Medicare Enrolled
Dr. Sajen Mathews, MD
Gastroenterology · Fullerton, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
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. Mathews 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. Mathews
Dr. Sajen Mathews is a gastroenterology specialist in Fullerton, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Mathews performed 771 Medicare services across 720 unique beneficiaries.
Between the years covered by Open Payments, Dr. Mathews received a total of $14,047 from 46 pharmaceutical and/or device companies across 638 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in gastroenterology. 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. Mathews 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 46% volume in CA
$14,047 industry payments
Medicare Practice Summary
Medicare Utilization ↗771
Medicare services
Top 46% in CA for gastroenterology
720
Unique beneficiaries
$95
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~39 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 |
|---|---|---|---|
| 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. |
164 | $104 | $345 |
| Moderate sedation during GI endoscopy Sedation services provided by the physician performing a gastrointestinal endoscopic procedure. This requires an independent trained observer to assist in monitoring the patient. |
135 | $4 | $163 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
84 | $72 | $245 |
| 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. |
75 | $124 | $447 |
| Colon polyp removal with endoscopic snare This procedure removes polyps or growths from the large bowel using a flexible tube with a camera and a wire loop tool. The snare is used to cut off the growths during the examination. |
59 | $214 | $1,297 |
| Colonoscopy with biopsy A procedure to collect tissue samples from the large intestine using a flexible tube with a camera. The samples are examined to check for abnormalities or disease. |
51 | $103 | $1,260 |
| Upper GI endoscopy with biopsy A procedure to collect tissue samples from the esophagus, stomach, or upper small intestine using a flexible tube with a camera. The samples are examined to check for abnormalities. |
48 | $72 | $1,113 |
| Colonoscopy for colorectal cancer screening A colonoscopy performed to screen for colorectal cancer in individuals who are not at high risk for the disease. |
27 | $192 | $970 |
| Colonoscopy for colorectal cancer screening, high risk A colonoscopy performed to screen for colorectal cancer in individuals identified as being at high risk for the disease. |
26 | $192 | $970 |
| 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. |
24 | $76 | $245 |
| Upper endoscopy (EGD) A diagnostic exam of the esophagus, stomach, and upper small bowel using a flexible endoscope. |
22 | $65 | $866 |
| 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. |
16 | $92 | $302 |
| Esophageal dilation with guide wire and endoscope A flexible endoscope is used to insert a guide wire into the esophagus, followed by dilation to widen the esophageal passage. |
15 | $93 | $1,212 |
| Colonoscopy A diagnostic exam of the large bowel using a flexible endoscope to visualize the interior of the colon. |
14 | $151 | $970 |
| Telephone medical discussion, 5-10 minutes A phone conversation with a physician lasting between 5 and 10 minutes to discuss medical matters. |
11 | $43 | $153 |
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.
Industry Payment Transparency
Open Payments through 2024 ↗$14,047
Total received (2018-2024)
Avg $2,007/year across 7 years
Top 14% in CA for gastroenterology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
46
Companies
638
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
$14,047 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$2,382
2023
$2,624
2022
$2,436
2021
$1,597
2020
$640
2019
$2,336
2018
$2,032
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Lilly USA, LLC
$407
Janssen Biotech, Inc.
$376
Ardelyx, Inc.
$316
ABBVIE INC.
$291
Gilead Sciences, Inc.
$203
Takeda Pharmaceuticals U.S.A., Inc.
$188
GENZYME CORPORATION
$177
Enterra Medical, Inc.
$166
PFIZER INC.
$96
Madrigal Pharmaceuticals
$34
Regeneron Healthcare Solutions, Inc.
$25
Celltrion USA Inc.
$24
Boehringer Ingelheim Pharmaceuticals, Inc.
$22
Celgene Corporation
$22
Phathom Pharmaceuticals, Inc.
$18
Janssen Pharmaceuticals, Inc
$17
Top 3 companies account for 46.1% of 2024 payments
All-time payments by company (2018-2024) ›
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$2,045
Janssen Biotech, Inc.
