Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John Mellas, MD

Individual provider Nephrology Physician · NPI 1497712079

John Mellas, MD is a Nephrology in Fenton, Missouri. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 1977, 49 years ago. Practices with Nephrology and Hypertension Specialists LLC, a 7-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
49
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in
MO
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1011 Bowles Ave Ste 220
Fenton, MO 63026-2384
Phone: (636) 681-3030
Fax: (636) 326-1545
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 450 N New Ballas Rd Ste 204, Saint Louis, MO 63141-6836 — (314) 991-0137

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence R3E73 (MO)

Record details

NPI number1497712079
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 27, 2006
Last updated in NPPESDecember 20, 2023
Certification dateDecember 20, 2023
Mailing address1011 Bowles Ave Ste 220, Fenton, MO 63026-2384

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 1977 (49 years in practice)
Group practice Nephrology And Hypertension Specialists Llc — 7 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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