Tom-Oliver Klein, MD
NPI 1235161787ActiveIndividual· Internal Medicine· Chula Vista, CA
Internal Medicine (MD) with Inpatient Medicine Services LLC, practicing in Chula Vista, California. 296 Medicare patients in 2024, $116,822 paid; nearly all of their 323 Part D prescriptions were generic (91%). Janssen Biotech, Inc. reported $273.16 in payments in 2025, mostly food and beverage. Lists Adventist Health Castle and 1 other hospital as hospital affiliations.
Overview
| NPI | 1235161787 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 7, 2006 |
| Last updated in NPPES | Jun 24, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | C53959 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (HI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 296 |
|---|---|
| Services billed | 1,159 across 10 procedure codes |
| Paid by Medicare | $116,822 |
Part D prescriptions in 2024
| Prescriptions (claims) | 323 · 331 30-day fills |
|---|---|
| Patients | 179 |
| Total drug cost | $16,856 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Inpatient Medicine Services LLCKailua, HI · 10 clinicians
Hospital affiliations
- Adventist Health CastleKailua, HI
- Straub Clinic and HospitalHonolulu, HI
Other facilities
- Bristol Hospice - Hawaii, LLCHospice · Honolulu, HI
Industry payments (Open Payments)
- 2025$273.16 · 2 payments from 1 company
- 2024$121.72 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $273.16 | 2 |
What the 2025 payments were for
- Food and Beverage$273.16 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 111 internal medicine physicians in Chula Vista · All internal medicine physicians in California