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How to Contact Us

If you are considering weight-loss surgery, you will want to educate yourself on these life-changing procedures. The staff at the St. Joseph Hospital Bariatric Care Center are here to answer all of your questions and to determine whether you are a candidate for weight loss surgery. Just give us a call at 714-771-8298, or you can contact specific staff members as noted below.

Sami Hamamji, M.D.
714-541-5959
714-835-9550 fax

Jeffrey Johnsrud, M.D.
714-541-4442
714-571-5911 fax

Heidi Daniel, R.N.
714-771-8298
714-771-8239 fax

Geoffrey Phillips, M.D.
714-453-0688
714-453-0689 fax

Eric Pham, M.D.
714-541-4343
714-571-5911 fax

Natalie Buntzen, M.S., R.D.
714-771-8000 ext. 12972
714-771-8239 fax

Siham (Sue) Arevalo, Exercise Physiologist
714-612-5920

Mary Nell Jeffries, P.T.
714-771-8204

Shirley Hartshorn
714-771-8298