John Mellas, MD
NPI 1497712079 · Nephrology Physician · Fenton, MO
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mellas, MD is a Nephrology Physician provider in Fenton, MO (NPI 1497712079).
Provider details
- NPI number
- 1497712079
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- R3E73 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
455 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 235 | $331 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 67 | $76 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 55 | $71 |
| Hemodialysis Procedure Requiring Repeated Evaluation90937 | 44 | $98 |
| Transitional Care Management Services for Problem of High Complexity99496 | 30 | $268 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 24 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 61 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 201 | 48 |
| Sevelamer Carbonate | 194 | 45 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 151 | 21 |
| Alprazolam | 138 | 18 |
| Carvedilol | 111 | 26 |
| Furosemide | 83 | 25 |
| Calcium Acetate | 71 | 17 |
Practice location
Mailing address
Additional practice locations (1)
- 450 N New Ballas Rd Ste 204Saint Louis, MO 63141-6836Phone: (314) 991-0137Fax: (314) 991-0603
Registry dates
- Enumerated
- 2006-04-27
- Last updated
- 2023-12-20
- Certified
- 2023-12-20
Frequently asked questions
- What is John Mellas's NPI number?
- John Mellas's National Provider Identifier (NPI) is 1497712079, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mellas's specialty?
- John Mellas is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is John Mellas located?
- John Mellas's practice location on file with NPPES is 1011 Bowles Ave Ste 220, Fenton, MO 63026-2384.
- What is John Mellas's phone number?
- The practice phone number listed in the NPPES registry for John Mellas is (636) 681-3030.
- Does John Mellas accept Medicare?
- John Mellas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mellas's NPI active?
- Yes — John Mellas's NPI (1497712079) is active in the NPPES registry as of the last update on 2023-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.