$1,575
ABBVIE INC.
$1,376
Gilead Sciences, Inc.
$1,115
Takeda Pharmaceuticals U.S.A., Inc.
$907
PFIZER INC.
$564
AbbVie Inc.
$530
AbbVie, Inc.
$507
Endogastric Solutions, Inc
$450
Lilly USA, LLC
$407
Celgene Corporation
$402
GENZYME CORPORATION
$370
Ardelyx, Inc.
$338
Enterra Medical, Inc.
$337
Medtronic, Inc.
$296
Regeneron Healthcare Solutions, Inc.
$264
Boston Scientific Corporation
$248
Actelion Pharmaceuticals US, Inc.
$247
Covidien LP
$217
Daiichi Sankyo Inc.
$199
Boehringer Ingelheim Pharmaceuticals, Inc.
$188
Allergan Inc.
$148
Fresenius Kabi USA, LLC
$121
Dova Pharmaceuticals
$119
Janssen Scientific Affairs, LLC
$115
E.R. Squibb & Sons, L.L.C.
$110
QOL Medical, LLC
$105
AstraZeneca Pharmaceuticals LP
$104
Shionogi Inc
$94
Merck Sharp & Dohme Corporation
$64
Intercept Pharmaceuticals, Inc.
$57
Ironwood Pharmaceuticals, Inc
$52
Prometheus Laboratories Inc.
$46
INTERCEPT PHARMACEUTICALS, INC.
$40
UCB, Inc.
$39
Endo Pharmaceuticals Inc.
$38
Madrigal Pharmaceuticals
$34
W. L. Gore & Associates, Inc.
$30
Celltrion USA Inc.
$24
Dynavax Technologies Corporation
$24
Alnylam Pharmaceuticals Inc.
$23
Olympus America Inc.
$19
Phathom Pharmaceuticals, Inc.
$18
Janssen Pharmaceuticals, Inc
$17
Organon LLC
$13
INTRA-SANA LABORATORIES
$10
Top 3 companies account for 35.6% of all-time payments
Associated products mentioned in payments ›
AXIOS · Amitiza · Barrx · CARDIOFORM Septal Occluder · COLOGUARD · CYLTEZO · Cimzia · DALVANCE · DIFICID · DUPIXENT · Doptelet · ENDOFLIP · ENTYVIO · ESOPHYX · EndoFlip · Entyvio · FARXIGA · GATTEX · GI GENIUS · GIVLAARI · GORE CARDIOFORM Septal Occluder · General - Biliary Devices · HUMIRA · Heplisav-B · Humira · IBSRELA · IDACIO · INFLECTRA · INJECTAFER · JARDIANCE · LINZESS · Linzess · MOTEGRITY · MOUNJARO · Motegrity · Mulpleta · NASCOBAL · NUVARING · OCALIVA · OMVOH · Olympus Hemostasis Devices · RELISTOR · RELISTOR ORAL · RELTONE 200 MG · REMICADE · RENFLEXIS · RESMETIROM · RINVOQ · SKYRIZI · STELARA · Sucraid · Symproic · TREMFYA · TRULANCE · UCERIS · VEGZELMA · VIBERZI · VOQUEZNA · XARELTO · XELJANZ · XIFAXAN · XIFAXANIBSD · ZEPATIER · ZEPOSIA
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 (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Gastroenterologists within 10 mi
386
Per 100K population
12.2
County median income
$113,702
Nearest hospital
PROVIDENCE ST. JUDE 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. Mathews is a clinical cardiology specialist, with moderate Medicare volume, with low-engagement industry engagement in the top 14% 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. Mathews experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Mathews performed 164 office visit, established patient (30-39 min) 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. Mathews receive payments from pharmaceutical companies?
Yes. Dr. Mathews received a total of $14,047 from 46 companies across 638 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. Mathews's costs compare to other gastroenterologists in Fullerton?
Dr. Mathews's average Medicare payment per service is $95. 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. Mathews) 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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