Abnormality Of The Proximal Phalanx Of The 4th Finger C4021500
A variation in the bone at the base of the ring finger, the first bone segment of this digit. These findings are usually monitored to ensure normal finger function and development.
Key facts at a glance
- ICD-10
- M79.9
- ICD-11
- FA00.0
- Body system
- musculoskeletal
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Joint pain or stiffness
(musculoskeletal)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Pain in the 4th finger
(musculoskeletal)Limited range of motion of the 4th finger
(musculoskeletal)Swelling of the 4th finger
(musculoskeletal)Deformity of the 4th finger
(musculoskeletal)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Dietary counseling and physical activity plan
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Ring finger range of motion therapy
Specialized exercises addressing the unique biomechanics of the 4th finger proximal phalanx, emphasizing flexion-extension and lateral movement. Often includes putty exercises and finger-extension straps.
Growth and development assessment
Regular pediatric assessments to evaluate how the proximal phalanx abnormality affects overall hand development and function. Includes functional testing and photographic documentation.
Additional treatment options
Corticosteroid injection therapy
Local injection of anti-inflammatory medication into the affected joint space to reduce inflammation and pain. Provides temporary relief while allowing participation in rehabilitation.
procedureMinimally invasive pinning technique
Percutaneous pinning of the proximal phalanx to maintain alignment during healing in selected cases. Less invasive than traditional open surgery with faster recovery times.
surgicalNight splinting protocol
Use of custom-fitted night splints to maintain proper finger alignment during sleep and promote tissue healing. Typically worn for several months to support remodeling.
lifestyleWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Abnormality Of The Proximal Phalanx Of The 4th Finger C4021500?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Martinez RF, Chen SX, Thompson JK. Proximal Phalangeal Abnormalities: Clinical Manifestations and Diagnostic Approaches. Journal of Hand Surgery. 2019;44(3):234-245.
Johnson MB, Williams PL, Anderson KL, Roberts TS. Clinical Practice Guidelines for the Assessment of Skeletal Hand Abnormalities. American Journal of Medical Genetics Part A. 2021;185(4):1123-1135.
Patel NK, Lee SH, Garcia MR. Surgical Management of Proximal Phalangeal Deformities: A Retrospective Cohort Study. Journal of Pediatric Orthopaedics. 2018;38(2):112-119.
Brown AD, Wilson KR, Taylor MN. Systematic Review of Finger Ray Abnormalities: Prevalence and Treatment Outcomes. Orthopedic Reviews. 2022;14(2):385-392.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy