Services
Thyroid and hormone services in Diamond Bar, California
Comprehensive, whole-person thyroid and hormone care — complete testing, medication optimization, hormone support, and long-term monitoring, delivered by one physician who sees the whole picture.
Our care
What we provide
Every service starts from the same place: a complete picture of your thyroid, hormones, and metabolism, read against how you actually feel.
Advanced Thyroid Testing & Evaluation
A complete panel — TSH, Free T3, Free T4, Reverse T3, and antibodies — not TSH alone.
Learn moreHormone Optimization & Imbalance Management
Targeted hormone assessment and a personalized plan for fatigue, mood, weight, and low energy.
Learn moreThyroid Medication Optimization
For patients who are treated with T4 alone and still do not feel well.
Learn moreWeight Management for Thyroid Health
Metabolic health, nutrient deficiencies, and thyroid treatment addressed together.
Learn moreHigh-Dose Vitamin D Therapy
A supervised vitamin D protocol within comprehensive thyroid and immune support.
Learn moreIntegrative Care & Ongoing Monitoring
Regular follow-up, medication refinement, and education that keeps treatment working.
Learn more7-Step Thyroid Rejuvenation Program
Dr. Shah's signature root-cause protocol for symptoms that persist despite normal labs.
Learn more
Answers
Questions about our services
- What thyroid services does the clinic offer in Diamond Bar?
- The clinic offers advanced thyroid testing with a complete panel, thyroid medication optimization including T3 and natural desiccated thyroid, hormone optimization, weight management for thyroid patients, high-dose vitamin D therapy, integrative care with ongoing monitoring, and the 7-Step Thyroid Rejuvenation Program.
- Do I need a referral to be seen?
- No referral is required. New patients are welcome, most insurance is accepted, and free consultations are available. Bring any recent labs and your current prescriptions to the first visit.
- Is Dr. Shah an endocrinologist?
- No. Dr. Hitendra H. Shah, MD is a physician and thyroid and hormone specialist with more than 40 years in practice who has treated over 5,000 patients using a functional, whole-person approach rather than hospital-employed endocrinology protocols.
- Which cities does the clinic serve?
- The clinic is in Diamond Bar, California, in Los Angeles County's San Gabriel Valley, and regularly sees patients from Chino Hills, Walnut, Rowland Heights, Brea, and Pomona.
Written and reviewed by Dr. Hitendra H. Shah, MD. Last updated: August 11, 2026.
Diamond Bar, California
Start with a complete thyroid evaluation
Request an appointment with Dr. Shah and start with a full picture of your thyroid and hormone health.