We accept Medicare and almost all commercial PPO and HMO insurance plans. HMO plans do require authorization prior to scheduling an initial appointment per HMO requirements. We regret we are not currently contracted with Medi-Cal plans.

Due to the small number of practicing endocrinologists in the area and the large patient need, we appreciate your patience in scheduling non-urgent appointments at least 3 months in advance.  For urgent appointments, we will work with the referring doctor to meet their expedited needs.  All patients must have a primary care doctor.

(805) 259-1356

​​Loma Vista Endocrinology 

Health Insurance

The office of Dr. Tricia Westhoff-Pankratz with certified nurse practitioner Barbara Holdsworth, FNP-c

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Loma Vista Endocrinology practices evidence-based medicine.  We do not prescribe homeopathic treatments, herbal therapies, or compounded hormones.  We do require a doctor's referral and medical records prior to scheduling an initial appointment.

Specialists in endocrine disorders and diabetes​

Loma Vista Endocrinology

2629 Loma Vista Road, Ventura, CA, 93003

Ph (805) 259-1356

Fax (805) 643-0720


We specialize in endocrine diseases such as:

-Diabetes type I and II

-Thyroid cancer

-Hyper- and Hypothyroidism

-Thyroid nodules

-Pituitary disease

-Parathyroid disease


-Adrenal diseases such as Addison's, Cushing's, and adrenal masses


​-Pediatric diabetes and thyroid conditions