WARREN TOSHIRO YAMASHITA (MD, MPH) – Addiction Medicine (Family Medicine) Physician, NPI 1982137691
Addiction Medicine (Family Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
13,194 FAMILY PRACTICE in CA
Provider Addresses for WARREN TOSHIRO YAMASHITA (MD, MPH)
1100B N Tustin Ave Ste A
Santa Ana, CA 927053505
Phone: (714) 247-0300
Fax: (714) 259-1598
Type: Location
14642 Newport Ave Ste 200
Tustin, CA 927806058
Phone: (714) 247-0300
Fax: (714) 259-1598
Type: Location
947 S Anaheim Blvd Ste 260
Anaheim, CA 928055591
Phone: (714) 247-0300
Fax: (714) 259-1598
Type: Location
401, Quarry Road, Stanford, Palo Alto, Santa Clara County, California, 94305-6015, United States
PALO ALTO, CA 943041419
Phone: (650) 724-1765
Fax: (808) 932-4303
Type: Mailing
1 HOPE DR
TUSTIN, CA 927820221
Phone: (714) 247-0300
Fax: (714) 259-1598
Type: Location
14642 NEWPORT AVE STE 300
TUSTIN, CA 927806059
Phone: (714) 247-0300
Fax: (714) 259-1369
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 19 Open Payments records for all available years, with a total value of $489.
Total Amount is formed as General ($489) + Research ($0) + Ownership ($0) = $489.
Last reported payment date: 2024-12-12 • Largest payer in this snapshot: ABBVIE INC. ($88).
Total Amount
$489
General + Research + Ownership
Payments
19
Total payment records
General Amount
$489
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-12
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $88 |
| ViiV Healthcare Company | $67 |
| Indivior Inc. | $65 |
| Novo Nordisk Inc | $45 |
| Amgen Inc. | $31 |
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: 2020-10-15
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 |
|---|---|---|---|---|
| I20201015002454 | I | Family Practice | 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 92705)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| O B S T E T R I C S/ G Y N E C O L O G Y | CA | |
| P O D I A T R Y | CA | |
| Family Practice | CA | |
| Physician Assistant | CA | |
| Clinical Social Worker | CA | |
| - | TN | |
| Nurse Practitioner | CA | |
| Family Practice | CA | |
| - | CA | |
| Family Practice | CT |
Reviews
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