SYLVIA GLADSTONE CASTRO (ARNP) – Family Nurse Practitioner, NPI 1912297219
Family Nurse Practitioner
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
6,261 NURSE PRACTITIONER in WA
Provider Addresses for SYLVIA GLADSTONE CASTRO (ARNP)
707 S GRADY WAY STE 600
RENTON, WA 980573227
Phone: (206) 823-1004
Fax: (206) 309-3319
Type: Mailing
16427 NE 145th St
Woodinville, WA 98072
Phone: (425) 481-4835
Type: Location
11812 N Creek Pkwy N Ste 202
Bothell, WA 980118202
Phone: (425) 287-5500
Fax: (425) 287-6440
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 36 Open Payments records for all available years, with a total value of $590.
Total Amount is formed as General ($590) + Research ($0) + Ownership ($0) = $590.
Last reported payment date: 2024-12-02 • Largest payer in this snapshot: Orexo US, Inc. ($325).
Total Amount
$590
General + Research + Ownership
Payments
36
Total payment records
General Amount
$590
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-02
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Orexo US, Inc. | $325 |
| Becton, Dickinson and Company | $122 |
| Alkermes, Inc. | $85 |
| Braeburn Inc. | $41 |
| Halozyme Inc | $17 |
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: 2017-05-25
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 |
|---|---|---|---|---|
| I20170525001786 | I | Nurse Practitioner | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 98057)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | WA | |
| Nurse Practitioner | WA |
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