Michael Joseph Blumenkrantz, M.D.
NPI 1619984234ActiveIndividual· Internal Medicine, Nephrology· Los Angeles, CA
Internal Medicine, Nephrology (M.D.) in Los Angeles, California, trained at Albert Einstein College of Medicine of Yeshiva University (class of 1968). Their prescriptions cost Medicare Part D more than their services did: $375,985 for 1,526 claims, against $36,016 paid for services in 2024. Ardelyx, Inc. was the largest of 2 companies reporting payments in 2025, $227.61 in all, mostly food and beverage.
Overview
| NPI | 1619984234 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 3, 2006 |
| Last updated in NPPES | Jul 16, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | G17734 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 57 |
|---|---|
| Services billed | 372 across 10 procedure codes |
| Paid by Medicare | $36,016 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,526 · 3,025 30-day fills |
|---|---|
| Patients | 71 |
| Total drug cost | $375,985 |
| Generic share | 74% of claims |
Education and affiliations
| Medical school | Albert Einstein College of Medicine of Yeshiva University |
|---|---|
| Graduation year | 1968 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Nephrology |
Other facilities
- California Healthcare ServicesHome health agency · Hawthorne, CA
Industry payments (Open Payments)
- 2025$227.61 · 7 payments from 2 companies
- 2024$209.98 · 8 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $168.42 | 5 |
| Novartis Pharmaceuticals Corporation | $59.19 | 2 |
What the 2025 payments were for
- Food and Beverage$227.61 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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