JOHN MELLAS (MD) – Nephrology Physician, NPI 1497712079
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
319 NEPHROLOGY in MO
Provider Addresses for JOHN MELLAS (MD)
450 N New Ballas Rd Ste 204
Saint Louis, MO 631416836
Phone: (314) 991-0137
Fax: (314) 991-0603
Type: Location
1011 BOWLES AVE STE 220
FENTON, MO 630262384
Phone: (636) 681-3030
Fax: (636) 326-1545
Type: Mailing
10004, Kennerly Road, Concord, Saint Louis County, Missouri, 63128, United States
STE 374B
ST LOUIS, MO 63128
Phone: (314) 842-9669
Fax: (314) 842-1017
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2010-01-16
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20100116000292 | I | Nephrology | MO | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | 310 | 45 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 182 | 81 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 80 | 45 | $0 |
| 90937 | Hemodialysis procedure requiring repeated evaluation | 52 | 25 | $0 |
| 90935 | Hemodialysis procedure with physician evaluation | 45 | 16 | $0 |
Insurance plans in this area (ZIP 63141)
Loading plans...
Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| NEPHROLOGY | MO | 90961 | Dialysis services (2-3 physician visits per month), patient 20 years of age and older | 54 | 17 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nephrology, Internal Medicine | MO | |
| Nephrology, Internal Medicine | MO | |
| Nephrology, Internal Medicine | MO | |
| N E P H R O L O G Y | MO | |
| Nurse Practitioner | MO | |
| Nephrology, Internal Medicine | MO |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.