Medicare Enrolled
Dr. Michael Koumjian, MD
Thoracic Surgery · La Mesa, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
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. Koumjian 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. Koumjian
Dr. Michael Koumjian is a thoracic surgery specialist in La Mesa, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Koumjian performed 1,098 Medicare services across 663 unique beneficiaries.
Between the years covered by Open Payments, Dr. Koumjian received a total of $27,968 from 35 pharmaceutical and/or device companies across 237 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in thoracic surgery. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Koumjian 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.
✓ 20 years in practice
▲ Top 6% volume in CA
$27,968 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,098
Medicare services
Top 6% in CA for thoracic surgery
663
Unique beneficiaries
$103
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~55 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 |
|---|---|---|---|
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
477 | $64 | $125 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
151 | $138 | $300 |
| Left heart catheterization with radiologist review A tube is inserted into the left side of the heart to gather diagnostic information. A radiologist reviews the procedure or images obtained during the test. |
55 | $171 | $472 |
| Heart ultrasound interpretation and report A professional review and written report of an ultrasound image of the heart. |
45 | $70 | $347 |
| CT scan of abdomen and pelvis with contrast A CT scan that uses dye to create detailed images of the abdomen and pelvis. This imaging test helps doctors examine internal organs and structures in these areas. |
39 | $69 | $182 |
| Radiologist review of chest aorta image A radiologist examines and interprets an image of the aorta in the chest to assess its structure and condition. |
37 | $19 | $75 |
| CT scan of chest, without contrast A computed tomography scan of the chest area that uses X-rays to create detailed images without the use of contrast dye. |
34 | $42 | $85 |
| 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. |
31 | $72 | $145 |
| Transcatheter aortic valve replacement via femoral artery A minimally invasive procedure to replace a diseased aortic heart valve using a catheter inserted through the skin and femoral artery. |
23 | $585 | $3,615 |
| Chest X-ray, 1 view An X-ray image of the chest taken from a single angle. This imaging test is used to visualize the structures within the chest cavity. |
22 | $7 | $60 |
| New patient office visit, complex (60-74 min) | 22 | $180 | $350 |
| 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. |
21 | $29 | $153 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
20 | $148 | $285 |
| 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. |
19 | $26 | $90 |
| Coronary artery bypass graft, 1 artery Surgical procedure to bypass a blocked coronary artery using a graft from another artery. This restores blood flow to the heart muscle. |
17 | $850 | $5,353 |
| CT scan of heart blood vessels and grafts with contrast A CT scan that uses contrast dye to create detailed images of the heart's blood vessels and any surgical grafts. |
17 | $92 | $150 |
| Follow-up heart ultrasound An ultrasound of the heart performed to monitor or reassess a previously identified condition or treatment progress. |
16 | $20 | $115 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
15 | $45 | $116 |
| Insertion of chest tube for lung fluid drainage A procedure to place a tube into the chest cavity to drain excess fluid from around the lungs. |
13 | $164 | $2,013 |
| Endoscopic vein harvest A surgical procedure to remove a vein using an endoscope, which is a thin, lighted tube inserted through small incisions. |
13 | $9 | $1,157 |
| Same-day hospital admission and discharge, low complexity Initial hospital care for a patient admitted and discharged on the same day, involving straightforward or low-level medical decision making. The visit requires at least 45 minutes of time if time is used to determine the level of service. |
11 | $80 | $250 |
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.
8.7% high complexity
18.8% medium
72.6% routine
Industry Payment Transparency
Open Payments through 2024 ↗$27,968
Total received (2018-2024)
Avg $3,995/year across 7 years
Top 16% in CA for thoracic surgery
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
35
Companies
237
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.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$19,608 (70.1%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$8,360 (29.9%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$3,230
2023
$3,198
2022
$10,738
2021
$2,491
2020
$1,164
2019
$4,889
2018
$2,258
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
ABIOMED
$1,017
Medical Device Business Services, Inc.
$731
Medtronic, Inc.
$453
Ethicon US, LLC
$319
W. L. Gore & Associates, Inc.
$205
Artivion, Inc.
$137
BIOTRONIK INC.
$126
AstraZeneca Pharmaceuticals LP
$121
ATRICURE, INC.
$120
Top 3 companies account for 68.2% of 2024 payments
All-time payments by company (2018-2024) ›
Medtronic, Inc.
$10,259
Abbott Laboratories
$3,465
CVRx, Inc.
$1,759
Edwards Lifesciences Corporation
$1,600
ABIOMED
$1,548
Aziyo Biologics, Inc.
