Medicare Enrolled
Dr. Louis Liou, M.D., PH.D.
Urology Physician · Cambridge, MA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
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. Liou 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 →
Are you Dr. Liou?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Liou
Dr. Louis Liou is an urology physician in Cambridge, MA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Liou performed 978 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Liou received a total of $155,831 from 39 pharmaceutical and/or device companies across 217 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Liou 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 of NPI registration
▲ 978 Medicare services
$155,831 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗978
Medicare services
Bottom 35% in MA for urology physician
Lower Medicare volume may reflect subspecialty focus, hospital-based work, or a higher share of non-Medicare patients.
Not available
Unique patients (not deduplicated)
$66
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
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 |
|---|---|---|---|
| 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. |
175 | $95 | $432 |
| Urinalysis, manual A manual laboratory examination of a urine sample to check for various substances and cells. |
129 | $3 | $43 |
| Bladder ultrasound after voiding An ultrasound scan performed after urination to measure the amount of urine remaining in the bladder. |
127 | $10 | $122 |
| 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. |
96 | $64 | $359 |
| Electronic assessment of bladder emptying A test that uses electronic monitoring to evaluate how well the bladder empties urine. |
61 | $5 | $59 |
| Cystourethroscopy A diagnostic exam of the bladder and urethra using an endoscope to visually inspect the urinary tract. |
61 | $65 | $633 |
| 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. |
56 | $114 | $552 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
55 | $80 | $441 |
| Abdominal device insertion with pressure and urine flow study A procedure involving the placement of a device into the abdomen, accompanied by a study to measure pressure and urine flow rate. |
37 | $148 | $590 |
| 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. |
37 | $135 | $606 |
| Non-needle muscle activity measurement of bladder and bowel openings This procedure measures and records the electrical activity of muscles at the bladder and bowel openings without using needles. |
36 | $25 | $363 |
| Simple insertion of temporary bladder tube A procedure to place a temporary tube into the bladder. This allows for the drainage of urine from the bladder. |
25 | $20 | $328 |
| Complex urodynamic pressure measurement A test that measures the pressure of urine flow in the bladder along with urethral and voiding pressures. |
23 | $356 | $1,414 |
| Bladder irrigation and/or instillation This procedure involves flushing the bladder with fluid to clear it or introducing medication directly into the bladder. |
18 | $24 | $159 |
| Complex urodynamic pressure flow study A test that measures the pressure of urine flow in the bladder during voiding to evaluate how well the bladder and urethra are functioning. |
14 | $194 | $804 |
| Prostate gland biopsy A procedure to remove small samples of tissue from the prostate gland for laboratory examination. |
14 | $109 | $791 |
| Transrectal ultrasound of the pelvis An ultrasound imaging procedure where a probe is inserted into the rectum to visualize pelvic structures. |
14 | $27 | $201 |
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. These counts do not measure clinical quality or years of experience.
Industry Payment Transparency
Open Payments through 2024 ↗$155,831
Total received (2018-2024)
Avg $22,262/year across 7 years
Top 3% in MA for urology physician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
39
Companies
217
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$113,874
2023
$31,801
2022
$1,491
2021
$2,814
2020
$275
2019
$3,740
2018
$1,835
Payments by company (2024)
AngioDynamics, Inc.
$108,260
Activ Surgical, Inc.
$3,000
Ambu A/S
$750
BK Medical Holding Company Inc.
$742
Boston Scientific Corporation
$645
Teleflex LLC
$172
PROCEPT BioRobotics Corporation
$169
DENTSPLY IH AB
$53
Myriad Genetic Laboratories, Inc.
$40
Telix Pharmaceuticals
$24
Agiliti Surgical, Inc.
$20
Top 3 companies account for 98.4% of 2024 payments
All-time payments by company (2018-2024) ›
AngioDynamics, Inc.
$135,667
BK Medical Holding Company Inc.
$4,224
Activ Surgical, Inc.
$3,000
Teleflex LLC
$2,528
PROCEPT BioRobotics Corporation
$1,983
Boston Scientific Corporation
$1,416
BOSTON SCIENTIFIC CORPORATION
$1,130
Ambu A/S
$750
Allergan, Inc.
$667
Koelis Inc.
$644
HealthTronics Mobile Solutions, LLC
$579
Astellas Pharma US Inc
$532
Lumenis, Inc
$350
Retrophin, Inc.
$310
EDAP TECHNOMED INC
$284
Myriad Genetic Laboratories, Inc.
$244
NeoTract Inc.
$196
Olympus America Inc.
$184
Covidien LP
$158
ABBVIE INC.
$150
Endo Pharmaceuticals Inc.
$132
Agiliti Surgical, Inc.
$114
Richard Wolf Medical Instruments Corp.
$92
Janssen Biotech, Inc.
$87
DENTSPLY IH Inc.
$85
DENTSPLY IH AB
$53
Allergan Inc.
$40
180 Medical, Inc.
$27
Telix Pharmaceuticals
$24
Axonics, Inc.
$23
Myovant Sciences Inc.
$22
C. R. BARD, INC. & SUBSIDIARIES
$19
Integra LifeSciences Corporation
$18
Progenics Pharmaceuticals, Inc.
$17
Rochester Medical Corporation
$17
Coloplast Corp
$17
Orthofix Medical, Inc.
$16
Smith+Nephew, Inc.
$16
Tolmar, Inc.
$15
Top 3 companies account for 91.7% of all-time payments
Associated products mentioned in payments ›
(815) Thiola · AQUABEAM ROBOTIC SYSTEM · AQUABEAM SYSTEM · AquaBeam Robotic System · Axonics · BOTOX · BOTOX COSMETIC · BRACANALYSIS CDX · ELIGARD · Emprint · Erleada · GENERAL BPH · GENERAL BPH · GENTLECATH · GREENLIGHT · ILLUCCIX · LOFRIC · LoFric · MYRBETRIQ · Mobile Cryoblation Services · Mobile Laser Services · Myrbetriq · NANOKNIFE · NanoKnife · OMNIGRAFT · ORGOVYX · Olympus Cystoscopes · Olympus Laser Devices · PROLARIS · PYLARIFY · Physio-Stim Osteogenesis Stimulator · Prolaris · REZUM · Rezum Generator · SPEEDICATH · STRAVIX · Sonablate HIFU · SpaceOAR System · SpaceOAR VUE System - 10mL · TACROLIMUS · Trinity · UROLIFT · UroLift · UroLift 2 System · UroLift ATC System · UroLift System · XIAFLEX · XTANDI · bk3000 · bk3500 & bk5000 Ultrasound System · rezum Generator
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. 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 →
Geographic Context
Urology physicians in nearby ZIP areas
220
County median income
$126,779
Nearest hospital to ZIP centroid (approximate)
CAMBRIDGE HEALTH ALLIANCE
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | 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. Liou is a clinical cardiology specialist, with moderate Medicare volume, 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. Liou experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Liou performed 175 office visit, established patient (30-39 min) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Liou receive payments from pharmaceutical companies?
Yes. Dr. Liou received a total of $155,831 from 39 companies across 217 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. 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. Liou's costs compare to other urology physicians in Cambridge?
Dr. Liou's average Medicare payment per service is $66. 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. Liou) 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 the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. 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?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: 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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