Shahid N. Siddiqui, MD
NPI 1639276140ActiveIndividual· Internal Medicine· Lancaster, CA
Internal Medicine (MD) with Acute Care Associates of California PC, practicing in Lancaster, California. Their prescriptions cost Medicare Part D more than their services did: $183,195 for 2,387 claims, against $77,344 paid for services in 2024. Shionogi Inc was the largest of 3 companies reporting payments in 2025, $238.71 in all, mostly food and beverage. Lists Palmdale Regional Medical Center as a hospital affiliation.
Overview
| NPI | 1639276140 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 19, 2006 |
| Last updated in NPPES | Mar 17, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A94134 | CA |
| Internal Medicine | 207R00000X | 35650 | AZ |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 316 |
|---|---|
| Services billed | 1,043 across 13 procedure codes |
| Paid by Medicare | $77,344 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,387 · 2,445 30-day fills |
|---|---|
| Patients | 200 |
| Total drug cost | $183,195 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Acute Care Associates of California PCMurrieta, CA · 55 clinicians
Hospital affiliation
- Palmdale Regional Medical CenterPalmdale, CA
Other facilities
- Blue Sky Home Health Care, IncHome health agency · Van Nuys, CA
- Dependable Home Health, IncHome health agency · Mojave, CA
- The Ellison John Transitional Care CenterNursing home · Lancaster, CA
Industry payments (Open Payments)
- 2025$238.71 · 3 payments from 3 companies
- 2024$172.36 · 6 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Shionogi Inc | $124.67 | 1 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $90.97 | 1 |
| W. L. Gore & Associates, Inc. | $23.07 | 1 |
What the 2025 payments were for
- Food and Beverage$238.71 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 79 internal medicine physicians in Lancaster · All internal medicine physicians in California