Diane R. Keahey, DNP, FNP-BC
Doctor of Nursing Practice & Family Nurse Practitioner
Board-certified Family Nurse Practitioner with 24 years of clinical experience and a Doctorate from the University of Tennessee. Holistic, patient-centered care for all ages, with focus on diabetes, hypertension, anxiety, and women’s and geriatric health.
Whole-person care means caring about more than the chart. I want to know what your day looks like — that’s where real medicine happens. — Diane
A career built on training.
Real credentials, real residencies, real years of practice — the kind of training you want behind your care.
- 01
BSN & MSN, FNP Certification
Earned a Bachelor of Science in Nursing followed by a Master of Science as a Family Nurse Practitioner — the foundation of a full-spectrum primary care career.
- 02
Doctor of Nursing Practice
Completed her DNP at the University of Tennessee, the highest practice-focused degree in nursing — emphasizing evidence-based, patient-centered care.
- 03
24 Years in Practice
Board-certified Family Nurse Practitioner with two decades of holistic primary care across diabetes, hypertension, women’s health, and geriatrics.
Comprehensive, personalized care.
Diane brings depth across the conditions and concerns that matter most to adults in Sherman and the Texoma region.
Family Medicine
Care for the whole household — children, adults, and seniors — under one roof.
Primary Care
Personalized, unhurried visits with a provider who actually knows your history.
Women's Health
Annual exams, contraception, menopause, and bone health — practical, judgment-free care.
Geriatric Care
Polypharmacy review, fall prevention, cognitive screening, and Medicare wellness visits.
Stories from patients
Real experiences from patients who chose Highland Primary Care for their long-term care.
Dr. Sani is incredibly thorough and takes the time to actually listen. I've never felt rushed. He explains everything clearly and genuinely cares about my health.
Finally found a primary care doctor who manages all my conditions in one place. The office is welcoming, staff is friendly, and appointments are easy to book.
Dr. Sani helped me lose 35 pounds through his medical weight loss program. He's knowledgeable, caring, and my whole family now sees him for primary care.
Ready to schedule your visit?
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