Hamsa N. Subramanian, M.D.
NPI 1154370203ActiveIndividual· Allergy & Immunology· Saint Louis, MO
Allergy & Immunology (M.D.) with Signature Medical Group Inc, practicing in Saint Louis, Missouri. Their prescriptions cost Medicare Part D more than their services did: $989,653 for 1,526 claims, against $139,941 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 10 companies reporting payments in 2025, $378.81 in all, mostly food and beverage. Lists Barnes Jewish Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1154370203 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 8, 2006 |
| Last updated in NPPES | Mar 16, 2021 |
| Certified by provider | Mar 16, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | 107809 | MO |
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 - Allergy/Immunology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 233 |
|---|---|
| Services billed | 8,134 across 42 procedure codes |
| Paid by Medicare | $139,941 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,526 · 2,711 30-day fills |
|---|---|
| Patients | 301 |
| Total drug cost | $989,653 |
| Generic share | 69% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Allergy/Immunology |
| Telehealth | Offers telehealth |
Medical group
- Signature Medical Group IncSaint Louis, MO · 41 clinicians
Hospital affiliations
- Barnes Jewish HospitalSaint Louis, MO
- Mercy Hospital St LouisSaint Louis, MO
- Missouri Baptist Medical CenterSaint Louis, MO
Industry payments (Open Payments)
- 2025$378.81 · 17 payments from 10 companies
- 2024$316.88 · 13 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $106.42 | 1 |
| Astrazeneca Pharmaceuticals LP | $54.81 | 3 |
| Csl Behring | $44.46 | 3 |
| Pfizer Inc. | $38.75 | 2 |
| Genzyme Corporation | $38.44 | 2 |
What the 2025 payments were for
- Food and Beverage$334.10 · 15 payments
- Education$34.00 · 1 payment
- Consulting Fee$10.71 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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