Summary

Dr. Jonathan Kloss is an oncologist and internal medicine physician with 41 years of experience treating cancer patients and managing complex medical conditions. He earned his medical degree from Universidad Del Noreste Escuela De Medicina Dr Jose Sierra Flores and completed his residency at North Shore University Hospital. Dr. Kloss is fluent in both English and Spanish, allowing him to serve diverse patient populations.

Dr. Kloss practices at multiple locations in Cortland, New York, including Guthrie Cortland Medical Center and The Renzi Cancer Center. His hospital affiliations include Lourdes Hospital, Wilson Medical Center, and Guthrie Cortland Medical Center. He specializes in treating conditions such as coughing up blood and performs essential diagnostic procedures including iron level testing and complete blood counts. Patients have given Dr. Kloss an average rating of 3.1 out of 5 stars.

Overview based on verified provider data

Quick Facts

  • 3.1
  • 41 years of experience
  • speaks English, Spanish
  • North Shore University Hospital
  • 4 written reviews
  • 2 specialties
  • 13 areas of expertise
  • 3 hospital affiliations
  • 3 office locations
  • Male

Patients’ Perspective

  • Provided follow-up after the visit
  • Flexible scheduling

Office Locations

Dr. Jonathan David Kloss has 3 locations

The Renzi Cancer Center at Guthrie Cortland Medical Center

34 W Main StCortland, NY 13045

Dr. Jonathan David Kloss

34 Weat Main StCortland, NY 13045

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Dr. Jonathan David Kloss, MDDr. Jianming Ren, MDDr. Sally Soyoung Lee, MDDr. Nicole Lynn Gergen Villapiano, MD
OncologyAnesthesiologyNephrologyPediatrics
Accepts New Patients Accepts New Patients
3.1 
41 Years of Experience 43 Years of Experience 28 Years of Experience 15 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish Speaks English Speaks English, Spanish Speaks English, Vietnamese
Cortland , NYSyracuse , NYSayre , PAFolsom , CA
Med School: Universidad Del Noreste Escuela De Medicina Dr Jose Sierra Flores Med School: Zhongshan School Of Medicine Sun Yat-Sen University Med School: Univ Med Dent Of Nj Med School: University Of Minnesota Medical School
Current Profile
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Insurance Plans Accepted by Dr. Jonathan David Kloss

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Jonathan David Kloss has the following 2 specialties

Specialty Expertise

Dr. Jonathan David Kloss has the following 13 areas of expertise

  • Blood Cancer
  • Bone Marrow Transplant
  • Cancer
  • Chemotherapy
  • Chronic Myeloid Leukemia
  • Chronic Myelomonocytic Leukemia
  • Deep Vein Thrombosis
  • Hepatitis C
  • Internal Medicine
  • Leukemia
  • Lymphoma
  • Myelofibrosis
  • Myeloma

Certifications, License, & Education

41 Years Experience

Dr. Jonathan David Kloss holds an expired medical license in the state of New York.

Medical License

Medical Doctor with an expired medical license in the state of New York that expired in 2026.

Education & Training

Residency

Completed their residency at North Shore University Hospital.

Medical School

Graduated from Universidad Del Noreste Escuela De Medicina Dr Jose Sierra Flores in 1985.

NPI Number

Dr. Kloss' NPI number is 1134118565.

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Frequently Asked Questions

Does Dr. Jonathan Kloss accept my insurance?
You can see the insurance plans that Dr. Jonathan Kloss accepts on their Vitals profile.
Where is Dr. Jonathan Kloss's office located?
Dr. Jonathan Kloss's office is located at 134 Homer Ave, Cortland, NY, 13045.
What languages does Dr. Jonathan Kloss speak?
Dr. Jonathan Kloss speaks English and Spanish.
Is Dr. Jonathan Kloss accepting new patients?
Dr. Jonathan Kloss has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
Which hospitals is Dr. Jonathan Kloss affiliated with?
Dr. Jonathan Kloss is affiliated with Lourdes Hospital, Wilson Medical Center, and Guthrie Cortland Medical Center.

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