DR. CHIDAMBARAM SUNDER VALLIAPPAN (M.D.) – Nephrology Physician, NPI 1265815021
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
12,368 INTERNAL MEDICINE in FL
Provider Addresses for DR. CHIDAMBARAM SUNDER VALLIAPPAN (M.D.)
515 WEKIVA COMMONS CIR
APOPKA, FL 327123645
Phone: (407) 464-9516
Fax: (407) 464-9519
Type: Mailing
515 Wekiva Commons Cir
Apopka, FL 327123645
Phone: (407) 464-9516
Fax: (407) 464-9519
Type: Location
3727 N GOLDENROD RD STE 105
WINTER PARK, FL 327928611
Phone: (407) 657-0296
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 27 Open Payments records for all available years, with a total value of $556.
Total Amount is formed as General ($556) + Research ($0) + Ownership ($0) = $556.
Last reported payment date: 2024-11-21 • Largest payer in this snapshot: Bayer Healthcare Pharmaceuticals Inc. ($104).
Total Amount
$556
General + Research + Ownership
Payments
27
Total payment records
General Amount
$556
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-21
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2020-08-17
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 |
|---|---|---|---|---|
| I20200817001641 | I | Internal Medicine | FL | 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 |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 240 | 87 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 216 | 75 | $0 |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 105 | 31 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 50 | 44 | $0 |
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | 39 | 15 | $0 |
Insurance plans in this area (ZIP 32712)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nephrology, Internal Medicine | FL | |
| N E P H R O L O G Y | FL | |
| N E P H R O L O G Y | FL | |
| Nurse Practitioner | FL | |
| N E P H R O L O G Y | FL | |
| N E P H R O L O G Y | FL | |
| Nephrology, Internal Medicine | FL | |
| Neuropsychiatry, Internal Medicine | FL | |
| Nurse Practitioner | FL | |
| Nephrology, Internal Medicine | FL |
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