NPI registry status
Active
2026 NPPES data Addiction Medicine (Internal Medicine) Physician NPI 1518296078 M.D.
Verify on CMS → Stefan Kantrowitz, M.D.
Addiction Medicine (Internal Medicine) Physician in Garden City, 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 553 in Addiction Medicine (Internal Medicine) 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
484
Medicare Part D claims · 53 beneficiaries · Addiction Medicine (Internal Medicine) Physician avg: 1K
Industry payments
$8.6K
24 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Stefan Kantrowitz, M.D. filed 484 Medicare Part D claims in 2023 as an Addiction Medicine (Internal Medicine) Physician in Garden City, New York.
- 484
- Part D claims, 2023
- $8.6K
- industry payments (Sunshine Act)
- ≥62nd
- 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 Stefan Kantrowitz, 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 1518296078), first enumerated 12/12/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 484 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
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$8.6K in reported industry payments (24 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 Stefan Kantrowitz, 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 1518296078 · Addiction Medicine (Internal Medicine) Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1518296078
- ENUM-MID 2009
- TAX-NARROW 553
- RX-LIGHT 484
- BOOK-THIN 55 in New York
- PHOTO-ENUM Thomas Howard, III · 2009
Stefan Kantrowitz, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
484 ≥ 62nd percentile 62% of 1,370,886 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 · 2023
◑
Board-eligible specialty (heuristic, not verified)
Stefan Kantrowitz, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Stefan Kantrowitz, M.D.?
Quality data not reportedPrimary specialty
Addiction Medicine (Internal Medicine) Physician
Medicare Part D claims
484 66% vs specialty avg
Specialty distribution in New York
How Addiction Medicine (Internal Medicine) 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 Addiction Medicine (Internal Medicine) 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 | 1518296078 |
|---|---|
| Specialty | Addiction Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 12/12/2009 |
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 Stefan Kantrowitz, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$8.6K
Largest payer
Alkermes, 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 Stefan Kantrowitz, M.D.. To verify Stefan Kantrowitz, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
484
Total Claims
$29K
Total Drug Cost
53
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 484
- Total Day Supply
- 14,206
- Generic Drug Cost
- $19K
Patient Demographics
- Average Patient Age
- 61.7 years
- Avg HCC Risk Score
- 1.66
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 26, 65-74: 23, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Stefan Kantrowitz, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
64 claims
- Trazodone Hcl
Trazodone Hcl
59 claims
- Escitalopram Oxalate
Escitalopram Oxalate
50 claims
- Sertraline Hcl
Sertraline Hcl
44 claims
- Quetiapine Fumarate
Quetiapine Fumarate
42 claims
- Hydroxyzine Hcl
Hydroxyzine Hcl
40 claims
- Aripiprazole
Aripiprazole
35 claims
- Gabapentin 20
Gabapentin
20 claims
| Drug | Claims |
|---|---|
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 64 |
| Trazodone Hcl | 59 |
| Escitalopram Oxalate | 50 |
| Sertraline Hcl | 44 |
| Quetiapine Fumarate | 42 |
| Hydroxyzine Hcl | 40 |
| Aripiprazole | 35 |
| Gabapentin | 20 |
| Mirtazapine | 20 |
| Naltrexone Hcl | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Addiction Medicine (Internal Medicine) Physician in NY →
All providers in New York →
Compare specialties →
Addiction Medicine (Internal Medicine) Physician Overview
How Stefan Kantrowitz, M.D. fits within the Addiction Medicine (Internal Medicine) Physician landscape nationally.
553
Addiction Medicine (Internal Medicine) Physician Providers in US
46
States with Addiction Medicine (Internal Medicine) Physician
1,403
Avg Claims per Provider
Stefan Kantrowitz, M.D.'s 484 claims are below the specialty average of 1,403.
Nationwide Addiction Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Kantrowitz, both outside New York so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Addiction Medicine (Internal Medicine) Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Kantrowitz.
One of 55 Addiction Medicine (Internal Medicine) Physician providers enrolled in New York, 5 are shown here.
Frequently Asked Questions
What is Stefan Kantrowitz, M.D.'s specialty? ▼
Stefan Kantrowitz, M.D. specializes in Addiction Medicine (Internal Medicine) Physician and practices in Garden City, New York. Credentials: M.D..
How much does Stefan Kantrowitz, M.D. prescribe under Medicare Part D? ▼
In 2023, Stefan Kantrowitz, M.D. wrote 484 Medicare Part D claims totaling $29K in drug costs for 53 beneficiaries.
Where is Stefan Kantrowitz, M.D. located? ▼
Stefan Kantrowitz, M.D. is located at 111 7TH ST UNIT 111, Garden City, NY, 11530. Phone: (212) 203-9744.
What is Stefan Kantrowitz, M.D.'s NPI number? ▼
Stefan Kantrowitz, M.D.'s National Provider Identifier (NPI) is 1518296078, issued on 12/12/2009.
How many Addiction Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 553 Addiction Medicine (Internal Medicine) Physician providers across 46 states in the US. The average Addiction Medicine (Internal Medicine) Physician provider writes 1,403 Medicare Part D claims per year.
What drugs does Stefan Kantrowitz, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Stefan Kantrowitz, M.D.'s most frequently prescribed drugs include Buprenorphine-Naloxone, Trazodone Hcl, Escitalopram Oxalate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stefan Kantrowitz, M.D. accept Medicare? ▼
Stefan Kantrowitz, M.D. appears in CMS Medicare data with 484 Part D claims and 53 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stefan Kantrowitz, M.D.'s credentials? ▼
Stefan Kantrowitz, M.D.'s NPI is 1518296078 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 (2023). 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 April 2026 (NPPES) / 2023 (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 May 2026.