Dr. Nicholas James Hornstein, MD, PhD
- Medicare services, 2024
- 58
- Medicare patients, 2024
- 38
- Part D claims, 2024
- 55
- MIPS score, 2024
- 79
- Hospital affiliations
- 3
- Practice address
- 27005 76th Ave, New Hyde Park, NY 11040
- Practice phone
- Call (516) 876-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Long Island Jewish Medical Center
New Hyde Park, New York
Find Dr. Hornstein's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Nicholas James Hornstein is an internist in New Hyde Park, New York
Dr. Hornstein practices at Long Island Jewish Medical Center in New Hyde Park, New York.
Dr. Hornstein's NPI, 1548764848, was assigned on March 21, 2018. Dr. Hornstein graduated from Columbia University College of Physicians and Surgeons in 2018. Dr. Hornstein holds Texas license T5126.
- NPI
- 1548764848NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224411541
- NPI enumeration date
- March 21, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (516) 876-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nicholas James Hornstein practices at Long Island Jewish Medical Center in New Hyde Park, New York
Dr. Hornstein's primary practice is Long Island Jewish Medical Center, at 27005 76th Ave, New Hyde Park, NY 11040 in Nassau County. The practice phone is (516) 876-6000.
- Long Island Jewish Medical Center27005 76th Ave, New Hyde Park, NY 11040 · Nassau CountyPhone(516) 876-6000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Nicholas James Hornstein is affiliated with 4 sites of care and 1 medical group
Dr. Hornstein's primary practice is Long Island Jewish Medical Center in New Hyde Park, New York. Dr. Hornstein is also affiliated with Long Island Jewish Medical Center. The medical group on file is Northwell Health Physician Partners. Dmand AI also links Dr. Hornstein to 2 more hospitals, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nicholas James Hornstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hornstein practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Long Island Jewish Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nicholas James Hornstein is one of 9,643 internists in New York
Internal medicine is Dr. Hornstein's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Hornstein's licenses on file in 2 states: Texas and California.
Specialties and state licenses
- Internal medicine, TexasPrimary
- California license
Internists near Dr. Hornstein
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Nicholas James Hornstein billed Medicare for 58 services in 2024
CMS data shows 58 Medicare services from Dr. Hornstein across 3 procedure codes in 2024, for 38 Medicare patients. Medicare paid $6,371 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hornstein compared with the New York median for internists, 2024
- Dr. Hornstein
- New York median
- Medicare services
- 58vs 42686% below
- Medicare patients
- 38vs 15876% below
- Part D claims
- 13vs 62298% below
Medians across 9,428 internists in New York with Dmand AI profiles that report each measure.
Dr. Hornstein's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hornstein and other internists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nicholas James Hornstein treated 38 Medicare patients in 2024, average age 78
CMS counts 38 Medicare patients who saw Dr. Hornstein in 2024. The largest group is 75 to 84, with 18 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 2.19, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Hornstein's median patient age at 70, with 52% women.
Dr. Hornstein's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hornstein's Medicare patients by sex, 2024
- Women1232%
- Men2668%
Chronic conditions among Dr. Hornstein's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Chronic kidney disease53%
- Ischemic heart disease53%
- Cancer45%
- Diabetes45%
- Heart failure42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hornstein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women52%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nicholas James Hornstein wrote 55 Medicare Part D claims in 2024
In 2024, Dr. Hornstein wrote 55 Medicare Part D claims for 14 patients. 82% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $43 in total drug cost.
Dr. Hornstein's Part D claims by kind of drug, 2024
- Generic45 claims82%
- Brand-name and other10 claims18%
Dr. Hornstein's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Nicholas James Hornstein scored 79 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 79 out of 100 for Dr. Hornstein for performance year 2024, reported as part of a group. Dr. Hornstein accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Hornstein as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Hornstein's MIPS scores, performance year 2024
- 79of 100Final score
- 57.9of 100Quality
- 77of 100Promoting Interoperability
- 40of 100Improvement Activities
- 80of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Nicholas James Hornstein received $25,431 in industry payments from 2022 to 2025
CMS Open Payments shows 43 general payments to Dr. Hornstein from 17 drug and device companies from 2022 to 2025. Consulting fees make up the largest share, 84% of the total. Bristol-Myers Squibb Company paid the most, $8,267.
General payments to Dr. Hornstein by program year, 2022 to 2025
General payments to Dr. Hornstein by kind, 2022 to 2025
- Consulting fees$21,30384%
- Travel and lodging$2,48110%
- Food and beverage$1,3875%
- Education$2601%
Companies that paid Dr. Hornstein the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Nicholas James Hornstein graduated from Columbia University College of Physicians and Surgeons
Dr. Hornstein graduated from Columbia University College of Physicians and Surgeons in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Nicholas James Hornstein's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Nicholas James Hornstein
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Nicholas James Hornstein's NPI number?
Dr. Nicholas James Hornstein's NPI number is 1548764848. It was assigned on March 21, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Nicholas James Hornstein?
Dr. Nicholas James Hornstein is an internist in New Hyde Park, New York. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Nicholas James Hornstein practice?
Dr. Hornstein practices at 27005 76th Ave, New Hyde Park, NY 11040. Dr. Hornstein's primary practice is Long Island Jewish Medical Center in New Hyde Park, New York. Dmand AI also links Dr. Hornstein to 2 hospitals.
What is Dr. Nicholas James Hornstein's office phone number?
The practice phone on file for Dr. Hornstein is (516) 876-6000.
What is Dr. Nicholas James Hornstein's medical license number?
Dr. Hornstein holds Texas license T5126, one of the licenses on file in 2 states.
Which states has Dr. Nicholas James Hornstein been licensed in?
Dmand AI has state licenses on file for Dr. Hornstein in Texas and California.
Which hospitals is Dr. Nicholas James Hornstein affiliated with?
Dr. Hornstein is affiliated with Long Island Jewish Medical Center. Dmand AI links Dr. Hornstein to 2 more hospitals.
What medical group is Dr. Nicholas James Hornstein part of?
Dr. Hornstein is linked to Northwell Health Physician Partners.
Does Dr. Nicholas James Hornstein accept Medicare?
Yes. CMS data shows Dr. Hornstein billed Medicare for 58 services in 2024, and Dr. Hornstein accepts Medicare assignment.
Does Dr. Nicholas James Hornstein offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Hornstein as offering telehealth services.
Show 7 more questionsShow fewer questions
What is Dr. Nicholas James Hornstein's MIPS score?
Dr. Hornstein's MIPS final score for performance year 2024 is 79 out of 100, reported as part of a group.
How many Medicare patients does Dr. Nicholas James Hornstein see?
CMS counts 38 Medicare patients who saw Dr. Hornstein in 2024, with an average age of 78.
What services does Dr. Nicholas James Hornstein bill to Medicare?
In 2024, Dr. Hornstein's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99223) and hospital inpatient care (99232).
Where did Dr. Nicholas James Hornstein go to medical school?
Dr. Hornstein graduated from Columbia University College of Physicians and Surgeons in 2018.
What drugs does Dr. Nicholas James Hornstein prescribe most?
In 2023 Medicare Part D data, Dr. Hornstein's most prescribed drugs by claims were Prednisone.
Has Dr. Nicholas James Hornstein received payments from drug or device companies?
CMS Open Payments shows $25,431 in general payments to Dr. Hornstein from 17 companies from 2022 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Nicholas James Hornstein been practicing?
Dr. Hornstein graduated from medical school in 2018, 8 years ago.
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