Summary

Dr. Jonathan Horstmann is a family medicine physician with nearly five decades of medical experience serving patients in the San Bernardino and Redlands areas. He earned his medical degree from Washington University in St. Louis School of Medicine and completed his residency training at Scripps Mercy Hospital. With 49 years of dedicated practice, Dr. Horstmann brings extensive knowledge and skill to comprehensive family care. He is fluent in both English and Spanish, allowing him to serve diverse communities throughout the region.

Dr. Horstmann is affiliated with Redlands Community Hospital and practices at multiple locations in San Bernardino and Redlands, California. His long-standing commitment to the community includes work at the Lestonnac Free Clinic, demonstrating his dedication to providing care for underserved populations. Patients consistently recognize his excellent care, rating him 4.6 out of 5 stars on Vitals. His extensive experience in family medicine allows him to provide comprehensive healthcare for patients of all ages, from routine wellness visits to managing chronic conditions.
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Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.6
  • 49 years of experience
  • 8 insurance plans accepted
  • speaks English, Spanish
  • Scripps Mercy Hospital
  • 3 written reviews
  • 1 specialty
  • 6 areas of expertise
  • 1 hospital affiliation
  • 4 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Jonathan William Horstmann has 4 locations

Lestonnac Free Clinic

1890 N Waterman AveSan Bernardino, CA 92404
Mon9:00 am - 5:00 pm
Tue9:00 am - 5:00 pm
WedClosed
Thu12:00 pm - 7:00 pm
Fri12:00 pm - 7:00 pm
Sat9:00 am - 5:00 pm
SunClosed

Dr. Jonathan William Horstmann

2 W Fern AveRedlands, CA 92373

Community Hospital Of San Bernardino

1805 Medical Center DrSan Bernardino, CA 92411

Saint Bernardine Medical Center

2101 N Waterman AveSan Bernardino, CA 92404

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Dr. Jonathan William Horstmann, MDDr. Michelle Simi, MDReanna Lynn Clayton MSN, FNP-CDr. David Byron, MD
Family MedicineFamily MedicineFamily MedicineFamily Medicine
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.6 
4.3 
49 Years of Experience 32 Years of Experience 16 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English, Spanish Speaks English
San Bernardino , CAOrinda , CATempleton , CATuscon , AZ
Med School: Washington University In St Louis School Of Medicine Med School: University Of Chicago Division Of The Biological Sciences The Pritzker School Of Medicine Med School: Ben-Gurion University Of The Negev Faculty Of Health Sciences
Current Profile
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Insurance Plans Accepted by Dr. Jonathan William Horstmann

  • Accepts Medicare
  • Accepts Medicaid
  • Aetna
  • Anthem Blue Cross
  • BLUE CROSS of CALIFORNIA
  • Blue Shield of California
  • Blue Shield of California - HMO
  • Health Net - HMO
  • Medicare - Medicare
  • UnitedHealthcare - HMO

Medical Specialties

Dr. Jonathan William Horstmann has the following specialty

Specialty Expertise

Dr. Jonathan William Horstmann has the following 6 areas of expertise

  • Check-up
  • Contraception
  • Family Planning
  • Immunization
  • Influenza
  • Weight Loss

Certifications, License, & Education

49 Years Experience

Dr. Jonathan William Horstmann holds an active medical license in the state of California.

Medical License

Medical Doctor with an active medical license in the state of California that expires in 2026.

Education & Training

Residency

Completed their residency at Scripps Mercy Hospital.

Medical School

Graduated from Washington University In St Louis School Of Medicine in 1977.

NPI Number

Dr. Horstmann's NPI number is 1699715953.

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Frequently Asked Questions

Where is Dr. Jonathan Horstmann's office located?
Dr. Jonathan Horstmann's office is located at 1890 N Waterman Ave, San Bernardino, CA, 92404.
Does Dr. Jonathan Horstmann accept my insurance?
You can see the insurance plans that Dr. Jonathan Horstmann accepts on their Vitals profile.
What languages does Dr. Jonathan Horstmann speak?
Dr. Jonathan Horstmann speaks English and Spanish.
Is Dr. Jonathan Horstmann accepting new patients?
Dr. Jonathan Horstmann is accepting new patients on Vitals. View Dr. Jonathan Horstmann's profile on Vitals to make an appointment.
Which hospitals is Dr. Jonathan Horstmann affiliated with?
Dr. Jonathan Horstmann is affiliated with Redlands Community Hospital.

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