DR. JAMES JEROME ZIMMERMAN (M.D.) – Vascular Surgery Physician, NPI 1093729121
Vascular Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
675 VASCULAR SURGERY in CA
Loading map...
Provider Addresses for DR. JAMES JEROME ZIMMERMAN (M.D.)
325, Distel Circle, Los Altos, Santa Clara County, California, 94022, United States
LOS ALTOS, CA 940221408
Phone: (650) 366-0225
Type: Mailing
2900, Whipple Avenue, Redwood City, San Mateo County, California, 94070, United States
SUITE 225
REDWOOD CITY, CA 940622851
Phone: (650) 366-0225
Fax: (650) 367-6085
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 39 Open Payments records for all available years, with a total value of $6,483.
Total Amount is formed as General ($6,483) + Research ($0) + Ownership ($0) = $6,483.
Last reported payment date: 2024-11-21 • Largest payer in this snapshot: Penumbra, Inc. ($4,687).
Total Amount
$6,483
General + Research + Ownership
Payments
39
Total payment records
General Amount
$6,483
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-21
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Penumbra, Inc. | $4,687 |
| Medtronic, Inc. | $1,071 |
| W. L. Gore & Associates, Inc. | $414 |
| Philips Electronics North America Corporation | $181 |
| Philips North America LLC | $64 |
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: 2008-07-02
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 |
|---|---|---|---|---|
| I20080702000383 | I | Vascular Surgery | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 423 | 296 | $0 |
| 93922 | Ultrasound study of arm and leg arteries | 164 | 134 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 120 | 104 | $0 |
| 93926 | Ultrasound of one leg arteries or artery grafts | 99 | 80 | $0 |
| 93990 | Ultrasound of hemodialysis access | 95 | 41 | $0 |
Insurance plans in this area (ZIP 94022)
Loading plans...
Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| VASCULAR SURGERY | CA | 93922 | Ultrasound study of arteries of both arms and legs | 469 | 269 |
| VASCULAR SURGERY | CA | 93926 | Ultrasound study of arteries and arterial grafts of one leg or limited | 189 | 113 |
| VASCULAR SURGERY | CA | 93971 | Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers | 51 | 49 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| D E R M A T O L O G Y | CA | |
| A L L E R G Y/ I M M U N O L O G Y | CA | |
| - | CA | |
| Hospitalist, Obstetrics/Gynecology | CA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | OR | |
| - | CA | |
| - | CA | |
| - | CA | |
| - | CA | |
| A N E S T H E S I O L O G Y | CA |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.