Meet the people behind your care.

Sigma is small on purpose. You'll know exactly who you're working with. Choose a clinician below to read their full background and approach.

Dr. Ramy Elsawah, founder and psychiatrist

Dr. Ramy Elsawah

Founder · Licensed Psychiatrist (CA & NJ)

Child, adolescent, and adult psychiatry. Dr. Ramy founded Sigma to give patients unhurried time, honest answers, and follow-through. He sees patients in California and New Jersey.

Read Dr. Ramy’s full bio

Katherine Halpern, PMHNP-BC

Board-Certified Psychiatric Nurse Practitioner (NJ)

More than a decade of nursing experience, from pediatric critical care to psychiatry. Katherine sees New Jersey patients by telehealth with thoughtful, individualized care.

Read Katherine’s full bio

In California, you're seen by Dr. Ramy. In New Jersey, most adults are seen by Katherine; children and adolescents under eighteen, and adults who need medication-assisted treatment (MAT) for alcohol or opioid use, are seen by Dr. Ramy. We confirm the details on your intake call.

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Ready when you are.

Book a consultation or ask anything on a free 15-minute intro call. Honest answers, no pressure.

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