John Ks Chia, MD
NPI 1801876412ActiveIndividual· Internal Medicine, Infectious Disease· Torrance, CA
Internal Medicine, Infectious Disease (MD) in Torrance, California, trained at University of California, Geffen School of Medicine (class of 1979). Their prescriptions cost Medicare Part D more than their services did: $223,509 for 1,725 claims, against $58,066 paid for services in 2024. Shionogi Inc reported $19.78 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1801876412 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 19, 2006 |
| Last updated in NPPES | Apr 11, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | G43168 | CA |
| Internal Medicine | 207R00000X | G43168 | 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 - Infectious Disease (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 207 |
|---|---|
| Services billed | 605 across 19 procedure codes |
| Paid by Medicare | $58,066 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,725 · 2,800 30-day fills |
|---|---|
| Patients | 216 |
| Total drug cost | $223,509 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1979 |
| Medicare specialty | Infectious Disease |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Id Med A Medical CorporationTorrance, CA · 5 clinicians
Hospital affiliation
- Torrance Memorial Medical CenterTorrance, CA
Industry payments (Open Payments)
- 2025$19.78 · 1 payment from 1 company
- 2024$328.65 · 8 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Shionogi Inc | $19.78 | 1 |
What the 2025 payments were for
- Food and Beverage$19.78 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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