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Our Story · Established Practice

Compassionate primary
care, built on real relationships.

Highland Primary Care is a long-established Sherman, TX clinic where unhurried, board-certified care is still the standard. We serve patients across Sherman, Denison, Pottsboro and the wider Texoma region.

Schedule Your Visit Meet the team
  • Board-certified
  • 300 N Highland Ave, Sherman
  • Mon–Fri · 8a–5p
Dr. Shahram N. Sani, MD — Medical Director, Highland Primary Care Sherman TX
  • Board-Certified Physicians
  • 25+ Years Experience
  • On-Site Labs
  • Accepting New Patients
By the numbers

A practice built to last.

Real time, real expertise, real follow-through — for the families we've cared for, and the ones we're meeting today.

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Years of clinical experience

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Board-certified providers

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Services under one roof

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Insurance plans accepted

Mission

We listen first. Then we treat.

At Highland Primary Care we believe the foundation of good health is a strong, ongoing relationship between a patient and their physician. We take the time to listen, ask the right questions, and develop a plan that fits your life — not a template.

Our team serves Sherman, Denison, Pottsboro and the wider Texoma region with a full spectrum of primary care: preventive medicine, chronic disease management, mental health, medical weight loss, hormone optimization and acute care — all from board-certified physicians who live in this community.

Explore our services
"Appointments are unhurried. Your story matters more than a 7-minute time slot."

Dr. Shahram N. Sani, MD

Medical Director · Board-Certified Internal Medicine

What sets us apart

Quiet competence. Real access.

We're not a chain. We're not a mail-order clinic. We're a long-established Sherman practice with real credentials and real follow-through.

  • Board-certified physicians

    Every provider is board-certified in Internal Medicine, Family Medicine, or holds a Doctorate of Nursing Practice.

  • 25+ years of experience

    Decades of practice in Sherman means deep clinical judgment — and continuity for the families we serve.

  • On-site labs

    Bloodwork, A1c, lipid panels and screenings completed right in our office — no second trip, no extra bill.

  • Same-day appointments

    Acute illnesses and urgent concerns are often handled the day you call. Real access, not weeks of waiting.

  • Most insurance welcome

    Medicare, Medicaid, Blue Cross Blue Shield, Aetna, Cigna, UnitedHealthcare, Humana, Tricare and more.

  • Whole-person primary care

    Preventive medicine, chronic disease, mental health, weight loss, hormone optimization — under one roof.

Our Team

Meet your providers

Board-certified physicians and providers dedicated to your long-term health and well-being.

Dr. Shahram N. Sani, MD — Board-Certified Internal Medicine Physician & Medical Director

Dr. Shahram N. Sani, MD

Board-Certified Internal Medicine Physician & Medical Director

  • Internal Medicine
  • Primary Care
  • Men's Health
  • Chronic Disease Mgmt

Board-certified Internal Medicine physician with 25+ years of clinical experience. Medical Director at Highland Primary Care. Earned MD from Tehran University of Medical Sciences; residency at Abington Memorial Hospital. Deep expertise in preventive care, chronic disease management, and men’s health.

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Diane R. Keahey, DNP, FNP-BC — Doctor of Nursing Practice & Family Nurse Practitioner

Diane R. Keahey, DNP, FNP-BC

Doctor of Nursing Practice & Family Nurse Practitioner

  • Family Medicine
  • Primary Care
  • Women's Health
  • Geriatric Care

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.

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Dr. Amit Warke, MD — Board-Certified Family Medicine Physician

Dr. Amit Warke, MD

Board-Certified Family Medicine Physician

  • Family Medicine
  • Primary Care
  • Preventive Medicine
  • Chronic Disease Mgmt

Board-certified Family Medicine physician with 15+ years caring for patients of all ages. MD from Maharashtra Institute of Medical Education and Research, Pune; residency at LSU Health (EA Conway Medical Center). Thorough, compassionate approach to acute and chronic conditions.

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Ready to schedule your visit?

We're accepting new patients. Call us or book online — it takes less than a minute.

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