Summary

Dr. Ralph Defronzo specializes in internal medicine with advanced expertise in endocrinology, diabetes, and metabolism. He earned his medical degree from Harvard Medical School and completed his residency at Johns Hopkins Health System. With 57 years of experience in medicine, Dr. Defronzo brings extensive knowledge to treating complex metabolic and hormonal conditions. He provides care in English.

Dr. Defronzo practices at University Hospital in San Antonio, Texas. His clinical focus includes treating kidney disease and chronic kidney disease, including advanced stage 5 cases. He performs diagnostic procedures such as abdominal and kidney ultrasounds to help evaluate patient conditions. Patients have given him an average rating of 5.0 on Vitals.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 5
  • 57 years of experience
  • 30 insurance plans accepted
  • speaks English
  • Johns Hopkins Health System
  • 2 specialties
  • 11 areas of expertise
  • 3 board certifications
  • 1 hospital affiliation
  • 1 office location
  • Male

Office Location

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Ralph A. Defronzo, MDDr. Nilesh Vyas, MDDr. Tooba Rehman, MDDr. Krunal Talati, MD
Internal MedicineInternal MedicineInternal MedicineInternal Medicine
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.3 
57 Years of Experience 41 Years of Experience 16 Years of Experience 21 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English Speaks English Speaks English
San Antonio , TXWebster , TXKaty , TXWebster , TX
Med School: Harvard Medical School Med School: Baroda Medical College Med School: CHICAGO MEDICAL SCHOOL AT ROSALIND FRANKLIN UNIVERSITY OF MEDICINE & SCIENCE Med School: University of Baroda
Current Profile
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Insurance Plans Accepted by Ralph A. Defronzo

  • Accepts Medicare
  • Accepts Medicaid
  • 6 Degrees Transplant Network "
  • Aetna Better Health Childrens Health Insurance Program (CHIP) Perinate Newborn"
  • Aetna Better Health Childrens Health Insurance Program (CHIP)" "
  • Aetna Better Health Medicaid STAR
  • Aetna Health Bexar County-ACO Plan (Baptist & HealthTexas) (Please Call)
  • Aetna Health Commercial - Choice POS II
  • Aetna Health Commercial - Elect Choice EPO
  • Aetna Health Commercial - Exchange (Silver/Gold HMO)
  • Aetna Health Commercial - HMO
  • Aetna Health Commercial - Managed Choice POS
  • Aetna Health Commercial - Open Choice PPO (Non-Methodist/HCA)
  • Aetna Health Commercial - QPOS
  • Aetna Health Commercial - Select
  • Aetna Health Commercial - Whole Health EPO (Please Call)
  • Aetna Health Medicare Advantage - Eagle PPO
  • Aetna Health Medicare Advantage - Freedom PPO
  • Aetna Health Medicare Advantage - Premier HMO
  • Aetna Health Medicare Advantage - Prime HMO
  • Aetna Health Medicare Advantage - Value Plus PPO
  • Aetna Health Medicare-Medicaid Dual Preferred (HMO D-SNP)
  • Allwell (Superior HealthPlan) Medicare Advantage - All Products
  • BlueCross BlueShield - Federal Programs Commercial - Federal - All Products
  • BlueCross BlueShield - Out-of-State Commercial - Out-of-State - Blue Card Program Only "
  • BlueCross BlueShield of Texas (BCBSTX) Childrens Health Insurance Plan (CHIP)"
  • BlueCross BlueShield of Texas (BCBSTX) Commercial - HMO - Blue Advantage
  • BlueCross BlueShield of Texas (BCBSTX) Commercial - HMO - Blue Essentials
  • BlueCross BlueShield of Texas (BCBSTX) Commercial - HMO - Blue Premier
  • BlueCross BlueShield of Texas (BCBSTX) Commercial - PPO - Blue Choice
  • BlueCross BlueShield of Texas (BCBSTX) Commercial - PPO (CHRISTUS Health)
  • BlueCross BlueShield of Texas (BCBSTX) HPN/EPO (Narrow Network)

Medical Specialties

Ralph A. Defronzo has the following 2 specialties

Specialty Expertise

Ralph A. Defronzo has the following 11 areas of expertise

  • Acromegaly
  • Addison Disease
  • Cushing Disease
  • Diabetes
  • Endocrinology & Metabolism
  • Fatigue
  • Gland Issues
  • Hormones
  • Hyperthyroidism
  • Hypopituitarism
  • Hypothyroidism

Certifications, License, & Education

57 Years Experience

Ralph A. Defronzo holds an active medical license in the state of Texas.

Medical License

Medical Doctor with an active medical license in the state of Texas that expires in 2027.

Education & Training

Residency

Completed their residency at Johns Hopkins Health System.

Medical School

Graduated from Harvard Medical School in 1969.

NPI Number

Ralph A. Defronzo's NPI number is 1851408843.

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Frequently Asked Questions

Is Ralph A. Defronzo accepting new patients?
Ralph A. Defronzo is accepting new patients on Vitals. View Ralph A. Defronzo's profile on Vitals to make an appointment.
Does Ralph A. Defronzo accept my insurance?
You can see the insurance plans that Ralph A. Defronzo accepts on their Vitals profile.
Does Ralph A. Defronzo accept virtual/telehealth appointments?
Ralph A. Defronzo has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Which hospitals is Ralph A. Defronzo affiliated with?
Ralph A. Defronzo is affiliated with University Hospital.
Where is Ralph A. Defronzo's office located?
Ralph A. Defronzo's office is located at 4502 Medical Dr, San Antonio, TX, 78229.

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