Oasis Medical Group
Same-Day Appointments Available

Your Health.
Our Mission.

Physician-led primary care and addiction medicine in Vista, North County San Diego.

Call 760-691-1901 Book Appointment
Vista, CA
Mon–Fri 8am–5pm
Accepting All Insurances
Except Medi-Cal · Cash-pay options also available
Aetna Anthem Blue Cross Blue Shield Cigna United Healthcare Tricare Medicare PPO Plans
What we offer

Comprehensive care, one trusted clinic

Internal & Primary Care

Annual exams, chronic disease, walk-ins welcome.

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MAT / Suboxone

Same-day, private, judgment-free addiction care.

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Psychiatry & Behavioral

Mental health, TMS, Ketamine, psychotherapy.

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Wellness & Longevity

TRT/HRT, peptides, PRP, red light therapy.

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Pain Management

PRP and Decadron injections in-office.

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Urgent Care

Same-day sick visits. Walk-ins welcome.

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Dr. Kareem Moasis, MD — Internal Medicine physician in Vista, CA
Meet your physician

Dr. Kareem Moasis, MD

Board-certified in Internal Medicine and specializing in Addiction Medicine, Dr. Moasis founded Oasis Medical Group to deliver compassionate, evidence-based care in a private, judgment-free setting.

Serving patients across Vista and North County San Diego with same-day access, transparent pricing, and a personalized approach that puts you first.

About Our Practice

What our patients say

5.0 average · 74+ Google reviews

"We had the most incredible experience with Dr Moasis. I've never met anybody so kind and considerate and professional — so grateful to be in his practice."

anthony frescura
Google Review · 3 weeks ago

"Dr. Moasis is truly a blessing. I recently moved to San Marcos and needed a PCP closer to home. Dr. Moasis truly cares for his patients and is amazing at explaining things in a way that is easy to understand. Definitely recommend!!"

Nick Gonzales
Google Review · 2 months ago

"AMAZING DOCTOR! He's very attentive and carries great energy to the conversation."

Alejandro Cobian
Google Review · a month ago

"So attentive and patient! :)"

Tiana DeMarco
Google Review · a week ago
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FAQ

Frequently asked questions

Answers to what patients ask us most.

Yes — we offer same-day appointments for primary care, sick visits, and addiction medicine intakes whenever our schedule allows. Walk-ins are also welcome. Call 760-691-1901 to confirm availability.
We accept all major insurance plans — including Aetna, Anthem Blue Cross, Blue Shield, Cigna, United Healthcare, Tricare, Medicare and most PPO plans. The only exception is Medi-Cal, which we do not accept. Affordable cash-pay options are also available.
Absolutely. All addiction medicine care at Oasis Medical Group is private, discreet, and judgment-free. Your medical information is protected under HIPAA, and we treat every patient with dignity.
Most patients can be evaluated and started on Suboxone the same day they call. Dr. Moasis is a board-certified addiction medicine physician and can prescribe immediately when appropriate.
No referral is needed. You can call 760-691-1901 or use our contact form to schedule directly.
We're located at 906 Sycamore Ave, Suite 201, Vista, CA 92081 — conveniently serving Vista, Oceanside, Carlsbad, San Marcos, and all of North County San Diego.
Internal & primary care, urgent care, MAT/Suboxone, mental & behavioral health, TMS and ketamine therapy, TRT/HRT, peptide therapy, PRP, red light therapy, and pain management — all under one roof.

Still have questions?

Call 760-691-1901

Ready to feel better?

Call us today or book online. Same-day appointments available.

Call 760-691-1901Book Appointment