NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1720024136 M.D.
Verify on CMS → Steven Gruber, M.D.
Nephrology Physician in New York, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,806 in Nephrology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
3K
Medicare Part D claims · 458 beneficiaries · Nephrology Physician avg: 2K
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$24.24
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Steven Gruber, M.D. filed 3,047 Medicare Part D claims in 2024 as a Nephrology Physician in New York, New York, prescribing 93% generic.
- 3K
- Part D claims, 2024
- 93%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥88th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Steven Gruber, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1720024136), first enumerated 06/22/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 3,047 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$24.24 in reported industry payments (1 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
New York statewide board action statistics are published annually — these figures describe aggregate state activity, not Steven Gruber, M.D.'s individual license status. Verify directly with the state medical board.
Source: NYSBPMC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1720024136 · Nephrology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1720024136
- ENUM-LEGACY 2006
- TAX-MID 11K Nephrology Physician
- RX-MID 3,047
- BOOK-LIGHT 852 in New York
- PHOTO-ENUM Walter Moore, MD · 2006
Steven Gruber, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
3,047 ≥ 88th percentile 88% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Steven Gruber, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Steven Gruber, M.D.?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
3,047 102% vs specialty avg
Specialty distribution in New York
How Nephrology Physician compares to other specialties among New York providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nephrology Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1720024136 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/22/2006 |
Hospital and facility affiliations
Facilities where Steven Gruber, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Icahn School OF Medicine AT Mount Sinai
New York, NY
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Steven Gruber, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$24
Largest payer
Ardelyx, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - New York NYSBPMC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~100K New York medical licensees in 2023 - they are NOT specific to Steven Gruber, M.D.. To verify Steven Gruber, M.D.'s current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Steven Gruber, M.D. - brand share 7.0%
Nephrology Physician average
7% brand-name claims vs 93% generic, on 3,047 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
3,047
Total Claims
$245K
Total Drug Cost
458
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,437.533
- Total Day Supply
- 221,362
- Brand vs Generic
- 7% brand / 93% generic
- Brand Drug Cost
- $168K
- Generic Drug Cost
- $76K
- Opioid Claims
- 18 (0.6% rate)
- Antibiotic Claims
- 29
Patient Demographics
- Average Patient Age
- 72.6 years
- Avg HCC Risk Score
- 2.52
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 65, 65-74: 188, 75-84: 162, 85+: 43
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Steven Gruber, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Calcitriol
Calcitriol
440 claims
- Nifedipine Er
Nifedipine Er
253 claims
- Allopurinol 150
Allopurinol
150 claims
- Atorvastatin Calcium 147
Atorvastatin Calcium
147 claims
- Amlodipine Besylate 109
Amlodipine Besylate
109 claims
- Chlorthalidone 105
Chlorthalidone
105 claims
- Furosemide 105
Furosemide
105 claims
- Ramipril 101
Ramipril
101 claims
| Drug | Claims |
|---|---|
| Calcitriol | 440 |
| Nifedipine Er Nifedipine | 253 |
| Allopurinol | 150 |
| Atorvastatin Calcium | 147 |
| Amlodipine Besylate | 109 |
| Chlorthalidone | 105 |
| Furosemide | 105 |
| Ramipril | 101 |
| Losartan Potassium | 97 |
| Metoprolol Succinate | 97 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Steven Gruber, M.D. fits within the Nephrology Physician landscape nationally.
10,806
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,511
Avg Claims per Provider
Steven Gruber, M.D.'s 3,047 claims are above the specialty average of 1,511.
Nationwide Nephrology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Gruber, both outside New York so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Nephrology Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Gruber.
One of 852 Nephrology Physician providers enrolled in New York, 5 are shown here.
Dr. Mersema Abate
MD
East Setauket, NY
Dr. Rula Abdulrahman
M.D.
Stony Brook, NY
Dr. Matthew Abramson
M.D.
New York, NY
Dr. Niraj Acharya
MD
Brooklyn, NY
Dr. Sujatha Addagatla
M.D.
Niagara Falls, NY
Compare Nephrology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Steven Gruber, M.D.'s specialty? ▼
Steven Gruber, M.D. specializes in Nephrology Physician and practices in New York, New York. Credentials: M.D..
How much does Steven Gruber, M.D. prescribe under Medicare Part D? ▼
In 2024, Steven Gruber, M.D. wrote 3,047 Medicare Part D claims totaling $245K in drug costs for 458 beneficiaries.
Where is Steven Gruber, M.D. located? ▼
Steven Gruber, M.D. is located at 10 UNION SQUARE EAST, New York, NY, 10003. Phone: (212) 420-4003.
What is Steven Gruber, M.D.'s NPI number? ▼
Steven Gruber, M.D.'s National Provider Identifier (NPI) is 1720024136, issued on 06/22/2006.
Does Steven Gruber, M.D. prescribe more brand-name or generic drugs? ▼
Steven Gruber, M.D.'s prescribing is 7% brand-name and 93% generic drugs by claim count, with $168K in brand drug costs.
Does Steven Gruber, M.D. prescribe opioids? ▼
Yes, Steven Gruber, M.D. had 18 opioid claims in 2024 with an opioid prescribing rate of 0.6%.
How many Nephrology Physician providers are there in the US? ▼
There are 10,806 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,511 Medicare Part D claims per year.
What drugs does Steven Gruber, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Steven Gruber, M.D.'s most frequently prescribed drugs include Calcitriol, Nifedipine Er, Allopurinol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Steven Gruber, M.D. accept Medicare? ▼
Steven Gruber, M.D. appears in CMS Medicare data with 3,047 Part D claims and 458 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Steven Gruber, M.D.'s credentials? ▼
Steven Gruber, M.D.'s NPI is 1720024136 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.