John Mellas, MD
Nephrology Physician · Fenton, MO
John Mellas, MD is a nephrology physician with a practice address in Fenton, Missouri, and NPI 1497712079, issued on Apr 27, 2006. Check the license (Missouri R3E73, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- John Mellas
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- R3E73 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1011 Bowles Ave Ste 220, Fenton, MO 63026
- Phone
- (636) 681-3030
- Enumerated
- Apr 27, 2006
- Record last updated
- Dec 20, 2023
- Fax
- (636) 326-1545
- Medicaid ID
- 202250106 MO
- Medicare enrollment
- Enrolled (PECOS I20100116000292); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1977
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 285 in Missouri → Look up another NPI →
Also registered at 1011 Bowles Ave Ste 220
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohammed Abbas, M.D.Vascular & Interventional Radiology Physician1306057310
Verify John Mellas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license R3E73Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% more Medicare Part D claims than the average nephrology physician in 2024
2,749 Medicare Part D claims for 206 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 227 claims were for opioids.
Most prescribed
- Amlodipine Besylate201 claims
- Sevelamer Carbonate194 claims
- Oxycodone-Acetaminophen151 claims
- Alprazolam138 claims
- Carvedilol111 claims
- Furosemide83 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Nephrology And Hypertension Specialists LLCSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Mellas among 285 nephrology physician records in Missouri
John Mellas, MD is one of 285 nephrology physician records with a practice address in Missouri. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 48% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1977 · median 2000 among the 212 with a school on file
- Record last updated2023 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Missouri
There are 285 nephrology physician records in Missouri.
All 285 in Missouri → Every provider in Fenton → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Ana Stark, MDFestus, MO 630281811188758
- Sarah Sundet, D.O., MBAFestus, MO 630281316186836
- Christopher Abeid, M.D.Florissant, MO 630311205020666
- Felicia Bentley, MDFlorissant, MO 630311154393437
- Sameed Lodhi, MDFlorissant, MO 630311356827182
- Nicholas Mayer, D.O.Florissant, MO 630311104075597
- Donovan Polack, MDFlorissant, MO 630311659324465
- Svetha Chunduri, M.D.Chesterfield, MO 630171033346838
Common questions
What is John Mellas, MD's NPI number?
John Mellas, MD's National Provider Identifier (NPI) is 1497712079, issued on Apr 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Mellas, MD located?
The NPPES record lists a practice address at 1011 Bowles Ave Ste 220, Fenton, MO, 63026. Phone: (636) 681-3030. Providers update this record themselves, so call before visiting.
How can I verify John Mellas, MD's license?
NPPES lists Missouri license number R3E73, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Mellas, MD prescribe under Medicare Part D?
In 2024, John Mellas, MD had 2,749 Medicare Part D claims for 206 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.