Medicare Enrolled
Dr. Glenn Littenberg, M.D.
Gastroenterology · Pasadena, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Speaking/Promotional
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. Littenberg 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. Littenberg?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Littenberg
Dr. Glenn Littenberg is a gastroenterology specialist in Pasadena, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Littenberg performed 1,671 Medicare services across 747 unique beneficiaries.
Between the years covered by Open Payments, Dr. Littenberg received a total of $159,130 from 53 pharmaceutical and/or device companies across 1151 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in gastroenterology. The majority of payments are for speaking programs and promotional activities, reflecting participation in industry-sponsored events. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Littenberg 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 14% volume in CA
$159,130 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,671
Medicare services
Top 14% in CA for gastroenterology
747
Unique beneficiaries
$72
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~84 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 |
|---|---|---|---|
| Chronic care management, additional 20 min/month This service covers an extra 20 minutes of clinical staff time directed by a healthcare professional for managing two or more chronic conditions each calendar month. |
640 | $40 | $240 |
| Chronic care management, first 20 min/month This service covers the first 20 minutes of clinical staff time directed by a healthcare professional each calendar month to manage chronic conditions. |
364 | $52 | $300 |
| 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. |
112 | $101 | $600 |
| 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. |
91 | $224 | $1,094 |
| 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. |
91 | $71 | $440 |
| 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. |
60 | $189 | $784 |
| 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. |
54 | $3 | $35 |
| 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. |
35 | $91 | $540 |
| Liver stiffness measurement A non-invasive test that uses ultrasound or similar technology to measure the stiffness of liver tissue. This measurement helps assess the degree of liver fibrosis or scarring. |
34 | $23 | $160 |
| 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. |
33 | $133 | $840 |
| Colonoscopy for colorectal cancer screening A colonoscopy performed to screen for colorectal cancer in individuals who are not at high risk for the disease. |
28 | $192 | $792 |
| 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. |
26 | $76 | $591 |
| Upper endoscopy (EGD) A diagnostic exam of the esophagus, stomach, and upper small bowel using a flexible endoscope. |
25 | $73 | $549 |
| 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. |
19 | $126 | $780 |
| 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. |
17 | $145 | $865 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
16 | $65 | $444 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
15 | $73 | $440 |
| 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. |
11 | $113 | $740 |
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 ↗$159,130
Total received (2018-2024)
Avg $22,733/year across 7 years
Top 3% in CA for gastroenterology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
53
Companies
1,151
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.
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$128,098 (80.5%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$17,324 (10.9%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$13,708 (8.6%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$19,391
2023
$27,800
2022
$27,798
2021
$27,022
2020
$26,241
2019
$19,946
2018
$10,932
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
ABBVIE INC.
$16,617
Janssen Biotech, Inc.
$534
Phathom Pharmaceuticals, Inc.
$485
Celltrion USA Inc.
$222
PFIZER INC.
$206
AIMMUNE THERAPEUTICS, INC.
$186
Celgene Corporation
$157
Lilly USA, LLC
$151
Ferring Pharmaceuticals Inc.
$126
E.R. Squibb & Sons, L.L.C.
$118
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$113
Takeda Pharmaceuticals U.S.A., Inc.
$96
Boston Scientific Corporation
$95
Gilead Sciences, Inc.
$85
GENZYME CORPORATION
$62
QOL Medical, LLC
$56
Merck Sharp & Dohme LLC
$51
Organon Llc
$32
Top 3 companies account for 90.9% of 2024 payments
All-time payments by company (2018-2024) ›
ABBVIE INC.
$60,008
AbbVie Inc.
$43,371
AbbVie, Inc.
$21,531
Boston Scientific Corporation
$14,566
Janssen Biotech, Inc.
$3,089
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$1,950
Takeda Pharmaceuticals U.S.A., Inc.
$1,947
BOSTON SCIENTIFIC CORPORATION
$1,500
PFIZER INC.
$1,358
Gilead Sciences, Inc.
$980
Janssen Scientific Affairs, LLC
$837
E.R. Squibb & Sons, L.L.C.
$806
Mahana Therapeutics, Inc.
$700
RedHill Biopharma Inc.
$649
QOL Medical, LLC
$582
Phathom Pharmaceuticals, Inc.
$507
Celgene Corporation
$369
Merck Sharp & Dohme LLC
$360
GENZYME CORPORATION
$321
Intercept Pharmaceuticals, Inc.
$269
Shire North American Group Inc
$244
Merck Sharp & Dohme Corporation
$242
Celltrion USA Inc.
$222
Ardelyx, Inc.
