Kathryn S. Tierney, MSN, APRN, FNP-BC, FAANP

PRONOUNS: she/her/hers
Center for Gender Medicine and Wellness & Middlesex Health Multispecialty Group - Endocrinology
Primary Specialty: Endocrinology
  • Accepting New Patients
Schedule an Appointment
Kathryn S. Tierney, MSN, APRN, FNP-BC, FAANP

About Me

Specialties/Areas of Care


Transgender Hormone Therapy

LGBTQ+ Health

Diabetes Management

Special Training

LGBTQ+ Health

Languages Spoken



Kathryn (Katy) S. Tierney, MSN, APRN, FNP-BC, FAANP is the Medical Director of the Middlesex Health Center for Gender Medicine and Wellness and a nurse practitioner at Middlesex Health Multispecialty Group - Endocrinology.

Education & Training

Katy is certified by the American Nurses Credentialing Center as a Family Nurse Practitioner.  She completed her Master of Science in Nursing at the Yale University School of Nursing, where she also earned a certificate in nursing. Katy holds a Bachelor of Arts in Biological Sciences from Smith College.

Clinical Expertise

Transgender Medicine
In addition to coordinating transgender medicine services across Middlesex Health and working to ensure that all patients have equitable access to the highest quality health care, Katy provides hormone therapy for transgender patients.

Katy cares for patients with conditions that affect the endocrine system, such as diabetes, thyroid disorders, calcium disorders and adrenal insufficiency. Katy's expertise in diabetes management includes insulin pumps or continuous glucose sensors.

More About Katy

In addition to her active clinical practice, Katy is a clinical instructor at the Yale University School of Nursing, Quinnipiac University and the University of Connecticut School of Nursing. She has also given academic presentations at numerous local and national conferences.

Katy is fluent in Spanish.

Special Interests

Diabetes Management
Transgender Medicine

Education & Training

Graduate Yale University School of Nursing, New Haven, CT
Undergraduate Smith College, Northampton, MA

Board Certification

American Nurses Credentialing Center

Locations & Appointments

1 Office Location

1Middlesex Health MultiSpecialty Group - Endocrinology - Middletown

540 Saybrook Road
Suite 210
Middletown, CT 06457
Middlesex Health MultiSpecialty Group - Endocrinology - Middletown

Insurance Accepted

Middlesex Health treats patients in their emergency departments regardless of their ability to pay.

  • Multiplan
  • ConnectiCare
  • Centivo
  • Harvard Pilgrim Health Care
  • United Healthcare
  • United Healthcare (including Golden Rule, UMR, United Behavioral Health, United Integrated Resources)
  • Aetna
  • Oxford Healthplans
  • Medicare
  • Connecticut State Medicaid (Husky) A, B, C, D, Charter Oak
  • Northeast Health Direct
  • Healthcare Value Management
  • CarePartners of Connecticut
  • Champus/Tricare
  • Value Options (Behavioral Health services only)
  • MHN (Behavioral Health services only)
  • Blue Cross & Blue Shield
  • Private Health Systems (PHCS)
  • Cigna
  • Cigna (including Starbridge and Great West)
  • HMC

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