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Greetings from the office of Dr. Ulin Sargeant! With over 12 years experience in Internal Medicine, I specialize in chronic disease detection and management such as for Diabetes Mellitus, Hypertension, and Heart Disease as well as preventive care in adults age 18 and older including the elderly. My practice is unique in that I take time with my patients to carefully design a well thought out care plan and treatment regimen no matter how many pre-existing conditions they may have. It is my goal to keep all of my patients in the very best health they can achieve while providing empathetic, caring evidence-based medicine. I was educated in traditional medicine at Temple University School of Medicine in Philadelphia, PA and was trained in Internal Medicine at Yale-New Haven Hospital in Connecticut. Before that, I received a Masters in Public Health from Boston University where I studied access to health care and health law. For my undergraduate degree, I studied Psychobiology and Philosophy at the University of Southern California (USC - Go Trojans!) undergrad. I speak Spanish and, therefore, welcome a wide spectrum of patients to my practice. I accept HMO, PPO, and Medicare.
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Explains conditions and treatments
Takes time to answer my questions
Provides follow-up as needed
Scheduling flexibility

Based on patient feedback. Read the reviews


Dr. Sargeant's Rating
11 Ratings with 1 Review
Patient Perspective
4.0 Explains conditions and treatments
4.5 Takes time to answer my questions
4.5 Provides follow-up as needed
Office Rating
Showing ratings for:
1227 Buena Vista St Ste F, Duarte, CA, 91010
n/a Average office wait time
3.0 Office cleanliness
3.0 Courteous staff
4.0 Scheduling flexibility
Monrovia Internal Medicine And Primary Care
1227 Buena Vista St Ste F
Duarte, CA, 91010
Showing 1-1 of 1 review
"I really wanted to like this doctor, she sounded like what i was looking for and had ok reviews. Only "saw" her once, telephone visit. She was okay, but all her reviews made it seem like she was actually, caring, for lack of a better word. I felt my appointment rushed and very impersonal. Don't bother providing your insurance information in the intake form- they don't run it and send you the full bill. Also, don't try to leave messages for the billing department. Ms. Pacheco does not call back, tho front office staff says she is on top of stuff, she can't even change her voicemail greeting to say her name and over one week to return calls, does not seem to be on top of stuff. Several messages later, i finally got a hold of her, she did not call me back, i got lucky and she answered. I'm already annoyed at this place, so i'm nit picking now. but as soon as i was transferred, she had my info up, didn't verify anything (cuz who cars about HIPAA). very unprofessional, did not introduce herself, ...
was very short -"yes/no" type answers- basically standoff-ish and did not even answer my question. I understand our healthcare workers have gone thru the ringer this year, but so have patients trying to find medical care and feel comfortable with these new implementations. Very unprofessional, I would not recommend this facility to anyone. "
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  • March 17, 2021


Monrovia Internal Medicine And Primary Care
1227 Buena Vista St Ste F
Duarte, CA, 91010
  • Accepting New Patients
  • Medicare Accepted
  • Medicaid Accepted
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
Sat9:00 am - 3:00 pm
  • Accepting New Patients
  • Medicare Accepted
  • Medicaid Accepted
425 W Duarte Rd
Monrovia, CA, 91016


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Medical School
Lewis Katz School Of Medicine At Temple University
Graduated 2003
Yale New Haven Hospital


Please verify insurance information directly with your doctor's office as it may change frequently.
  • Blue Shield CA Local Access Plus HMO
  • BCBS Blue Card PPO
  • Health Net CA HMO SmartCare
  • Blue Cross CA Select HMO
  • CIGNA LocalPlus
  • Health Net CA HMO Whole Care Network
  • Blue Shield CA Access Plus HMO
  • Blue Cross CA Advantage PPO Preferred DirectAccess Plus
  • UHC SignatureValue Focus
  • Aetna Signature Administrators PPO
  • Health Net CA CommunityCare Network HMO
  • Blue Shield CA PPO
  • Blue Shield CA Access Plus Savenet
  • CIGNA Southern CA Value
  • Health Net CA PPO
  • UHC Choice Plus POS
  • Blue Cross CA California Care Large Group HMO
  • CIGNA Open Access Plus
  • UHC Options PPO
  • Aetna Managed Choice POS Open Access
  • Blue Shield CA Platinum Local Access + HMO 25
  • UHC West SignatureValue Alliance
  • UHC SignatureValue Flex1
  • UHC West SignatureValue HMO
  • UHC Navigate HMO
  • Aetna HMO
  • UHC West SignatureValue Advantage HMO Value Network
  • Molina Mrktplace CA
  • Blue Cross CA PPO Prudent Buyer Large Group
  • Aetna HMO Deductible Plan CA only
  • Blue Cross CA PPO Prudent Buyer Individual
  • Health Net CA HMO Employer Group
  • BC CA California Care Small Group HMO
  • Aetna Choice POS II
  • UHC Navigate POS
  • Blue Cross CA PPO Prudent Buyer Small Group
  • Blue Cross CA Select Plus HMO
  • Blue Cross CA Priority Select HMO
  • LACare
  • Blue Shield CA Silver 70 PPO
  • BS CA Platinum 90 PPO
  • Blue Shield CA Bronze 60 PPO SHOP
  • Blue Shield CA Bronze Full PPO 4500
  • Blue Shield CA Platinum Access+ HMO 25
  • Aexcel PPO
  • Anthem Advantage HMO
  • AWH Southern CA HMO
  • Classic
  • Health Net CA HMO
  • Health Net CA HMO Excelcare
  • Health Net CA HMO Wholecare
  • Health Net SmartCare Network HMO Large Group
  • Health Net SmartCare Network HMO Small Group
  • UHC Nexus Open Access
  • UHC Signature Value Focus
  • UHC SignatureValue Alliance
  • UHC SV Flex Tier 3
  • Health Net EnhancedCare PPO Small Group
  • Aetna AWH Southern CA HMO
  • Aetna Elect Choice EPO Open Access
  • Aetna Innovation Health Aetna Premier Care Network Plus
  • Aetna Open Choice PPO
  • BCBS Pathway EPO
  • BCBSA Blue Card High Performance Network
  • Blue Cross CA Anthem Advantage HMO
  • Blue Cross CA California Care Small Group HMO
  • HealthNet ExcelCare Small / Large Group
  • HealthNet HMO CommunityCare I&F
  • HealthNet PPO EnhancedCare I&F
  • LA Care
  • Medica Choice With UHC
  • Molina Marketplace CA
  • Oscar Northern CA Cigna + Oscar LocalPlus
  • Oscar Northern CA Cigna + Oscar Open Access Plus
  • UHC SignatureValue Advantage HMO - CA
  • UHC SignatureValue HMO - CA
  • Oscar CA Cigna + Oscar LocalPlus
  • Oscar CA Cigna + Oscar Open Access Plus
  • Blue Cross CA Select PPO
  • Health Net CA Individual and Family PPO
  • Health Net PureCare HSP Individual and Family Plans
  • Cigna Southern CA Select
  • HealthNet HMO - Ambetter HMO IFP (CC1)
  • Blue Cross CA Anthem High Performance Network
  • Blue Cross CA Pathway EPO
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