Dr. John Hassett, MD
- Part D claims, 2024
- 232
- Hospital affiliations
- 1
- Industry payments
- $11,978
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 1000 N.Village Ave., Rockville Centre, NY 11570
- Practice phone
- Call (516) 705-2216
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mercy Medical Center - Unit
Acute Care Hospital-Unit · Rockville Centre, New York
Find Dr. Hassett'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. John Hassett is a pulmonologist in Rockville Centre, New York
Dr. Hassett practices at Mercy Medical Center - Unit in Rockville Centre, New York.
Dr. Hassett's NPI, 1427143049, was assigned on October 3, 2006. Dr. Hassett holds New York license 201812.
- NPI
- 1427143049NPI Registry (opens in a new tab)
- NPI enumeration date
- October 3, 2006
- NPI status
- Active
- Practice phone
- (516) 705-2216
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. John Hassett practices at Mercy Medical Center - Unit in Rockville Centre, New York
Dr. Hassett's primary practice is Mercy Medical Center - Unit, at 1000 N.Village Ave., Rockville Centre, NY 11570 in Nassau County. The practice phone is (516) 705-2216.
- Mercy Medical Center - Unit1000 N.Village Ave., Rockville Centre, NY 11570 · Nassau CountyPhone(516) 705-2216
Source: Dmand AI Affiliation Data
Dr. John Hassett is affiliated with 1 site of care
Dr. Hassett's primary practice is Mercy Medical Center - Unit in Rockville Centre, New York.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Hassett's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hassett practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Medical Center - Unit | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Hassett is one of 1,056 pulmonologists in New York
Pulmonary disease is Dr. Hassett's primary specialty in the NPI Registry, under taxonomy code 207RP1001X. Dr. Hassett is licensed in New York.
Specialties and state licenses
- Pulmonary disease, New YorkPrimary
Pulmonologists near Dr. Hassett
Counts of pulmonologists 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. John Hassett's patients have a median age of 53
Across all payers, Dmand AI patient panel data puts Dr. Hassett's median patient age at 53, with 30% women.
Dr. Hassett's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women30%
- Men70%
Source: Dmand AI Patient Panel Data
Dr. John Hassett wrote 232 Medicare Part D claims in 2024
In 2024, Dr. Hassett wrote 232 Medicare Part D claims for 21 patients. 49% of them were for generic drugs. CMS names the drug for 146 of them, across 9 drugs with 11 or more claims each, at $40,204 in total drug cost. In 2023, CMS named 81 claims across 5 drugs.
Dr. Hassett's Part D claims by kind of drug, 2024
- Generic114 claims49%
- Brand-name118 claims51%
Dr. Hassett's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 812024: 14680%
Drugs named by CMS: 9 in 2024, 5 in 2023.
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
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Dr. John Hassett received $11,978 in industry payments from 2016 to 2025
CMS Open Payments shows 140 general payments to Dr. Hassett from 18 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 57% of the total. Sunovion Pharmaceuticals Inc. paid the most, $10,274.
General payments to Dr. Hassett by program year, 2016 to 2025
General payments to Dr. Hassett by kind, 2016 to 2025
- Speaker and faculty fees$6,84057%
- Food and beverage$2,57622%
- Travel and lodging$2,56221%
Companies that paid Dr. Hassett the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John Hassett'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. John Hassett
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. John Hassett's NPI number?
Dr. John Hassett's NPI number is 1427143049. It was assigned on October 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Hassett?
Dr. John Hassett is a pulmonologist in Rockville Centre, New York. The primary specialty in the NPI Registry is Pulmonary Disease Physician (taxonomy code 207RP1001X).
Where does Dr. John Hassett practice?
Dr. Hassett practices at 1000 N.Village Ave., Rockville Centre, NY 11570. Dr. Hassett's primary practice is Mercy Medical Center - Unit in Rockville Centre, New York.
What is Dr. John Hassett's office phone number?
The practice phone on file for Dr. Hassett is (516) 705-2216.
What is Dr. John Hassett's medical license number?
Dr. Hassett holds New York license 201812.
What drugs does Dr. John Hassett prescribe most?
In 2024 Medicare Part D data, Dr. Hassett's most prescribed drugs by claims were Breo Ellipta, Montelukast Sodium and Trelegy Ellipta.
Has Dr. John Hassett received payments from drug or device companies?
CMS Open Payments shows $11,978 in general payments to Dr. Hassett from 18 companies from 2016 to 2025. The largest total came from Sunovion Pharmaceuticals Inc.
How long has Dr. John Hassett been practicing?
Dr. Hassett's NPI was assigned in 2006.
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