HAMSA N SUBRAMANIAN (M.D.) – Allergy & Immunology Physician, NPI 1154370203
Allergy & Immunology Physician
Main info
Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
115 ALLERGY/IMMUNOLOGY in MO
Provider Addresses for HAMSA N SUBRAMANIAN (M.D.)
425 N NEW BALLAS RD STE 203
SAINT LOUIS, MO 631416814
Phone: (314) 872-3104
Fax: (314) 994-7105
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 27 Open Payments records for all available years, with a total value of $543.
Total Amount is formed as General ($543) + Research ($0) + Ownership ($0) = $543.
Last reported payment date: 2024-12-13 • Largest payer in this snapshot: GlaxoSmithKline, LLC. ($203).
Total Amount
$543
General + Research + Ownership
Payments
27
Total payment records
General Amount
$543
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-13
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GlaxoSmithKline, LLC. | $203 |
| AstraZeneca Pharmaceuticals LP | $92 |
| GENZYME CORPORATION | $69 |
| Takeda Pharmaceuticals U.S.A., Inc. | $66 |
| PFIZER INC. | $33 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-01-28
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050128000797 | I | Allergy/Immunology | MO | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 95004 | Test for allergy using allergenic extract | 2,107 | 52 | $0 |
| 95044 | Test for allergy using skin patch | 354 | 13 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 200 | 127 | $0 |
| 95165 | Professional service for preparation and provision of 1 or more antigens | 186 | 16 | $0 |
| 95117 | Professional service for multiple injections of allergen | 183 | 19 | $0 |
Insurance plans in this area (ZIP 63141)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ALLERGY/IMMUNOLOGY | MO | 95004 | Injection of allergenic extracts into skin, accessed through the skin | 3390 | 82 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Orthopedic Surgery | MO | |
| Nurse Practitioner | MO | |
| Orthopedic Surgery, Hand Surgery | NY | |
| Physical Medicine And Rehabilitation | MO | |
| Physical Therapist In Private Practice | MO | |
| Orthopedic Surgery | MO | |
| Nurse Practitioner | MO | |
| Nurse Practitioner | MO | |
| - | MO | |
| Physical Therapist In Private Practice | MO |
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