Narinder Singh Grewal, MD
NPI 1396783270ActiveIndividual· Pain Medicine, Interventional Pain Medicine· Valencia, CA
Pain Medicine, Interventional Pain Medicine (MD) with Advanced Pain Management Medical Group, practicing in Valencia, California. 124 Medicare patients in 2024, $188,084 paid; nearly all of their 214 Part D prescriptions were generic (95%). Vertex Pharmaceuticals Incorporated was the largest of 3 companies reporting payments in 2025, $83.36 in all, mostly food and beverage.
Overview
| NPI | 1396783270 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jun 3, 2006 |
| Last updated in NPPES | Jan 31, 2024 |
| Certified by provider | Jan 31, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Pain Medicine, Interventional Pain Medicine Primary | 208VP0014X | C42572 | 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 - Pain Management (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 124 |
|---|---|
| Services billed | 1,865 across 29 procedure codes |
| Paid by Medicare | $188,084 |
Part D prescriptions in 2024
| Prescriptions (claims) | 214 · 260 30-day fills |
|---|---|
| Patients | 73 |
| Total drug cost | $10,961 |
| Generic share | 95% of claims |
Education and affiliations
| Graduation year | 1978 |
|---|---|
| Medicare specialty | Pain Management |
| Secondary specialties | Anesthesiology |
| Telehealth | Offers telehealth |
Medical group
- Advanced Pain Management Medical GroupValencia, CA · 2 clinicians
Industry payments (Open Payments)
- 2025$83.36 · 4 payments from 3 companies
- 2024$63.73 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vertex Pharmaceuticals Incorporated | $37.80 | 2 |
| Abbvie Inc. | $31.21 | 1 |
| Medtronic, Inc. | $14.35 | 1 |
What the 2025 payments were for
- Food and Beverage$83.36 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other interventional pain physicians in Valencia
- 1508258559
- 1558268987