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 guidelines. 

We regret we are not currently contracted with Medi-Cal (Gold Coast HMO)

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 try to work with the referring doctor to meet their expedited needs.  All patients must have a primary care doctor who has run the appropriate screening tests required to ensure a referral to an endocrinologist is appropriate.

The office of Tricia Westhoff-Pankratz, M.D. with certified nurse practitioners Barbara Holdsworth, FNP-C, BC-ADM and Marki Meyer, FNP-C


Medical practice specializing in Endocrinolgy in

Ventura County since 2002



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

Health Insurance


(805) 259-1356

​​Loma Vista Endocrinology 

Appointment Request

Specialists in Endocrine Disorders and Diabetes​


We specialize in endocrine diseases such as:


-Diabetes type 1 and other autoimmune diabetes 

-Diabetes type II that is uncontrolled or complicated 

-Hypoglycemia 

-Thyroid cancer

-Hyper- and Hypothyroidism

-Thyroid nodules/biopsies

​-Thyroid goiter

-Pituitary disorders

-Parathyroid disorders

-Gender affirmation hormone therapy

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

-PCOS

-Pediatric diabetes and thyroid disorders