WILLIAM SHYY (M.D.) – Emergency Medicine Physician, NPI 1013202274
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for WILLIAM SHYY (M.D.)
505 PARNASSUS AVE
SAN FRANCISCO, CA 941432204
Phone: (415) 353-1037
Type: Mailing
1250 16TH ST
SANTA MONICA, CA 904041249
Phone: (310) 794-7700
Type: Location
5841 S Maryland Ave
MC 5068
Chicago, IL 606371447
Phone: (515) 451-2134
Type: Location
505 Parnassus Ave
San Francisco, CA 941432204
Phone: (415) 476-1000
Type: Location
5767 W CENTURY BLVD STE 400
LOS ANGELES, CA 900455631
Phone:
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 $96.
Total Amount is formed as General ($96) + Research ($0) + Ownership ($0) = $96.
Last reported payment date: 2024-09-13 • Largest payer in this snapshot: Lilly USA, LLC ($96).
Total Amount
$96
General + Research + Ownership
Payments
1
Total payment records
General Amount
$96
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-09-13
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Lilly USA, LLC | $96 |
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: 2014-10-10
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 |
|---|---|---|---|---|
| I20141010000329 | I | Emergency Medicine | CA | 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 |
|---|---|---|---|---|
| 99285 | Emergency department visit with high level of medical decision making | 205 | 204 | $0 |
| 99284 | Emergency department visit with moderate level of medical decision making | 123 | 121 | $0 |
| 99291 | Critical care, first 30-74 minutes | 31 | 31 | $0 |
| 99283 | Emergency department visit with low level of medical decision making | 29 | 28 | $0 |
Insurance plans in this area (ZIP 94143)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| O P H T H A L M O L O G Y | CA | |
| Hospitalist, Internal Medicine | CA | |
| - | CA | |
| Physician Assistant | CA | |
| - | CA | |
| - | ID | |
| Diagnostic Radiology | CA | |
| - | MD | |
| Orthopedic Surgery | CA | |
| N E U R O L O G Y | CA |
Reviews
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