Medicare Enrolled
Dr. David Maddock, M.D.
Gastroenterology · Fall River, MA
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. Maddock 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. Maddock
Dr. David Maddock is a gastroenterology specialist in Fall River, MA, with 21 years of NPI registration. Based on federal Medicare data, Dr. Maddock performed 4,056 Medicare services across 3,408 unique beneficiaries.
Between the years covered by Open Payments, Dr. Maddock received a total of $4,526 from 35 pharmaceutical and/or device companies across 257 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. Maddock 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.
✓ 21 years in practice
▲ Top 1% volume in MA
$4,526 industry payments
Medicare Practice Summary
Medicare Utilization ↗4,056
Medicare services
Top 1% in MA for gastroenterology
3,408
Unique beneficiaries
$42
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~193 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 |
|---|---|---|---|
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
649 | $8 | $17 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
397 | $8 | $26 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
377 | $10 | $36 |
| Iron level test | 266 | $6 | $22 |
| Iron binding capacity test A blood test that measures the amount of iron in the blood and the blood's ability to bind and transport iron. |
266 | $9 | $30 |
| Prothrombin time test (blood clotting) A laboratory test that measures how long it takes for blood to clot. This procedure evaluates the body's coagulation process. |
265 | $4 | $30 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
263 | $13 | $46 |
| Direct bilirubin level test A blood test that measures the amount of direct bilirubin in your body. Direct bilirubin is the form of the waste product processed by the liver. |
177 | $5 | $17 |
| 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. |
135 | $67 | $250 |
| Hepatitis A antibody test A blood test that measures the level of antibodies to the hepatitis A virus in your body. This test helps determine if you have been exposed to the virus or if you have immunity from vaccination. |
96 | $12 | $42 |
| 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. |
87 | $387 | $1,220 |
| 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. |
81 | $245 | $1,350 |
| Hepatitis B screening for high-risk individuals This screening test for high-risk, non-pregnant individuals includes testing for hepatitis B surface antigen, antibodies to surface antigen, and antibodies to core antigen. A neutralizing confirmatory test is performed when necessary. |
68 | $28 | $95 |
| 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. |
63 | $89 | $370 |
| Helicobacter pylori breath test A diagnostic test that analyzes a patient's breath to detect the presence of Helicobacter pylori bacteria. This procedure is used to identify infections associated with the stomach and upper digestive tract. |
62 | $65 | $225 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
59 | $16 | $58 |
| 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. |
56 | $306 | $2,751 |
| Hepatitis C antibody test A blood test that checks for antibodies to the hepatitis C virus. This test helps determine if a person has been exposed to the virus. |
53 | $14 | $48 |
| Helicobacter pylori drug administration This procedure involves the administration of a medication specifically used to treat Helicobacter pylori infection. |
52 | $8 | $27 |
| 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. |
44 | $182 | $1,850 |
| 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. |
44 | $118 | $522 |
| Acute hepatitis panel A blood test that screens for markers of acute viral hepatitis infection. |
43 | $47 | $159 |
| Blood glucose test using hand-held instrument A test that measures the level of sugar in the blood using a portable device. The result helps monitor blood glucose levels. |
43 | $3 | $34 |
| Colonoscopy A diagnostic exam of the large bowel using a flexible endoscope to visualize the interior of the colon. |
41 | $195 | $1,434 |
| Liver function blood test panel | 41 | $8 | $28 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
41 | $15 | $51 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
32 | $29 | $99 |
| Red blood cell concentration measurement A laboratory test that measures the concentration of red blood cells in the blood. |
31 | $2 | $8 |
| Hemoglobin blood test A blood test that measures the amount of hemoglobin, the protein in red blood cells that carries oxygen. |
31 | $2 | $8 |
| Hydrogen breath test A test that measures hydrogen levels in your breath to help evaluate stomach and bowel symptoms. |
31 | $66 | $245 |
| Balloon dilation of esophagus, stomach, or upper small bowel, less than 3.0 cm A procedure using a flexible endoscope to widen a narrowed section of the esophagus, stomach, or upper small bowel with a balloon that is less than 3.0 cm in length. |
19 | $907 | $1,790 |
| Colonoscopy for colorectal cancer screening A colonoscopy performed to screen for colorectal cancer in individuals who are not at high risk for the disease. |
19 | $305 | $2,751 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
18 | $14 | $50 |
| C-reactive protein test (inflammation marker) A blood test that measures the level of C-reactive protein to detect the presence of infection or inflammation in the body. |
17 | $5 | $18 |
| Lipase level test A blood test that measures the amount of lipase, a fat-digesting enzyme, in your body. |
16 | $7 | $23 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
16 | $8 | $31 |
| Hepatitis B core antibody (IgM) test A blood test that measures the level of IgM antibodies to the hepatitis B core antigen. This test is used to help determine if a person has a recent or acute hepatitis B infection. |
16 | $12 | $40 |
| Upper endoscopy (EGD) A diagnostic exam of the esophagus, stomach, and upper small bowel using a flexible endoscope. |
15 | $153 | $1,050 |
| 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. |
15 | $65 | $345 |
| Sed rate test (inflammation marker) This automated test measures how quickly red blood cells settle in a tube to detect inflammation in the body. |
11 | $3 | $9 |
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 ↗$4,526
Total received (2018-2024)
Avg $647/year across 7 years
Top 25% in MA for gastroenterology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
35
Companies
257
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
$4,526 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$337
2023
$958
2022
$109
2021
$17
2020
$636
2019
$1,359
2018
$1,110
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
ABBVIE INC.