$218
Lilly USA, LLC
$205
AIMMUNE THERAPEUTICS, INC.
$186
Ferring Pharmaceuticals Inc.
$179
Ironwood Pharmaceuticals, Inc
$174
Regeneron Healthcare Solutions, Inc.
$167
Allergan Inc.
$141
PORTOLA PHARMACEUTICALS, INC.
$124
Alexion Pharmaceuticals, Inc.
$123
Concordia Pharmaceuticals Inc.
$115
Eisai Inc.
$112
Ethicon Inc.
$109
Fresenius Kabi USA, LLC
$90
ERBE USA Inc
$74
UCB, Inc.
$72
Nestle HealthCare Nutrition Inc.
$70
Braintree Laboratories, Inc.
$70
Covidien LP
$61
IRONWOOD PHARMACEUTICALS, INC
$59
Prometheus Laboratories Inc.
$51
Lucid Diagnostics Inc.
$49
Allergan, Inc.
$42
Aries Pharmaceuticals, Inc.
$38
VIVUS, Inc.
$36
Organon Llc
$32
Boehringer Ingelheim Pharmaceuticals, Inc.
$32
Medtronic, Inc.
$25
INTERCEPT PHARMACEUTICALS, INC.
$24
Evoke Pharma, Inc.
$21
Alfasigma USA, Inc.
$20
Top 3 companies account for 78.5% of all-time payments
Associated products mentioned in payments ›
APRISO · Amitiza · Apollo ESG NXT System · Axios · BEVYXXA · CLENPIQ · CREON · CYLTEZO · Cimzia · Creon · DIFICID · DUPIXENT · Donnatal · ELEVIEW · ENTYVIO · ERBE · Entyvio · Epclusa · GATTEX · GENERAL BILIARY DEVICES · GENERAL BIOPSY · GENERAL - BILIARY DEVICES · GENERAL - THERAPIES · GENERAL BIOPSY · GENERAL THERAPIES · GI Genius · GIMOTI · General - Therapies · HADLIMA · HUMIRA · Humira · IBSRELA · IDACIO · INFLECTRA · LINX Reflux Management System · LINZESS · Lenvima · Linzess · MAVYRET · MOTEGRITY · Mavyret · Movantik · OCALIVA · OMVOH · PANCREAZE · REBYOTA · REMICADE · RENFLEXIS · RINVOQ · SKYRIZI · STELARA · SUCRAID · SUPREP · SUPREP BOWEL PREP · SUTAB · Smart Pill · Spotlight · Sucraid · TREMFYA · TRULANCE · Talicia · VEGZELMA · VELSIPITY · VIBERZI · VOQUEZNA · VOWST · Vemlidy · XELJANZ · XIFAXAN · XIFIXAN · ZENPEP · ZEPOSIA · ZYMFENTRA · Zelnorm
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 (80%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in gastroenterology and does not inherently indicate bias, but patients may wish to be aware. Total industry engagement is in the top 3% for gastroenterology in CA.
Geographic Context
Gastroenterologists within 10 mi
464
Per 100K population
4.7
County median income
$87,760
Nearest hospital
GLENDALE ADVENTIST MEDICAL CENTER
3.1 mi
3.1 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. Littenberg is a clinical cardiology specialist, with above-average Medicare volume (top 14% in CA), with speaking/promotional industry engagement in the top 3% 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. Littenberg experienced with chronic care management, additional 20 min/month?
Based on Medicare claims data, Dr. Littenberg performed 640 chronic care management, additional 20 min/month 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. Littenberg receive payments from pharmaceutical companies?
Yes. Dr. Littenberg received a total of $159,130 from 53 companies across 1,151 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. Littenberg's costs compare to other gastroenterologists in Pasadena?
Dr. Littenberg's average Medicare payment per service is $72. 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. Littenberg) 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 →
Explore related providers
Specialty guide
Understanding Gastroenterology
Common procedures, typical costs, and what industry payments mean in gastroenterology.
Same specialty & city
Gastroenterologists in Pasadena
Browse gastroenterologists in Pasadena ranked by procedure volume and transparency data.
Highest volume
Top Gastroenterologists in CA
Gastroenterologists ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Gastroenterologists in CA
Which CA gastroenterologists receive the most from drug and device companies.
By company
ABBVIE INC. Payments to Doctors
See all physicians who received payments from ABBVIE INC.
By company
AbbVie Inc. Payments to Doctors
See all physicians who received payments from AbbVie Inc.
By company
AbbVie, Inc. Payments to Doctors
See all physicians who received payments from AbbVie, Inc.
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.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology