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Meet the team
behind Lutanen Health

Each member of our practice brings deep clinical expertise, a commitment to personalized medicine, and a shared vision for reimagining what healthcare can be.

Four medical professionals, three women and one man, sit and stand around a modern tan sofa in an office. Two have stethoscopes, and all are smiling—an approachable concierge medicine team in business or business-casual attire.

We’ve intentionally built a small, highly collaborative team to ensure every patient receives thoughtful, individualized attention. From our physicians to our health coaches and operational staff, every person at Lutanen plays a vital role in supporting your health journey. Today and for the long run.

Advanced Diagnostics & Biometrics
/
Personalized for Performance
Resilience by Design
Holistic approach
Preventive by Nature
Built for Longevity

Our
team

We are proud to introduce the people who bring the vision of Lutanen Health to life. While titles and credentials matter, what truly sets this team apart is their passion for building meaningful relationships and providing care that is both data-driven and deeply human.

Each team member is hand-selected not only for their expertise, but for their alignment with our values: precision, empathy, collaboration, and continuous innovation.

Dr. Jay Luthar dark hair, a beard, and glasses smiles while wearing a blue plaid suit, blue shirt, and patterned tie, standing indoors with a green and white abstract logo in the background.

Jay Luthar, MD

Founder and Medical Director
Instructor in Medicine, Part-time at Harvard Medical School

Meet Dr. Luthar
A woman with blonde hair and blue eyes, wearing a tan ribbed shirt, smiles at the camera. She stands indoors with shelves and a green patterned wall in the background.

Sara Rantanen

Director of Operations Co-Founder

Meet Sara
A woman with long light brown hair, wearing a black lace top and black cardigan, smiles at the camera. The background features green and brown tones with framed objects on the wall.

Julia Loewenthal MD

Internal Medicine Primary Care
Geriatrician, Director Housecalls Program
Assistant Professor, Harvard Medical School

Meet Dr. Loewenthal
A woman with long dark hair, wearing a brown sweater and a necklace, smiles at the camera in an indoor setting with blurred wall decor in the background.

Rachel Grosklags RN

Lead RN

Meet Rachel
A woman with long blonde hair is smiling at the camera. She is wearing a black leather jacket over a leopard print top. The background features a green and wood panel wall with framed items.

Charlene Tierney

Director of Business Development

Meet Charlene
Kaylee LeCavalier wearing a burgundy top, smiles at the camera in an indoor setting with certificates and artwork in the background.

Kaylee LeCavalier

Director of Human Performance

Meet Kaylee
Tori Bradley smiles at the camera. She is wearing a green ribbed top and stands indoors with a blurred background.

Tori Bradley

Registered Nurse

Meet Tori
Izzy Antonelli wearing a black top and a houndstooth blazer, smiles at the camera. She has small hoop earrings and a necklace. The background features shelves with framed certificates and green decor.

Izzy Antonelli

Strength & Conditioning Specialist

Meet Izzy

At Lutanen Health, we believe exceptional care begins with an exceptional team

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Our Mission

Our
mission

At Lutanen Health, our mission is to create a transformative primary care experience that empowers patients to thrive across every dimension of health.

We care about the human, not just their condition.

Our practice is guided by four core commitments

Precision

We rely on the most advanced diagnostic tools and clinical data to inform every decision.

Presence

We take the time to listen, understand, and build deep relationships with our patients.

Proactivity

We believe in catching issues before they begin and optimizing health, not just managing disease.

Partnership

We walk alongside you, collaborating on a tailored health strategy that evolves with your needs.

The minds and hearts behind your wellbeing

Our doctors are on faculty at Harvard Medical School and on staff at Brigham Women’s Hospital, giving our patients seamless connectivity into the Mass General Brigham network.

Two smiling healthcare professionals, a woman and a man, both wearing stethoscopes around their necks, stand side by side against a dark background, representing a dedicated concierge medicine team.

Careers at Lutanen

Two smiling healthcare professionals, a woman and a man, both wearing stethoscopes around their necks, stand side by side against a dark background, representing a dedicated concierge medicine team.

We are always looking for mission-aligned professionals who want to do meaningful work in a collaborative, forward-thinking environment.

At Lutanen Health, we offer more than a job. We offer a place to grow, innovate, and be part of a team that’s raising the standard of care. Whether you’re a clinician, coach, or operations specialist, you’ll make a meaningful impact on patients’ lives and help shape the future of medicine.

If you’re passionate about longevity science, precision care, and holistic healing, we’d love to hear from you.

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Designed around you

Lutanen Health offers a new paradigm in medicine. One that honors both the art and science of healing.

Our practice is intentionally small, allowing us to build lasting, meaningful partnerships with each of our patients. Whether you’re seeking advanced preventive care, performance optimization, or the peace of mind that comes from having a physician who knows you fully, Lutanen Health is here to help you thrive.

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