DR. DAVID A GRUENBERG (M.D.) – Allergy & Immunology Physician, NPI 1386773422
Allergy & Immunology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
201 ALLERGY/IMMUNOLOGY in MA
Provider Addresses for DR. DAVID A GRUENBERG (M.D.)
200 Sutton St Ste 150
North Andover, MA 018451645
Phone: (978) 689-8890
Fax: (978) 794-1408
Type: Location
505 W Hollis St Ste 108
Nashua, NH 030621386
Phone: (603) 881-7433
Fax: (603) 880-3113
Type: Location
9 VILLAGE SQ
CHELMSFORD, MA 018242712
Phone: (978) 256-4531
Fax: (978) 256-1344
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 11 Open Payments records for all available years, with a total value of $231.
Total Amount is formed as General ($231) + Research ($0) + Ownership ($0) = $231.
Last reported payment date: 2024-08-24 • Largest payer in this snapshot: GlaxoSmithKline, LLC. ($73).
Total Amount
$231
General + Research + Ownership
Payments
11
Total payment records
General Amount
$231
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-08-24
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GlaxoSmithKline, LLC. | $73 |
| ABBVIE INC. | $63 |
| Takeda Pharmaceuticals U.S.A., Inc. | $49 |
| PFIZER INC. | $30 |
| AstraZeneca Pharmaceuticals LP | $16 |
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: 2012-09-05
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20100922001137 | I | Allergy/Immunology | NH | TBD |
| I20120905000009 | I | Allergy/Immunology | MA | 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 | 1,551 | 35 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 333 | 138 | $0 |
| 95024 | Test for allergy using allergenic extract injected into skin | 319 | 25 | $0 |
| 96372 | Injection of drug or substance under skin or into muscle | 278 | 80 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 129 | 73 | $0 |
Insurance plans in this area (ZIP 01845)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ALLERGY/IMMUNOLOGY | MA | 81002 | Urinalysis, manual test | 21 | 12 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| A L L E R G Y/ I M M U N O L O G Y | MA | |
| Allergy/Immunology, Pediatric Medicine | MA | |
| Nurse Practitioner | MA | |
| A L L E R G Y/ I M M U N O L O G Y | MA |
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