Ka Ling (Karin) Cheung, M.D.
NPI 1881643831ActiveIndividual· Internal Medicine, Pulmonary Disease· Walnut Creek, CA
Internal Medicine, Pulmonary Disease (M.D.) with Bass Medical Group, practicing in Walnut Creek, California. Their prescriptions cost Medicare Part D more than their services did: $570,130 for 847 claims, against $221,199 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 22 companies reporting payments in 2025, $3,061 in all, mostly food and beverage. Lists John Muir Medical Center - Concord Campus and 1 other hospital as hospital affiliations.
Overview
| NPI | 1881643831 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 8, 2006 |
| Last updated in NPPES | Dec 2, 2024 |
| Certified by provider | Dec 2, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | C51289 | CA |
| Internal Medicine, Sleep Medicine | 207RS0012X | C51289 | CA |
| Internal Medicine, Critical Care Medicine | 207RC0200X | C51289 | 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 - Pulmonary Disease (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 576 |
|---|---|
| Services billed | 1,865 across 22 procedure codes |
| Paid by Medicare | $221,199 |
Part D prescriptions in 2024
| Prescriptions (claims) | 847 · 1,374 30-day fills |
|---|---|
| Patients | 171 |
| Total drug cost | $570,130 |
| Generic share | 44% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Sleep Medicine |
| Telehealth | Offers telehealth |
Medical group
- Bass Medical GroupChico, CA · 291 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$3,061 · 120 payments from 22 companies
- 2024$3,021 · 131 payments from 24 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $453.62 | 20 |
| Astrazeneca Pharmaceuticals LP | $452.96 | 21 |
| Inspire Medical Systems, Inc. | $429.85 | 11 |
| Jazz Pharmaceuticals Inc. | $242.06 | 7 |
| Grifols USA, LLC | $163.09 | 5 |
What the 2025 payments were for
- Food and Beverage$2,819 · 116 payments
- Education$242.35 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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