WARREN DAVID JOHNSTON (MD) – Cardiovascular Disease Physician, NPI 1427052802
Cardiovascular Disease Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
3,010 CARDIOVASCULAR DISEASE (CARDIOLOGY) in CA
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Provider Addresses for WARREN DAVID JOHNSTON (MD)
430, West La Veta Avenue, Orange, Orange County, California, 92866, United States
ORANGE, CA 928684226
Phone: (714) 543-5555
Fax: (714) 836-2427
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 54 Open Payments records for all available years, with a total value of $910.
Total Amount is formed as General ($910) + Research ($0) + Ownership ($0) = $910.
Last reported payment date: 2024-11-14 • Largest payer in this snapshot: Novartis Pharmaceuticals Corporation ($324).
Total Amount
$910
General + Research + Ownership
Payments
54
Total payment records
General Amount
$910
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-14
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Novartis Pharmaceuticals Corporation | $324 |
| Edwards Lifesciences Corporation | $174 |
| Abbott Laboratories | $147 |
| PFIZER INC. | $117 |
| E.R. Squibb & Sons, L.L.C. | $71 |
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: 2008-03-01
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 |
|---|---|---|---|---|
| I20080301000100 | I | Cardiovascular Disease (Cardiology) | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 527 | 315 | $0 |
| 93306 | Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 114 | 109 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 112 | 109 | $0 |
| 93000 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 95 | 95 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 71 | 71 | $0 |
Insurance plans in this area (ZIP 92868)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | CA | |
| - | CA | |
| - | CA | |
| - | WA | |
| - | ME | |
| - | CA | |
| - | CA | |
| - | CA | |
| - | CA | |
| - | CA |
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