Atam Bir Singh, M.D.
NPI 1548271166ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Riverside, CA
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) with Centric Health, practicing in Riverside, California. Their prescriptions cost Medicare Part D more than their services did: $1,683,989 for 4,782 claims, against $310,136 paid for services in 2024. Novo Nordisk Inc was the largest of 22 companies reporting payments in 2025, $1,450 in all, mostly food and beverage. Lists Adventist Health Bakersfield and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1548271166 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 10, 2006 |
| Last updated in NPPES | Oct 2, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | A66788 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,015 |
|---|---|
| Services billed | 4,353 across 34 procedure codes |
| Paid by Medicare | $310,136 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,782 · 7,579 30-day fills |
|---|---|
| Patients | 562 |
| Total drug cost | $1,683,989 |
| Generic share | 45% of claims |
Education and affiliations
| Graduation year | 1974 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Endocrinology |
| Telehealth | Offers telehealth |
Medical group
- Centric HealthBakersfield, CA · 68 clinicians
Hospital affiliations
- Adventist Health BakersfieldBakersfield, CA
- Adventist Health DelanoDelano, CA
- Adventist Health Tehachapi ValleyTehachapi, CA
- Bakersfield Memorial HospitalBakersfield, CA
Industry payments (Open Payments)
- 2025$1,450 · 65 payments from 22 companies
- 2024$1,107 · 53 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $270.63 | 14 |
| Amgen Inc. | $187.22 | 8 |
| Abbvie Inc. | $150.12 | 7 |
| Novartis Pharmaceuticals Corporation | $119.36 | 5 |
| Lilly USA, LLC | $102.66 | 5 |
What the 2025 payments were for
- Food and Beverage$1,408 · 64 payments
- Education$42.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other endocrinologists in Riverside
- 1093240178
- 1093894941
- 1497862684
- 1568428134
- 1649341553
- 1669856688
- 1629630652
- 1376984351
- 1740262674
- 1295419182
- 1881753549