DR. NICHOLAS JOHN MAYER (D.O.) – Nephrology Physician, NPI 1104075597
Nephrology Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
4,186 INTERNAL MEDICINE in MO
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Provider Addresses for DR. NICHOLAS JOHN MAYER (D.O.)
11155, Dunn Road, Saint Louis County, Missouri, 63136, United States
SUITE 211N
SAINT LOUIS, MO 631366150
Phone: (314) 741-1600
Fax: (314) 741-1677
Type: Location
2044 Madison Ave Ste 15
Granite City, IL 620404641
Phone: (314) 741-1600
Fax: (314) 741-1677
Type: Location
1265 GRAHAM RD STE 1
FLORISSANT, MO 630318018
Phone: (314) 741-1600
Fax: (314) 741-1677
Type: Location
Dunn Road, Riverview, Spanish Lake, Saint Louis County, Missouri, 63138, United States
SAINT LOUIS, MO 631366166
Phone: (314) 741-1600
Fax: (314) 741-1677
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 22 Open Payments records for all available years, with a total value of $1,089.
Total Amount is formed as General ($1,089) + Research ($0) + Ownership ($0) = $1,089.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Fresenius USA Marketing, Inc. ($315).
Total Amount
$1,089
General + Research + Ownership
Payments
22
Total payment records
General Amount
$1,089
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Fresenius USA Marketing, Inc. | $315 |
| NxStage Medical, Inc. | $221 |
| Otsuka America Pharmaceutical, Inc. | $143 |
| Phathom Pharmaceuticals, Inc. | $125 |
| ABBVIE INC. | $114 |
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: 2009-09-28
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20090810000242 | I | Internal Medicine | MO | TBD |
| I20090928000358 | I | Internal Medicine | IL | 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 |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 253 | 125 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 177 | 65 | $0 |
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | 154 | 41 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 153 | 45 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 64 | 47 | $0 |
Insurance plans in this area (ZIP 63136)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | MO | |
| Nurse Practitioner | MO | |
| Internal Medicine, Nephrology | AL | |
| Nephrology, Internal Medicine | MO | |
| Internal Medicine, Nephrology | MO | |
| Internal Medicine, Nephrology, Nephrology, Internal Medicine | IL |
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