Matthew Kaptein, M.D.
NPI 1184995094ActiveIndividual· Internal Medicine, Nephrology· Loma Linda, CA
Internal Medicine, Nephrology (M.D.) in Loma Linda, California, trained at University of Southern California Keck School of Medicine (class of 2011). Their prescriptions cost Medicare Part D more than their services did: $230,303 for 1,044 claims, against $104,075 paid for services in 2024. Calliditas Therapeutics US Inc. was the largest of 2 companies reporting payments in 2025, $150.04 in all, mostly food and beverage.
Overview
| NPI | 1184995094 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jan 24, 2012 |
| Last updated in NPPES | Dec 20, 2023 |
| Certified by provider | Dec 20, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A125084 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 306 |
|---|---|
| Services billed | 1,054 across 20 procedure codes |
| Paid by Medicare | $104,075 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,044 · 2,078 30-day fills |
|---|---|
| Patients | 178 |
| Total drug cost | $230,303 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Faculty Physicians and Surgeons of LlusmLoma Linda, CA · 1,315 clinicians
- Sac Health SystemSan Bernardino, CA · 227 clinicians
Hospital affiliation
- Loma Linda University Medical CenterLoma Linda, CA
Other facilities
- Fkc Colton HomeDialysis facility · Colton, CA
- Rai - West C - ColtonDialysis facility · Colton, CA
Industry payments (Open Payments)
- 2025$150.04 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Calliditas Therapeutics US Inc. | $126.89 | 1 |
| Fresenius USA Marketing, Inc. | $23.15 | 1 |
What the 2025 payments were for
- Food and Beverage$150.04 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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