IRINA V WILLIAMS (M.D.) – Pain Medicine (Anesthesiology) Physician, NPI 1508187600
Pain Medicine (Anesthesiology) Physician
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Profile Insights
NPPES metrics only — not quality of care.
6,371 ANESTHESIOLOGY in CA
Provider Addresses for IRINA V WILLIAMS (M.D.)
2255 Post St
San Francisco, CA 941153427
Phone: (415) 885-7246
Type: Location
905 Maple St Fl 3
Redwood City, CA 940632057
Phone: (650) 299-4396
Type: Location
1411 E 31ST ST
OAKLAND, CA 94602
Phone: (510) 437-4800
Type: Location
530 EGRET RD
LIVERMORE, CA 945516105
Phone:
Type: Mailing
2255 POST ST
SAN FRANCISCO, CA 941153427
Phone:
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 4 Open Payments records for all available years, with a total value of $139.
Total Amount is formed as General ($139) + Research ($0) + Ownership ($0) = $139.
Last reported payment date: 2024-10-29 • Largest payer in this snapshot: ABBVIE INC. ($90).
Total Amount
$139
General + Research + Ownership
Payments
4
Total payment records
General Amount
$139
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-29
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $90 |
| Saluda Medical Americas, Inc. | $49 |
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: 2018-07-27
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 |
|---|---|---|---|---|
| I20180727001400 | I | Anesthesiology | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 94115)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine | DC | |
| Colorectal Surgery (Proctology), General Surgery | LA | |
| - | CA | |
| N E U R O S U R G E R Y | MA | |
| Internal Medicine | CA | |
| Nurse Practitioner | CA | |
| Internal Medicine | CA | |
| Emergency Medicine | CA | |
| - | MA | |
| Emergency Medicine | CA |
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