Medicare Enrolled
Dr. Melissa Loja, MD
Vascular Surgery Physician · Fairfield, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Consulting-driven
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Loja from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Loja
Dr. Melissa Loja is a vascular surgery physician in Fairfield, CA, with 13 years of NPI registration. Based on federal Medicare data, Dr. Loja performed 1,419 Medicare services across 1,127 unique beneficiaries.
Between the years covered by Open Payments, Dr. Loja received a total of $127,452 from 38 pharmaceutical and/or device companies across 208 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in vascular surgery physician. The majority of payments are for consulting, which typically reflects recognized clinical expertise sought by manufacturers. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Loja is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 13 years in practice
▲ Top 26% volume in CA
$127,452 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,419
Medicare services
Top 26% in CA for vascular surgery physician
1,127
Unique beneficiaries
$122
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~109 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Ultrasound of arm and leg arteries This procedure uses sound waves to create images of the blood vessels in the arms and legs. It allows healthcare providers to examine the structure and blood flow within these arteries. |
171 | $61 | $270 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
166 | $114 | $308 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
149 | $179 | $632 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
117 | $81 | $216 |
| Telephone medical discussion, 5-10 minutes A phone conversation with a physician lasting between 5 and 10 minutes to discuss medical matters. |
106 | $32 | $40 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
104 | $144 | $443 |
| Ultrasound of hemodialysis access An ultrasound imaging test used to evaluate the blood flow and structure of a hemodialysis access site. |
103 | $120 | $425 |
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
75 | $10 | $161 |
| Ultrasound of leg arteries or grafts An imaging test that uses sound waves to create pictures of the blood vessels in the legs or any surgical grafts present. |
57 | $231 | $808 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in the arm or leg. The test uses sound waves to check blood flow and may include compression and other maneuvers. |
44 | $179 | $619 |
| Ultrasound guidance for blood vessel access Use of ultrasound imaging to help locate and access a blood vessel. This guidance assists healthcare providers in performing procedures such as inserting IV lines or drawing blood. |
42 | $12 | $110 |
| Ultrasound of leg arteries or grafts An ultrasound exam that uses sound waves to create images of the arteries in one leg or any grafts present in that leg. |
41 | $114 | $425 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
40 | $48 | $135 |
| Ultrasound of aorta, vena cava, groin vessels or bypass grafts This procedure uses sound waves to create images of the aorta, vena cava, groin vessels, or bypass grafts. It allows for the visualization of these blood vessels and any surgical grafts. |
32 | $103 | $381 |
| Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts A complete ultrasound exam of the aorta, vena cava, groin vessels, or bypass grafts. This imaging test uses sound waves to visualize these blood vessels. |
31 | $156 | $592 |
| Radiologist review of arm or leg artery image A radiologist reviews images of the arteries in the arm or leg. This process involves analyzing the visual data to assess the blood vessels. |
27 | $69 | $444 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in one arm or leg using compression and other maneuvers to assess blood flow and check for blockages. |
24 | $117 | $387 |
| Arm vein relocation with artery connection for hemodialysis A surgical procedure to move a vein in the arm and connect it to an artery to create access for hemodialysis. |
18 | $525 | $1,798 |
| Balloon angioplasty of leg artery, initial vessel A procedure to widen a narrowed or blocked artery in the leg using a balloon catheter. This is performed on the first vessel treated during the session. |
17 | $423 | $13,433 |
| Hemodialysis circuit intervention with balloon dilation A procedure to insert a needle or tube into a hemodialysis circuit and dilate the dialysis segment using a balloon, with radiological review. |
16 | $186 | $4,401 |
| Intraoperative EEG monitoring Recording brain wave activity during surgery to monitor neurological function. |
15 | $47 | $145 |
| Arterial thrombectomy, chest, neck, or brain A procedure to remove a blood clot and part of an artery in the chest, neck, or brain. |
13 | $893 | $3,028 |
| Pre-op ultrasound of artery and vein blood flow for hemodialysis access An ultrasound exam to assess blood flow in the arteries and veins on both sides of the body before surgery for hemodialysis access. |
11 | $228 | $848 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
4.4% high complexity
48.7% medium
46.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$127,452
Total received (2018-2024)
Avg $18,207/year across 7 years
Top 3% in CA for vascular surgery physician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
38
Companies
208
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$105,962 (83.1%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$13,858 (10.9%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$7,631 (6.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$41,526
2023
$56,206
2022
$15,170
2021
$5,418
2020
$4,308
2019
$4,267
2018
$556
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
ShockWave Medical, Inc
$37,408
Abbott Laboratories
$3,691
Inari Medical, Inc.
