TOMAS DIAZ – Emergency Medicine Physician, NPI 1235524083
Emergency Medicine Physician
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Profile Insights
NPPES metrics only — not quality of care.
5,826 EMERGENCY MEDICINE in CA
Provider Addresses for TOMAS DIAZ
UCSF DEPARTMENT OF EMERGENCY MEDICINE
505 PARNASSUS AVENUE, ROOM M24
SAN FRANCISCO, CA 941430001
Phone: (201) 956-5977
Type: Mailing
718 TEANECK RD
TEANECK, NJ 076664245
Phone:
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2023-09-15
PECOS data refreshed: 2026-06-15
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20190619003487 | I | Emergency Medicine | CA | TBD |
| I20230915000646 | I | Emergency Medicine | NJ | 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 | 121 | 118 | $0 |
| 99284 | Emergency department visit with moderate level of medical decision making | 77 | 76 | $0 |
| 99291 | Critical care, first 30-74 minutes | 20 | 20 | $0 |
| 99283 | Emergency department visit with low level of medical decision making | 18 | 18 | $0 |
Insurance plans in this area (ZIP 94143)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | NJ | |
| Emergency Medicine | PA | |
| Nurse Practitioner | PA | |
| Emergency Medicine | NY | |
| Emergency Medicine | NJ | |
| Emergency Medicine | NJ | |
| Nurse Practitioner | NJ | |
| Emergency Medicine | NJ | |
| Nurse Practitioner | NJ | |
| Emergency Medicine | NJ |
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