Dr. Xiaoxi Ouyang, MD

Concierge Internal Medicine physician, Nashua, NH

Serenity Primary Care and Medical Weight Loss Clinic

Dr. Ouyang founded Serenity Primary Care and Medical Weight Loss Clinic.

154 Broad Street, Suite 1510, Nashua, NH 03063

At a glance

Practice model

Hybrid: insurance plus monthly membership

Primary care membership

$40 a month

Board certification

Internal Medicine and Obesity Medicine

Languages

English, Mandarin, French

Telehealth

Offered

Facts on this page last checked October 2026. How we check doctors

About Dr. Ouyang

Dr. Ouyang earned her Doctor of Medicine from McGill University in Montreal. She completed a Diploma of Collegial Studies at Marianopolis College in Montreal. She finished her internal medicine residency at Yale University School of Medicine and Greenwich Hospital in Greenwich, Connecticut.

She founded and manages Serenity Primary Care and Medical Weight Loss Clinic. Her special interests include medical weight loss. Her patients are adults from southern New Hampshire and northern Massachusetts.

The practice combines traditional insurance with a monthly membership. Members can text Dr. Ouyang directly and get quick answers and longer appointments. Dr. Ouyang speaks English, Mandarin and French.

The practice also offers telehealth.

Membership and fees

Membership at Serenity Primary Care and Medical Weight Loss Clinic is $40 a month, and an additional adult in the same household pays $30 a month.

Self-pay patients pay $99 a month for membership.

The 3-Month Medical Weight Loss Program costs $159 a month and lasts 3 months.

Fees vary by plan. Ask the practice.

Services

Primary care Medical weight loss Weight management Adult care

What internal medicine doctors commonly treat

Education and credentials

Degree

College

Marianopolis College (Diploma of Collegial Studies)

Medical school

McGill University

Residency

Internal Medicine, Yale University School of Medicine / Greenwich Hospital

Board certification

Internal Medicine and Obesity Medicine

License

New Hampshire Verify with the New Hampshire Board of Medicine

NPI

1649479064

Hospital and practice affiliations

Founder, Serenity Primary Care and Medical Weight Loss Clinic

Location

154 Broad Street, Suite 1510, Nashua, NH 03063

Serenity Primary Care and Medical Weight Loss Clinic practice page

Directions

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Questions patients ask

Does Dr. Ouyang take insurance, or offer a membership?

The practice combines traditional insurance with a monthly membership. Members get direct access to Dr. Ouyang by text, quick answers and extended appointments.

How much does a membership at Serenity Primary Care and Medical Weight Loss Clinic cost?

Primary care membership is $40 a month, and an additional adult in the same household pays $30 a month. Self-pay patients pay $99 a month for membership. The 3-Month Medical Weight Loss Program costs $159 a month for 3 months.

Is Dr. Ouyang board certified?

Dr. Ouyang is board certified in both Internal Medicine and Obesity Medicine.

Where did Dr. Ouyang train?

She earned a Doctor of Medicine from McGill University in Montreal. She completed her internal medicine residency at Yale University School of Medicine and Greenwich Hospital in Greenwich, Connecticut.