GEOFFREY WALKER (MD) – Nephrology Physician, NPI 1306890058
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for GEOFFREY WALKER (MD)
PO BOX 660132
DALLAS, TX 752660132
Phone: (214) 358-2300
Fax: (214) 366-6127
Type: Mailing
2005 W PARK DR STE 200
IRVING, TX 750612034
Phone: (214) 358-2300
Fax: (214) 579-6984
Type: Location
1625, North Story Road, Irving, Dallas County, Texas, 75061, United States
IRVING, TX 750611954
Phone: (214) 358-2300
Fax: (214) 366-6220
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 7 Open Payments records for all available years, with a total value of $542.
Total Amount is formed as General ($542) + Research ($0) + Ownership ($0) = $542.
Last reported payment date: 2024-12-12 • Largest payer in this snapshot: Fresenius USA Marketing, Inc. ($212).
Total Amount
$542
General + Research + Ownership
Payments
7
Total payment records
General Amount
$542
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-12
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Fresenius USA Marketing, Inc. | $212 |
| NxStage Medical, Inc. | $176 |
| Ardelyx, Inc. | $131 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $22 |
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: 2010-09-10
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 |
|---|---|---|---|---|
| I20100910000148 | I | Nephrology | TX | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 75266)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| N E P H R O L O G Y | TX | |
| N E P H R O L O G Y | TX | |
| Internal Medicine, Nephrology | NY | |
| N E P H R O L O G Y | TX | |
| Nephrology, Internal Medicine | TX | |
| - | OH | |
| Nephrology, Internal Medicine | TX | |
| N E P H R O L O G Y | TX | |
| Registered Dietitian Or Nutrition Professional | TX | |
| Nephrology, Internal Medicine | TX |
Reviews
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