$1,318
Ethicon US, LLC
$1,004
Medtronic Vascular, Inc.
$732
Medical Device Business Services, Inc.
$731
AstraZeneca Pharmaceuticals LP
$718
BIOTRONIK INC.
$595
AtriCure, Inc.
$588
La Jolla Pharmaceutical Company
$461
W. L. Gore & Associates, Inc.
$365
Acacia Pharma Inc
$245
Janssen Pharmaceuticals, Inc
$243
LivaNova USA, Inc.
$228
Boston Scientific Corporation
$217
ShockWave Medical, Inc
$204
ATRICURE, INC.
$193
Davol Inc.
$163
CryoLife, Inc.
$159
Artivion, Inc.
$137
ACIST MEDICAL SYSTEMS, INC.
$134
Chiesi USA, Inc.
$130
United Therapeutics Corporation
$125
E.R. Squibb & Sons, L.L.C.
$121
Genentech USA, Inc.
$117
Merck Sharp & Dohme Corporation
$100
Cardiovascular Systems Inc.
$92
Philips Electronics North America Corporation
$75
Terumo Cardiovascular Systems Corporation
$43
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$40
Bolton Medical Inc
$35
PFIZER INC.
$24
Top 3 companies account for 55.4% of all-time payments
Associated products mentioned in payments ›
AMDS-Ascyrus Medical · AMVIA EDGE · ANDEXXA · APPOSE ULC · ATRICLIP LAA EXCLUSION SYSTEM · ATRICURE CRYOICE CRYOABLATION SYSTEM (CRYO2) · ATRICURE CRYOICE CRYOSPHERE CRYOABLATION SYSTEM · BYFAVO · Barostim Neo System · C3 Delivery System · CARPENTIER-EDWARDS PERIMOUNT MAGNA MITRAL EASE PERICARDIAL BIOPROSTHESIS · CLEVIPREX · CoreValve Evolut · Coronary Orbital Atherectomy System · Crown PRT · ECHELON ENDOPATH · ECHELON FLEX Stapler · ECM · ECM Patch · EDWARDS INTUITY Elite valve system · EDWARDS SAPIEN 3 TRANSCATHETER HEART VALVE (THV) · ELIQUIS · ENDURANT IIS · EVARREST · EXCLUDER Conformable AAA Endoprosthesis with Active Control · Echelon Circular · Echelon Flex · Echelon; Endopath · Edora · Edora 8 DR-T · Edwards SAPIEN 3 Transcatheter Heart Valve · Edwards SAPIEN 3 Ultra Transcatheter Heart Valve · Endurant · FARXIGA · FASENRA · GENERAL METALLIC STENTS · GENERAL VASCULAR INTERVENTION · GIAPREZA · GORE TAG Conformable Thoracic Endoprosthesis · HAWKONE · HD-IVUS · IGT_D Coronary · INSPIRIS RESILIA AORTIC VALVE · INSPIRIS RESILIA aortic valve · Impella · KONECT RESILIA · LifeVest · MITRIS RESILIA Mitral Valve · Mitra Clip system · MitraClip System · ON-X AORTIC HEART VALVE WITH CONFORM-X SEWING RING AND EXTENDED HOLDER · ONYX FRONTIER · On-X · PROLENE · Pouch · Relay Grafts · Resolute · Rivacor 7 DR-T · SHOCKWAVE IVL SYSTEM WITH THE SHOCKWAVE C2 CORONARY IVL CATHETER · SIGNIA · SONICISION · SYNERGY ABLATION SYSTEM · Sentus · Signia · TEZSPIRE · Trifecta GT Tissue Heart Valve · VALIANT CAPTIVIA · VALLEYLAB FT10 · VISTASEAL · Valiant Navion · Vascutek · Virtuosaph · XARELTO · Xolair · ZERBAXA
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 →
Most payments (70%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Thoracic surgerists within 10 mi
44
Per 100K population
1.3
County median income
$102,285
Nearest hospital
GROSSMONT HOSPITAL
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. Koumjian is a mixed practice specialist, with above-average Medicare volume (top 6% in CA), with low-engagement industry engagement in the top 16% of CA peers, with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Koumjian experienced with hospital follow-up visit, moderate complexity?
Based on Medicare claims data, Dr. Koumjian performed 477 hospital follow-up visit, moderate complexity 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. Koumjian receive payments from pharmaceutical companies?
Yes. Dr. Koumjian received a total of $27,968 from 35 companies across 237 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. Koumjian's costs compare to other thoracic surgerists in La Mesa?
Dr. Koumjian's average Medicare payment per service is $103. 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. Koumjian) 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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