STEVEN GRUENSTEIN (M.D.) – Hematology & Oncology Physician, NPI 1407855307
Hematology & Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,164 HEMATOLOGY/ONCOLOGY in NY
Provider Addresses for STEVEN GRUENSTEIN (M.D.)
12 E 86TH ST OFC 4
NEW YORK, NY 100280517
Phone: (212) 861-6660
Fax: (212) 744-4696
Type: Location
1500 ROUTE 112 BLDG 4
PORT JEFFERSON STATION, NY 117768055
Phone: (631) 751-3000
Fax: (631) 509-6559
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 20 Open Payments records for all available years, with a total value of $481.
Total Amount is formed as General ($481) + Research ($0) + Ownership ($0) = $481.
Last reported payment date: 2024-09-27 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($141).
Total Amount
$481
General + Research + Ownership
Payments
20
Total payment records
General Amount
$481
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-09-27
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2006-03-23
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 |
|---|---|---|---|---|
| I20060323000785 | I | Hematology/Oncology | NY | 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 |
|---|---|---|---|---|
| J1439 | Injection, ferric carboxymaltose, 1 mg | 80,250 | 78 | $0 |
| J0881 | Injection, darbepoetin alfa, 1 microgram (non-esrd use) | 16,400 | 17 | $0 |
| 88185 | Flow cytometry technique for dna or cell analysis, each additional marker | 8,879 | 301 | $0 |
| J0897 | Injection, denosumab, 1 mg | 7,440 | 61 | $0 |
| J1756 | Injection, iron sucrose, 1 mg | 6,801 | 19 | $0 |
Insurance plans in this area (ZIP 10028)
Loading plans...
Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| HEMATOLOGY/ONCOLOGY | NY | 85610 | Blood test, clotting time | 264 | 34 |
| HEMATOLOGY/ONCOLOGY | NY | 96375 | Injection of different drug or substance into a vein for therapy, diagnosis, or prevention | 111 | 25 |
| HEMATOLOGY/ONCOLOGY | NY | 96415 | Infusion of chemotherapy into a vein | 320 | 26 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | NY | |
| - | NY | |
| U R O L O G Y | NY | |
| General Surgery | NJ | |
| O B S T E T R I C S/ G Y N E C O L O G Y | NY | |
| Physician Assistant | NY | |
| U R O L O G Y | NY | |
| H E M A T O L O G Y/ O N C O L O G Y | NY | |
| - | NY | |
| - | NY |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.