Why Choose Us

We understand that finding out that you or a loved one has Osteogenesis Imperfecta (OI) or Hypophosphatasia (HPP) can be overwhelming.

These "brittle bone" chronic diseases and others are the focus of our program, which provides care across the lifespan from infants to adults. This clinic is unique in that it treats entire families with these lifelong conditions. This clinic is led by knowledgeable staff that are developing innovative research in order to develop guidelines to treat these ultra-rare diseases.

Our cohesive team is here to help you and your family manage these chronic diseases.


  • Get a pulse

    Regular visits and taking care of your health are of the utmost importance. Schedule a visit or contact us today!

  • Medical Counseling

    Reach out to us to discuss your concerns and we will work together to get you the best health care possible!

  • Our Team

    We leverage our resourceful and collaborative medical team to ensure effective and friendly health care.

  • Heredity & Families

    Our medical team works with individuals or whole families, or we start with one and bring others on later.

Our Founders

Our vision is to provide exceptional medical care and world-class discovery opportunities for individuals and families with hereditary bone disorders across the lifespan by bridging resources across the Vanderbilt Medical Center.

Kathryn Dahir, MD

Kathryn McCrystal Dahir, MD

Associate Professor of Medicine
Associate Fellowship Director
Vanderbilt University Medical Center
Endocrinology and Diabetes

Jill Simmons, MD

Jill Simmons, MD


Associate Professor of Pediatrics
Vanderbilt University Medical Center
Pediatrics

Jill Simmons
Jill Simmons, MD
Pediatric Endocrinologist at Vanderbilt Children's Hospital

Meet Robby Novak, one of our amazing patients who is also well known as the "Kid President"! His story is inspiring and lends credo to team-work!

A cohesive and dedicated team is here to help you and your family manage chronic bone diseases.

  • We understand that finding out that you, or a loved one has a rare bone disease can be overwhelming.

  • This clinic is unique in that it treats entire families with lifelong conditions.

Make an appointment or contact us