DR. FREDERICK S TAN (MD) – Nephrology Physician, NPI 1689698615
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,168 NEPHROLOGY in TX
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Provider Addresses for DR. FREDERICK S TAN (MD)
2801, East 29th Street, Bryan, Brazos County, Texas, 77802, United States
STE 117
BRYAN, TX 778022618
Phone: (979) 774-3960
Fax: (979) 774-4506
Mailing address matches the actual address.
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 $39.
Total Amount is formed as General ($39) + Research ($0) + Ownership ($0) = $39.
Last reported payment date: 2023-08-23 • Largest payer in this snapshot: GlaxoSmithKline, LLC. ($39).
Total Amount
$39
General + Research + Ownership
Payments
1
Total payment records
General Amount
$39
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-08-23
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GlaxoSmithKline, LLC. | $39 |
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: 2011-03-31
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 |
|---|---|---|---|---|
| I20110331000337 | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 875 | 150 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 725 | 367 | $0 |
| 90970 | Dialysis services, per day, less than full month service (20 years or older) | 461 | 26 | $0 |
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | 428 | 58 | $0 |
| 90935 | Hemodialysis procedure with physician evaluation | 121 | 44 | $0 |
Insurance plans in this area (ZIP 77802)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| NEPHROLOGY | TX | 90961 | Dialysis services (2-3 physician visits per month), patient 20 years of age and older | 302 | 131 |
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