Summary

Dr. Gretes graduated from the Duke University School of Medicine in 1972. He works in Gloucester, VA and 1 other location and specializes in Nephrology and Internal Medicine. Dr. Gretes is affiliated with Riverside Walter Reed Hospital, Riverside Regional Medical Center and Sentara Careplex Hospital.

Quick Facts

  • 4.5
  • 54 years of experience
  • speaks English
  • University Of Virginia Health System
  • 5 written reviews
  • 2 specialties
  • 10 areas of expertise
  • 3 hospital affiliations
  • 2 office locations
  • Male

Patients’ Perspective

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

Office Locations

Dr. John Constantine Gretes has 2 locations

Riverside Urology Specialists Gloucester

7552 Hospital Dr Ste 302Gloucester, VA 23061
Mon8:00 am - 4:30 pm
Tue8:00 am - 4:30 pm
Wed8:00 am - 4:30 pm
Thu8:00 am - 4:30 pm
Fri8:00 am - 4:30 pm
SatClosed
SunClosed

Riverside Walter Reed Hospital

7547 Medical DrGloucester, VA 23061

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Dr. John Constantine Gretes, MDDr. Robert Stephen Guerzon, MDDr. Raymond Wahome Gathiuni, MDDr. Jenny Lynn Andrus, MD
NephrologyAnesthesiologyAnesthesiologyPain Medicine
Accepts New Patients
4.5 
0 
4.4 
3.1 
54 Years of Experience 28 Years of Experience 24 Years of Experience 22 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English Speaks English, Spanish
Gloucester , VAElmendorf Afb , AKMartinsburg , WVNewport News , VA
Med School: Duke University School Of Medicine Med School: University Of South Alabama College Of Medicine Med School: Howard University College Of Medicine Med School: Eastern Virginia Medical School
Current Profile
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Insurance Plans Accepted by Dr. John Constantine Gretes

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

Medical Specialties

Dr. John Constantine Gretes has the following 2 specialties

Specialty Expertise

Dr. John Constantine Gretes has the following 10 areas of expertise

  • Acute Renal Failure (Acute Kidney Failure)
  • Chronic Kidney Disease (CKD)
  • Chronic Renal Disease
  • Dialysis
  • End Stage Renal Disease (ESRD)
  • Internal Medicine
  • Kidney Biopsy
  • Peritoneal Dialysis
  • Physical Rehabilitation
  • Urinalysis

Certifications, License, & Education

54 Years Experience

Dr. John Constantine Gretes holds an expired medical license in the state of Virginia.

Medical License

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

Education & Training

Residency

Completed their residency at University Of Virginia Health System.

Medical School

Graduated from Duke University School Of Medicine in 1972.

NPI Number

Dr. Gretes' NPI number is 1043248453.

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Frequently Asked Questions

Is Dr. John Gretes accepting new patients?
Dr. John Gretes has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
How can I make an appointment with Dr. John Gretes?
You can find contact information for Dr. John Gretes here on Vitals.
Where is Dr. John Gretes's office located?
Dr. John Gretes's office is located at 7552 Hospital Dr Ste 302, Gloucester, VA, 23061.
Does Dr. John Gretes accept virtual/telehealth appointments?
Dr. John Gretes has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Does Dr. John Gretes accept my insurance?
You can see the insurance plans that Dr. John Gretes accepts on their Vitals profile.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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