Warren Morse Allen, M.D.
NPI 1801850722ActiveIndividual· Pathology, Cytopathology· Santa Monica, CA
Pathology, Cytopathology (M.D.) in Santa Monica, California, trained at University of California, Geffen School of Medicine (class of 1978). Medicare paid $94,878 for services to 677 patients in 2024. Caris Mpi, Inc. was the largest of 2 companies reporting payments in 2025, $43.11 in all, mostly food and beverage.
Overview
| NPI | 1801850722 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 17, 2006 |
| Last updated in NPPES | Sep 11, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Pathology, Cytopathology Primary | 207ZC0500X | G39548 | CA |
| Pathology, Anatomic Pathology & Clinical Pathology | 207ZP0102X | G39548 | 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 - Pathology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 677 |
|---|---|
| Services billed | 2,205 across 32 procedure codes |
| Paid by Medicare | $94,878 |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1978 |
| Medicare specialty | Pathology |
Medical group
- Pathology Medical Group of Saint JohnsSanta Monica, CA · 8 clinicians
Hospital affiliations
- Cedars-Sinai Medical CenterLos Angeles, CA
- Saint John's Health CenterSanta Monica, CA
Industry payments (Open Payments)
- 2025$43.11 · 2 payments from 2 companies
- 2024$34.02 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Caris Mpi, Inc. | $24.82 | 1 |
| Cepheid | $18.29 | 1 |
What the 2025 payments were for
- Food and Beverage$43.11 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records