ROBERT STANISLAW NIZNIK (MD) – Nephrology Physician, NPI 1922447069
Nephrology Physician
Main info
Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
274 NEPHROLOGY in MN
Provider Addresses for ROBERT STANISLAW NIZNIK (MD)
Mayo Clinic 200 1st St SW
Rochester, MN 559050001
Phone: (507) 284-2511
Type: Location
410 BIRCHWOOD AVE STE 200
BELLINGHAM, WA 982251783
Phone: (360) 734-9233
Fax: (360) 738-8974
Type: Mailing
3104 SQUALICUM PKWY STE 101
BELLINGHAM, WA 982251941
Phone: (360) 734-9233
Fax: (360) 738-8974
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $3.
Total Amount is formed as General ($3) + Research ($0) + Ownership ($0) = $3.
Last reported payment date: 2023-11-06 • Largest payer in this snapshot: Travere Therapeutics, Inc. ($3).
Total Amount
$3
General + Research + Ownership
Payments
1
Total payment records
General Amount
$3
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-11-06
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Travere Therapeutics, Inc. | $3 |
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: 2019-07-10
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 |
|---|---|---|---|---|
| I20190710002372 | I | Nephrology | WA | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 172 | 129 | $0 |
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | 126 | 28 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 123 | 45 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 63 | 59 | $0 |
| 90961 | Dialysis services, 2-3 physician visits per month (20 years or older) | 56 | 19 | $0 |
Insurance plans in this area (ZIP 55905)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nephrology, Internal Medicine | WA | |
| Nephrology, Internal Medicine | WA | |
| Nurse Practitioner | WA | |
| Internal Medicine | WA | |
| N E P H R O L O G Y | AZ | |
| Nurse Practitioner | MA | |
| N E P H R O L O G Y | WA | |
| Internal Medicine, Nephrology, Critical Care (Intensivists) | WA | |
| Internal Medicine, Nephrology | RI |
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