Doctor profile · Federal record
Dr. Steven Gruenstein, M.D.
Hematology & Oncology Physician (CMS: Hematology/Oncology) · New York, NY
- NPI 1407855307
- Accepts Medicare
- MIPS 99.2 / 100 · 2023
- 42 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
12 E 86Th St Ofc 4
New York, NY 100280517
(212) 861-6660
fax (212) 744-4696 - Mailing address
-
1500 Route 112 Bldg 4
Port Jefferson Station, NY 117768055
Credentials & registration
- NPI registered
- July 2005 — 21 yrs on file
- Profile last updated
- January 17, 2020
- Year of graduation
- 1984 — 42 yrs since
- Specialty taxonomy
- 207RH0003X — NUCC code
- State license (1)
- New York #1776051
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1407855307. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
156,078
Distinct HCPCS
10
Medicare allowed
$1,481,204
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J1439 |
Injection, ferric carboxymaltose, 1 mg | 80,250 | 78 | $1 | |
J0881 |
Injection, darbepoetin alfa, 1 microgram (non-esrd use) | 16,400 | 17 | $3 | |
88185 |
Flow cytometry technique for dna or cell analysis, each additional marker | 8,879 | 301 | $29 | |
J0897 |
Injection, denosumab, 1 mg | 7,440 | 61 | $23 | |
J1756 |
Injection, iron sucrose, 1 mg | 6,801 | 19 | $0 | |
36415 |
Insertion of needle into vein for collection of blood sample | 3,023 | 1,072 | $8 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 2,839 | 1,016 | $8 | |
80053 |
Blood test, comprehensive group of blood chemicals | 2,583 | 970 | $10 | |
84100 |
Phosphate level | 2,356 | 865 | $5 | |
83615 |
Lactate dehydrogenase (enzyme) level | 2,297 | 852 | $6 |
In context: peer comparison
Among 103 peers in this city , average services per provider: 411. This provider delivers 380× the peer median.Open Payments
Industry payments received
All-time total
$17
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Agios Pharmaceuticals, Inc. | 1 | $16.53 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
833
Patients
146
Total drug cost
$2,318,903
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Aranesp (Darbepoetin Alfa In Polysorbat) | Brand | 186 | 47 | $701,528 |
| Hydroxyurea | Generic | 153 | 25 | $4,990 |
| Prednisone | Generic | 59 | 21 | $542 |
| Atorvastatin Calcium | Generic | 54 | 13 | $659 |
| Omeprazole | Generic | 43 | 15 | $670 |
| Procrit (Epoetin Alfa) | Brand | 43 | 0 | $117,740 |
| Allopurinol | Generic | 42 | 14 | $643 |
| Eliquis (Apixaban) | Brand | 41 | 11 | $40,424 |
| Imbruvica (Ibrutinib) | Brand | 38 | 0 | $611,128 |
| Akynzeo (Fosnetupitant/Palonosetron) | Brand | 32 | 0 | $40,840 |
Hospital affiliations
Frequently asked questions
What is Dr. Steven Gruenstein's medical specialty?
Dr. Steven Gruenstein practices Hematology & Oncology Physician in New York, NY.
Where does Dr. Steven Gruenstein practice?
Dr. Steven Gruenstein practices at 12 E 86Th St Ofc 4, New York, NY 100280517. Office phone: 2128616660.
What is Dr. Steven Gruenstein's NPI?
Dr. Steven Gruenstein's National Provider Identifier (NPI) is 1407855307, issued by NPPES.
Does Dr. Steven Gruenstein accept Medicare assignment?
Yes. Dr. Steven Gruenstein accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Steven Gruenstein commonly perform?
Top Medicare-reported procedures in 2023: Injection, ferric carboxymaltose, 1 mg (HCPCS J1439); Injection, darbepoetin alfa, 1 microgram (non-esrd use) (HCPCS J0881); Flow cytometry technique for dna or cell analysis, each additional marker (HCPCS 88185). Source: CMS Medicare Physician & Other Practitioners file.