Dr. L Warren, MD

Dr. L Warren, MD

Family Medicine  ·  
Male  ·  
Age 64
Dr. L Warren, MD is a family medicine specialist in Belvidere, IL and has been practicing for 36 years. He graduated from University Of Illinois At Chicago / College Of Medicine in 1979 and specializes in family medicine.

205 Cadillac Ct Ste 6

Belvidere, IL 61008

Contact Information

(815) 544-0444

Insurance Accepted

  • Blue Cross Blue Shield of Illinois
  • Cigna
  • Coventry Health Care
  • First Health (Coventry Health Care)
  • Humana
  • UnitedHealthCare

*Please verify this information when scheduling an appointment.

Learn about Dr. Warren

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Dr. Warren's Experience

Dr. Warren's experience matches your search based on the following criteria:
  • Based on total number of patients treated over the last 12 months
  • Specializes in Family Medicine
  • Board certified in Family Practice
  • No malpractice claims found
  • No sanctions found
  • No board actions found

1  Specialties

  • Family Medicine

1  Board Certifications

  • Family Practice
    Accredited by: American Board of Medical Specialties*

131  Conditions Treated

Read Less

17  Procedures

  • Advance Directive End of Life Planning
  • Anemia and Iron Deficiency Screening
  • Arterial Blood Gas Test (ABG)
  • Cardiovascular Stress Test
  • Cholesterol Screening
  • Diabetes Screening
  • Electrocardiogram (EKG)
  • Fecal Occult Blood Test for Colorectal Cancer
  • Liver Function Test
  • Osteoporosis Screening
  • Prostate Cancer Screening
  • Pulmonary Function Test
  • Rapid Flu Test
  • Sexually Transmitted Infections Screening
  • Syphilis Screening
  • Thyroid Screening
  • Wellness Examination

Background Check

0 Malpractice Claims

No malpractice history found for Illinois.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • University Of Illinois At Chicago / College Of Medicine
    Medical School | Graduated 1979
  • Luth Genl Hosp
    Internship Hospital | Completed 1980
  • Luth Genl Hosp
    Residency Hospital | Completed 1982

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Warren has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. Warren does not have any memberships or affiliations listed. If you are Dr. Warren and would like to add memberships or affiliations, please update your profile.

Dr. Warren's Reviews

Likelihood to recommend Dr. Warren


Based on 15 reviews

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Average Wait Time
  • 10 – 15 minutes
Dr. Warren's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
What People Say About Dr. L Warren, MD
This is not about my experience woth dr warren but the multiple times he has disrespected my grandfather and ignored any signs or symptoms my grandpa has told him, dr warren siple says nothing is wrong. In fact he told my grandfather, a veteran, when he came in for an injury on his arm that...Read More
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Rockford, IL – Aug 06, 2017
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Horrible, this guy should RETIRE. His pre-historic way of practicing have been long a go.
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Chicago, IL – Mar 11, 2017
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Mis-diagnosed kidney stones as a UTI, ended up in ER twice as a result. Refused to treat me and told me I needed to see an Obgyn. Dead wrong,if it were not for an ER doctor recognizing the symptoms and ordering a CT scan who knows what would have happened. Extremely RUDE secretary, have to beg to...Read More
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Belvidere – Dec 21, 2015
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