Ronald A. Kass, MD
NPI 1043215270ActiveIndividual· Internal Medicine, Sleep Medicine· Stockton, CA
Internal Medicine, Sleep Medicine (MD) in Stockton, California, trained at University of California, San Francisco School of Medicine (class of 1980). 788 Medicare patients in 2024, $214,402 paid; nearly all of their 455 Part D prescriptions were generic (98%). Jazz Pharmaceuticals Inc. was the largest of 6 companies reporting payments in 2025, $853.46 in all, mostly food and beverage.
Overview
| NPI | 1043215270 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 15, 2005 |
| Last updated in NPPES | Dec 7, 2022 |
| Certified by provider | Dec 7, 2022 |
| Reactivated | Mar 31, 2006 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Sleep Medicine Primary | 207RS0012X | C42006 | 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) | Enrolled Practitioner - Sleep Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 788 |
|---|---|
| Services billed | 1,425 across 10 procedure codes |
| Paid by Medicare | $214,402 |
Part D prescriptions in 2024
| Prescriptions (claims) | 455 · 734 30-day fills |
|---|---|
| Patients | 104 |
| Total drug cost | $18,822 |
| Generic share | 98% of claims |
Education and affiliations
| Medical school | University of California, San Francisco School of Medicine |
|---|---|
| Graduation year | 1980 |
| Medicare specialty | Sleep Medicine |
| Secondary specialties | Internal Medicine, Pulmonary Disease |
| Telehealth | Offers telehealth |
Medical group
- Pacific Sleep Disorders Center A California General PartnershipStockton, CA · 9 clinicians
Industry payments (Open Payments)
- 2025$853.46 · 28 payments from 6 companies
- 2024$1,187 · 33 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Jazz Pharmaceuticals Inc. | $482.73 | 16 |
| Inspire Medical Systems, Inc. | $155.20 | 3 |
| Harmony Biosciences LLC | $125.86 | 5 |
| Avadel Cns Pharmaceuticals, LLC | $39.04 | 2 |
| Lilly USA, LLC | $27.32 | 1 |
What the 2025 payments were for
- Food and Beverage$663.48 · 26 payments
- Education$189.98 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Sleep Medicine providers in Stockton
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All Internal Medicine, Sleep Medicine providers in California →