Physician Profile
Unclaimed ProfileAbout GRUENSTEIN
Steven Gruenstein, M.D. is a healthcare provider in New York, NY specializing in hematology/oncology. Steven is also listed as specializing in hematology & oncology. Medicare claims data shows Steven provided 104,880 services to 12,718 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (212) 861-6660
- Email not available
Practice Locations
12 E 86TH ST OFC 4
New York, NY 10028
Procedures Most Often Billed to Medicare
104,880 services · 12,718 patients · 25 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
2,942 |
| Injection, ferric carboxymaltose, 1 mg | Drug given | J1439 |
57,750 |
| Injection, darbepoetin alfa, 1 microgram (non-esrd use) | Drug given | J0881 |
7,900 |
| Injection, denosumab, 1 mg | Drug given | J0897 |
4,440 |
| Injection, dexamethasone sodium phosphate, 1 mg | Drug given | J1100 |
915 |
| Flow cytometry technique for dna or cell analysis, each additional marker | Lab test | 88185 |
5,989 |
| Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | Lab test | 85025 |
2,770 |
| Blood test, comprehensive group of blood chemicals | Lab test | 80053 |
2,602 |
| Phosphate level | Lab test | 84100 |
2,423 |
| Magnesium level | Lab test | 83735 |
2,367 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other hematology/oncology specialists in New York 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1984 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in NY who bill this service to Medicare most often.
Common questions
What does Dr. Gruenstein specialize in?
Dr. Gruenstein is a hematology/oncology in New York, NY. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “HEMATOLOGY/ONCOLOGY”.
NPI registry
Where is Dr. Gruenstein located?
Dr. Gruenstein is listed at 12 E 86TH ST OFC 4, New York, NY 10028. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Gruenstein's phone number?
The number on file is (212) 861-6660. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Gruenstein?
Dr. Gruenstein's National Provider Identifier is 1407855307. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Gruenstein go to medical school?
Dr. Gruenstein attended Other, graduating in 1984. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Gruenstein have?
Dr. Gruenstein has 42 years experience. Calculated from a graduation year of 1984, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Gruenstein do most often?
According to Medicare billing data, Dr. Gruenstein performs procedures including insertion of needle into vein for collection of blood sample, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Gruenstein's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gruenstein. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.