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Colorado Genetics Laboratory

Cytogenetics & Cytogenomics

Colorado Genetics Laboratory (CGL) is the premiere lab for cytogenetics and cytogenomics in the Rocky Mountain region. We are nationally recognized for excellence​ and provide state-of-the-art cytogenetic testing, as well as full interpretation of results and excellent customer service. Our Laboratory Directors and Genetic Counselors are available to discuss appropriate testing and test interpretation.  In-service presentations and clinical conference support are also available.
Based in Denver, CGL offers full service laboratory testing in prenatal, postnatal, cancer cytogenetics, fluorescence in situ hybridization (FISH), and chromosomal microarray (CMA).


Laboratory Directors
  • Liming Bao, PhD, FACMGG
  • Karen Swisshelm, PhD, FACMGG
  • Mary Haag, PhD, FACMGG
​Certified Cytogenetic Technologists

Over 25 certified cytogenetic technologists with an average of 16 years of experience are on staff to provide the highest quality of patient care.

Genetic Counselors

Analysis and interpretation of abnormal results can be complex. Genetic counselors are on staff to aid in test interpretation and to answer your questions. We strive to ensure the most applicable test is provided for the clinical indication, while minimizing repetitive testing.

Research Inquiries

For Research Inquiries, please visit:  Cytogenetics Service

Client Services

Our client services representatives are ready to assist you with transport of samples, copies of reports, and other special requests.​​​

Toll Free: 888 659-4932
Denver Area: 303 724-5701 ​
Fax: 303 724-5795


12705 E. Montview Blvd., Suite 400
Aurora, CO 80045


​​​​Phones are answered Monday through Friday 8am to 5pm, and Saturday 8am to 4pm (​Mountain Time). If you are unable to reach us, please leave a message. Messages are checked 7 days a week and your call will be returned as soon as possible. ​​​