---
title: "DC 5224 - Thumb, ankylosis of"
diagnostic_code: "5224"
body_system: "Musculoskeletal System"
cfr_section: "§ 4.71a"
canonical: "https://veteranai.co/va-rating-schedule/musculoskeletal/5224-thumb-ankylosis-of"
source: "https://www.ecfr.gov/current/title-38/section-4.71a"
updated: "2026-07-21T19:52:10.084478Z"
---

# DC 5224 - Thumb, ankylosis of

Rated under § 4.71a. Body system: Musculoskeletal System.

## Rating criteria

| Rating | Rating (non-dominant) | Criteria |
| --- | --- | --- |
| 20% | 20% | Unfavorable |
| 10% | 10% | Favorable |

## Notes

- Note: Also consider whether evaluation as amputation is warranted and whether an additional evaluation is warranted for resulting limitation of motion of other digits or interference with overall function of the hand.

# Ankylosis of the Thumb (VA Diagnostic Code 5224)

**Understanding how the VA rates a thumb that no longer bends.**

## What This Condition Is

Ankylosis of the thumb refers to a thumb that has become stiff or fixed in place, limiting or preventing normal movement at the joint. Because the thumb plays a central role in gripping and hand function, the VA evaluates this condition under **Diagnostic Code 5224**, within the **Musculoskeletal System** category and governed by **§ 4.71a** of the rating schedule.

## Available Rating Levels

The VA rates ankylosis of the thumb based on whether the fixed position is considered "favorable" or "unfavorable." Ratings apply to both the dominant and non-dominant (minor) extremity.

| Rating | Criteria | Non-Dominant (Minor) Extremity |
|--------|----------|-------------------------------|
| **20%** | Unfavorable | 20% |
| **10%** | Favorable | 10% |

## What the VA Looks For

When evaluating ankylosis of the thumb, the VA considers the following, as noted in the rating criteria:

- **Whether evaluation as amputation is warranted** — the VA reviews whether the severity of the condition compares to the level of an amputation.
- **Whether an additional evaluation is warranted** for resulting limitation of motion of other digits, or for interference with the overall function of the hand.

These considerations allow the VA to account for how a fixed thumb may affect not just the thumb itself, but the surrounding fingers and the broader use of the hand.

Source: https://www.ecfr.gov/current/title-38/section-4.71a