Glenn David Littenberg, M.D.
NPI 1033184973ActiveIndividual· Internal Medicine, Gastroenterology· Pasadena, CA
Internal Medicine, Gastroenterology (M.D.) in Pasadena, California, licensed in CA, with an NPI issued in February 2006. Their prescriptions cost Medicare Part D more than their services did: $737,177 for 1,229 claims, against $143,499 paid for services in 2024. Abbvie Inc. was the largest of 11 companies reporting payments in 2025, $13,373 in all, mostly speaking and faculty fees.
Overview
| NPI | 1033184973 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 22, 2006 |
| Last updated in NPPES | Apr 18, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | G27849 | CA |
| Internal Medicine, Hepatology | 207RI0008X | G27849 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 498 |
|---|---|
| Services billed | 2,238 across 44 procedure codes |
| Paid by Medicare | $143,499 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,229 · 2,605 30-day fills |
|---|---|
| Patients | 364 |
| Total drug cost | $737,177 |
| Generic share | 84% of claims |
Industry payments (Open Payments)
- 2025$13,373 · 40 payments from 11 companies
- 2024$19,391 · 153 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $12,337 | 17 |
| Janssen Biotech, Inc. | $283.65 | 9 |
| Novo Nordisk Inc | $147.77 | 2 |
| Regeneron Healthcare Solutions, Inc. | $125.00 | 1 |
| Aimmune Therapeutics, Inc. | $124.99 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$11,500 · 5 payments
- Food and Beverage$1,873 · 35 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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