$213
Celgene Corporation
$37
Sumitomo Pharma America, Inc.
$25
Takeda Pharmaceuticals U.S.A., Inc.
$24
Phathom Pharmaceuticals, Inc.
$22
IRONWOOD PHARMACEUTICALS, INC
$17
Top 3 companies account for 81.4% of 2024 payments
All-time payments by company (2018-2024) ›
Takeda Pharmaceuticals U.S.A., Inc.
$580
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$517
PFIZER INC.
$502
AbbVie, Inc.
$426
ABBVIE INC.
$416
Janssen Biotech, Inc.
$313
Janssen Scientific Affairs, LLC
$164
UCB, Inc.
$157
E.R. Squibb & Sons, L.L.C.
$118
Neurocrine Biosciences, Inc.
$116
AbbVie Inc.
$112
Gilead Sciences, Inc.
$103
Intuitive Surgical, Inc.
$98
Ironwood Pharmaceuticals, Inc
$93
Sumitomo Pharma America, Inc.
$90
Merck Sharp & Dohme Corporation
$90
Allergan Inc.
$85
IRONWOOD PHARMACEUTICALS, INC
$75
Nestle HealthCare Nutrition Inc.
$67
GENZYME CORPORATION
$64
Celgene Corporation
$63
Shire North American Group Inc
$39
Prometheus Laboratories Inc.
$27
Phathom Pharmaceuticals, Inc.
$22
Concordia Pharmaceuticals Inc.
$21
Romark Laboratories, LC
$20
Organon LLC
$19
Ardelyx, Inc.
$19
INTERCEPT PHARMACEUTICALS, INC.
$19
Alfasigma USA, Inc.
$18
Daiichi Sankyo Inc.
$17
Synergy Pharmaceuticals Inc
$16
Intercept Pharmaceuticals, Inc.
$16
Braintree Laboratories, Inc.
$12
Otsuka America Pharmaceutical, Inc.
$12
Top 3 companies account for 35.3% of all-time payments
Associated products mentioned in payments ›
Alinia · Amitiza · BREATHTEK · CREON · Cimzia · Creon · DIFICID · DONNATAL · DUPIXENT · Da Vinci Surgical System · Dexilant · ENTYVIO · Entyvio · GATTEX · HUMIRA · Humira · IBSRELA · INFLECTRA · INGREZZA · INJECTAFER · LINZESS · Linzess · MOTEGRITY · MOTOFEN · MYFEMBREE · Mavyret · Motegrity · NEXPLANON · OCALIVA · RELISTOR · REMICADE · RENFLEXIS · RINVOQ · SKYRIZI · STELARA · TRULANCE · Trulance · UCERIS · VIBERZI · VOQUEZNA · XELJANZ · XIFAXAN · ZENPEP · 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
104
Per 100K population
18.0
County median income
$84,198
Nearest hospital
SAINT ANNE'S 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. Maddock is a mixed practice specialist, with above-average Medicare volume (top 1% in MA), with low-engagement industry engagement, with 21 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. Maddock experienced with blood draw (venipuncture)?
Based on Medicare claims data, Dr. Maddock performed 649 blood draw (venipuncture) 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. Maddock receive payments from pharmaceutical companies?
Yes. Dr. Maddock received a total of $4,526 from 35 companies across 257 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. Maddock's costs compare to other gastroenterologists in Fall River?
Dr. Maddock's average Medicare payment per service is $42. 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. Maddock) 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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