Elizabeth Joanne Herskovits Castillo, MD PHD
NPI 1932176443ActiveIndividual· Internal Medicine, Geriatric Medicine· Boston, MA
Internal Medicine, Geriatric Medicine (MD PHD) in Boston, Massachusetts, trained at University of California, San Francisco School of Medicine (class of 2002). 135 Medicare patients in 2024, $58,982 paid; nearly all of their 1,798 Part D prescriptions were generic (98%).
Overview
| NPI | 1932176443 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD PHD |
| Sole proprietor | No |
| NPI issued | Mar 2, 2006 |
| Last updated in NPPES | Feb 9, 2026 |
| Certified by provider | Feb 9, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Geriatric Medicine Primary | 207RG0300X | MD22347 | ME |
| Hospitalist | 208M00000X | 2006-01812 | NC |
| Internal Medicine, Geriatric Medicine | 207RG0300X | 2006-01812 | NC |
| Internal Medicine | 207R00000X | 2006-01812 | NC |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Geriatric Medicine (MA); Practitioner - Hospitalist (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 135 |
|---|---|
| Services billed | 961 across 8 procedure codes |
| Paid by Medicare | $58,982 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,798 · 3,289 30-day fills |
|---|---|
| Patients | 200 |
| Total drug cost | $55,013 |
| Generic share | 98% of claims |
Education and affiliations
| Medical school | University of California, San Francisco School of Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Geriatric Medicine |
| Secondary specialties | Internal Medicine |
Medical group
- Massachusetts General Physicians Organization IncBoston, MA · 3,558 clinicians
Hospital affiliations
- Beth Israel Deaconess Medical CenterBoston, MA
- Brigham and Women's HospitalBoston, MA
- Cape Cod HospitalHyannis, MA
- Falmouth HospitalFalmouth, MA
Other facilities
- Spaulding Rehabilitation Hospital - Cape CodInpatient rehabilitation facility · East Sandwich, MA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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