment for the condition.

Can W45.3XXA be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict W45.3XXA as a principal diagnosis.

Is W45.3XXA a CC or MCC?

No. W45.3XXA is neither a CC nor an MCC under MS-DRG v44.0.