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KS&A (Knowledge, Support, and Action)

Contact Information

P.O. Box 872
Pine, CO 80470-0872

1-888-999-9428 (Voice - Toll-free),
303-400-9040 (Voice), Office
303-838-0753 (FAX),

Internet Resources


KS&A is a non-profit organization addressing the needs of the approximately 1 out of 500 individuals who were born with one or more extra X and/or Y chromosomes, as well as their families and the clinicians, educators and research scientists serving them. Conditions addressed include: 47,XXY; Klinefelter syndrome; Trisomy X; 47,XYY syndrome and the approximately 20 additional variations involving additional X and/or Y chromosomes and mosaicism.



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Date Entered: 2/1/1998
Date Edited: 11/28/2012
Date Revised: 7/31/2012
Health Referral Number: HR2905
Accession Number:

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