Primary care doctors
Internal Medicine • West Covina, CA • multiple locations in San Gabriel Valley locations
Clinic Type
Internal Medicine
Address
440 W. Foothill Blvd., Glendora, CA 91741; 1125 Via Verde, San Dimas, CA 91773; 1135 S. Sunset Ave., Suite 401, West Covina, CA 91790; 315 N Third Ave #207, Covina, CA 91723
Phone
626.963.9402
cancer@emanatehealth.org
Opening Hours
Not published — contact the clinic to confirm hours.
Services Offered
Insurance & Payment
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Languages Spoken
Photos

What Patients Say
Overall sentiment across review platforms: mixed
- Birdeye: 2.8/5 (16)
- Healthgrades: 3.7/5 (9)
- WebMD Care: 5.0/5 (17)
- WebMD Care: 4.5/5 (27)
Patients praise
- doctors described as thorough, knowledgeable, and empathetic
- efficient and helpful staff experiences reported for some offices
- availability of multilingual providers (Spanish, Chinese, Tagalog)
- comprehensive care for chronic conditions like diabetes and hypertension
Common complaints
- rude, short-tempered, or unprofessional office staff
- long wait times and difficulty with appointments
- perceived lack of thoroughness or empathy in some doctors
- concerns about administrative processes like prescription renewals
"Dr. Koumas is sweet and attentive. Unfortunately, his intake clerks... are short tempered and rude."
— Birdeye"unprofessional doctor with rude staffs, you will definitely regret"
— Healthgrades"Dr. Kwok gave me a physical, listened to all my issues, prescribed medicine, gave me a referral and before I left the office I had an appointment with a specialist. He was very knowledgeable and I was very impressed."
— VitalsSynthesized from public review platforms as of Jul 10, 2026 — sources: [1][2][3][4].
In the News
- Dr. John Quiamas, DO - Family Medicine Doctor in West Covina, CA — May 14, 2026
- Dr. Lina Dela Cruz, MD - Internist in West Covina, CA | Healthgrades — Apr 7, 2026
- Dr. Teresita Belen Y. Gan, MD - Internal Medicine Physician in West Covina, CA — May 14, 2026
- Lilia E. Vazquez, PA - Physician Assistant in West Covina, CA — May 14, 2026
- Jane T. Herico, NP - Nurse Practitioner in West Covina, CA — May 14, 2026
Information sourced from the clinic's website as of July 10, 2026.
More internal medicine clinics in West Covina
Summary for Mayflower Medical Group Covina CA: Home West Covina - What it is: Mayflower Medical Group is a medical practice network offering family medicine, pediatric care, and urgent care in Southern California. - Location: Headquarters and primary offices in West Covina, CA, with additional Covina locations (main address: 140 N Orange Ave, West Covina, CA 91790; also 1433 N Hollenbeck Ave, Covina, CA 91722). - Focus: Family medicine, pediatric care, urgent care services. - Size & ownership: Private medical practice with a small workforce (about 9 employees) and annual revenue in the US$1–5 million range. - Contact: Main line (626) 331-2209. - Web presence: Website mayflowermedicalgroup.com; active but with modest traffic and a low employer rating based on available reviews. - Notes: The company has a presence in both the United States (primarily California) and the United Kingdom in the workforce data; verify local office hours and services directly, as details on specific clinics in Covina/West Covina are limited in the extracted highlights.
West Covina Family Medical Center and Urgent Care, led by Armen Nercessian, D.O., is a small medical practice located in West Covina, CA, offering both urgent care and family medicine services. Key points: - Services: Urgent care, preventive and family medical care for residents of West Covina, La Puente, Baldwin Park and nearby communities. - Locations: Two offices (both listed at 2425 S Azusa Ave, West Covina, CA 91792). - Contact: Phone 626-839-9111; Email westcovinafamilymedical@gmail.com; Website westcovinafamilymedical.com. - Overview: Describes itself as a family doctor, urgent care center, medical clinic serving families with both urgent and routine care. - Online presence: Moderate monthly site traffic with a high bounce rate and average 2.9 pages per visit; primary audience based in the United States.
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