$145
Philips North America LLC
$106
BIOTISSUE HOLDINGS INC.
$98
Reflow Medical Inc
$30
Terumo Medical Corporation
$29
Bayer Healthcare Pharmaceuticals Inc.
$19
Top 3 companies account for 99.3% of 2024 payments
All-time payments by company (2018-2024) ›
ShockWave Medical, Inc
$101,051
Shockwave Medical, Inc
$15,078
Abbott Laboratories
$5,249
Medtronic, Inc.
$1,487
Bard Peripheral Vascular, Inc.
$1,346
Medtronic Vascular, Inc.
$1,035
Boston Scientific Corporation
$323
Janssen Pharmaceuticals, Inc
$220
W. L. Gore & Associates, Inc.
$175
Cardiovascular Systems Inc.
$165
Inari Medical, Inc.
$145
BIOTRONIK INC.
$145
Amgen Inc.
$133
Philips North America LLC
$106
BIOTISSUE HOLDINGS INC.
$98
Viz.ai, Inc.
$86
Terumo Medical Corporation
$63
Derma Sciences, Inc.
$59
Amniox Medical, Inc.
$51
Cook Medical LLC
$51
Kiniksa Pharmaceuticals, Ltd.
$46
Reflow Medical Inc
$30
BIOTISSUE HOLDINGS, INC.
$29
Ethicon US, LLC
$25
Actelion Pharmaceuticals US, Inc.
$25
BSN Medical Inc
$24
E.R. Squibb & Sons, L.L.C.
$23
Venclose Inc.
$23
Bayer Healthcare Pharmaceuticals Inc.
$19
Mallinckrodt Enterprises LLC
$19
Astellas Pharma US Inc
$18
Mallinckrodt LLC
$17
Penumbra, Inc.
$17
PFIZER INC.
$16
Esperion Therapeutics, Inc.
$15
ConvaTec Inc.
$13
Philips Electronics North America Corporation
$12
AstraZeneca Pharmaceuticals LP
$12
Top 3 companies account for 95.2% of all-time payments
Associated products mentioned in payments ›
(5044) MCOT · (5091) Amb Mon & Diag Und · (9281) Turbo Elite · AMNIOEXCEL · AMPLATZER AMULET · AQUACEL AG+ · AZUR CX DETACHABLE · Absolute Pro vascular stent system · Arcalyst · CUTIMED SORBION · ClosureFast · Crosser iQ · DIAMONDBACK PERIPHERAL · Diamondback Peripheral · ELIQUIS · ELUVIA · ENDURANT IIS · ESPRIT · EVRSF · Ellipsys · FARXIGA · FLOWTRIEVER CATHETER · GORE TAG Thoracic Branch Endoprosthesis · General - Therapies · General - Vascular Intervention · GlideWire · HI-TORQUE COMMAND · Hi-Torque Command guide wire · IGT D Peripheral · IN.PACT Admiral · Indigo · Kerendia · LEXISCAN · LIFESTENT · LIFESTREAM · Lutonix Drug Coated Balloon · NEOX · NEXLIZET · Navicross · OFIRMEV · OPSUMIT · Omnilink Elite vascular stent system · PROLENE · Passeo-18 · Perclose ProGlide suture mediated closure system · Peripheral Orbital Atherectomy System · Ranger · Repatha · S · SHOCKWAVE IVL SYSTEM WITH THE SHOCKWAVE C2 CORONARY IVL CATHETER · SUPERA · Shockwave IVL System with the Shockwave C2 Coronary IVL Catheter · Supera peripheral stent system · VENASEAL · VENOVO · Vascular Lithotripsy · VenaSeal · Venovo · Viz.AI LVO · XARELTO · ZENITH ALPHA
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
The majority of payments (83%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers. Total industry engagement is in the top 3% for vascular surgery physician in CA.
Geographic Context
Vascular surgery physicians within 10 mi
16
Per 100K population
3.5
County median income
$99,994
Nearest hospital
NORTHBAY MEDICAL CENTER
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Loja is a clinical cardiology specialist, with above-average Medicare volume (top 26% in CA), with consulting-driven industry engagement in the top 3% of CA peers.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Loja experienced with ultrasound of arm and leg arteries?
Based on Medicare claims data, Dr. Loja performed 171 ultrasound of arm and leg arteries services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Loja receive payments from pharmaceutical companies?
Yes. Dr. Loja received a total of $127,452 from 38 companies across 208 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Loja's costs compare to other vascular surgery physicians in Fairfield?
Dr. Loja's average Medicare payment per service is $122. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Loja) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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