MELISSA N LOJA (MD) – Vascular Surgery Physician, NPI 1578826749
Vascular Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
677 VASCULAR SURGERY in CA
Provider Addresses for MELISSA N LOJA (MD)
2540 East St
Concord, CA 945201906
Phone: (925) 682-8200
Type: Location
1601 Ygnacio Valley Rd
Walnut Creek, CA 945983122
Phone: (925) 939-3000
Type: Location
6001 Norris Canyon Rd
San Ramon, CA 945835400
Phone: (925) 275-9200
Type: Location
1200 B Gale Wilson Blvd
Fairfield, CA 945333552
Phone: (707) 646-5000
Type: Location
1000 Nut Tree Rd
Vacaville, CA 956874100
Phone: (707) 624-7000
Type: Location
1320 EL CAPITAN DR STE 120
DANVILLE, CA 945266260
Phone: (925) 676-2600
Type: Mailing
1860 PENNSYLVANIA AVE STE 120
FAIRFIELD, CA 945333550
Phone: (707) 646-4400
Fax: (707) 646-4461
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 92 Open Payments records for all available years, with a total value of $97,732.
Total Amount is formed as General ($97,732) + Research ($0) + Ownership ($0) = $97,732.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: ShockWave Medical, Inc ($53,834).
Total Amount
$97,732
General + Research + Ownership
Payments
92
Total payment records
General Amount
$97,732
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ShockWave Medical, Inc | $53,834 |
| Shockwave Medical, Inc | $37,408 |
| Abbott Laboratories | $5,004 |
| Medtronic, Inc. | $318 |
| Boston Scientific Corporation | $246 |
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: 2017-10-16
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20171016002476 | 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 |
|---|---|---|---|---|
| 93922 | Ultrasound study of arm and leg arteries | 171 | 119 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 166 | 124 | $0 |
| 93880 | Ultrasound of both sides of head and neck blood flow | 149 | 113 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 117 | 94 | $0 |
| 99441 | Telephone medical discussion with physician, 5-10 minutes | 106 | 92 | $0 |
Insurance plans in this area (ZIP 94520)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Vascular Surgery | CA | |
| Family Practice | CA | |
| Nurse Practitioner | CA | |
| Nurse Practitioner | CA | |
| Physical Therapist In Private Practice | CA | |
| Nurse Practitioner | CA | |
| Infectious Disease | CA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | CA | |
| Family Practice | CA | |
| Physician Assistant | CA |
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