Laurence Katznelson, MD
NPI 1013082643ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Los Angeles, CA
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) in Los Angeles, California, trained at University of California, Geffen School of Medicine (class of 1985). Mostly services rather than prescriptions: Medicare paid $3,525 for 43 patients in 2024, with only 38 Part D claims. Ascendis Pharma Endocrinology Inc was the largest of 4 companies reporting payments in 2025, $4,836 in all, mostly consulting fees.
Overview
| NPI | 1013082643 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 21, 2006 |
| Last updated in NPPES | May 7, 2024 |
| Certified by provider | May 7, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | G87279 | CA |
| Internal Medicine | 207R00000X | G87279 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 43 |
|---|---|
| Services billed | 45 across 5 procedure codes |
| Paid by Medicare | $3,525 |
Part D prescriptions in 2024
| Prescriptions (claims) | 38 · 73 30-day fills |
|---|---|
| Total drug cost | $744.77 |
| Generic share | 68% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
Medical group
- Cedars-Sinai Medical CenterWest Hollywood, CA · 799 clinicians
Hospital affiliation
- Cedars-Sinai Medical CenterLos Angeles, CA
Industry payments (Open Payments)
- 2025$4,836 · 4 payments from 4 companies
- 2024$29,301 · 4 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ascendis Pharma Endocrinology Inc | $4,315 | 1 |
| Alexion Pharmaceuticals, Inc. | $450.00 | 1 |
| Corcept Therapeutics | $36.50 | 1 |
| Chiesi USA, Inc. | $34.47 | 1 |
What the 2025 payments were for
- Consulting Fee$4,765 · 2 payments
- Food and Beverage$70.97 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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