John Grassi, PA
- Medicare services, 2024
- 624
- Medicare patients, 2024
- 347
- Part D claims, 2024
- 301
- MIPS score, 2024
- 82
- Hospital affiliations
- 1
- Practice address
- 339 Main St, Huntington, NY 11743
- Practice phone
- Call (631) 470-9090
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Optum Radiology - Huntington
Mammography / Breast Imaging Center · Huntington, New York
Find John Grassi'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.
John Grassi is an emergency medicine physician in Huntington, New York
John Grassi practices at Optum Radiology - Huntington in Huntington, New York.
John Grassi's NPI, 1457471450, was assigned on March 31, 2007. John Grassi holds New York license 006579.
- NPI
- 1457471450NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234363656
- NPI enumeration date
- March 31, 2007
- NPI status
- Active
- Practice phone
- (631) 470-9090
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
John Grassi practices at Optum Radiology - Huntington in Huntington, New York
John Grassi's primary practice is Optum Radiology - Huntington, at 339 Main St, Huntington, NY 11743. The practice phone is (631) 470-9090.
- Optum Radiology - Huntington339 Main St, Huntington, NY 11743Phone(631) 470-9090
Source: Dmand AI Affiliation Data
John Grassi is affiliated with 2 sites of care and 3 medical groups
John Grassi's primary practice is Optum Radiology - Huntington in Huntington, New York. John Grassi is also affiliated with North Shore University Hospital. The medical group on file is Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI also links John Grassi to 2 more medical groups, each named with a free account. John Grassi's employer is on file too: a breast imaging center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John Grassi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Grassi practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Optum Radiology - Huntington | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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John Grassi is one of 3,709 emergency medicine physicians in New York
Emergency medicine is John Grassi's primary specialty in the NPI Registry, under taxonomy code 207P00000X. John Grassi is licensed in New York.
Specialties and state licenses
- Emergency medicine, New YorkPrimary
Emergency medicine physicians near John Grassi
Counts of emergency medicine physicians 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
John Grassi billed Medicare for 624 services in 2024
CMS data shows 624 Medicare services from John Grassi across 9 procedure codes in 2024, for 347 Medicare patients. Medicare paid $30,194 for them. Every service was in an office.
John Grassi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4392024: 36517%
- Lab and pathology
- 2023: 2852024: 2599%
John Grassi compared with the New York median for emergency medicine physicians, 2024
- John Grassi
- New York median
- Medicare services
- 624vs 2192.8 times
- Medicare patients
- 347vs 21661% above
- Part D claims
- 237vs 298.2 times
Medians across 3,510 emergency medicine physicians in New York with Dmand AI profiles that report each measure.
John Grassi'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
John Grassi treated 347 Medicare patients in 2024, average age 75
CMS counts 347 Medicare patients who saw John Grassi in 2024. The largest group is 65 to 74, with 154 patients. 75% of them have high cholesterol, and 61% have high blood pressure. 4% are also on Medicaid. Their average risk score is 0.88, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts John Grassi's median patient age at 36, with 62% women.
John Grassi's Medicare patients by age, 2024
John Grassi's Medicare patients by sex, 2024
- Women21662%
- Men13138%
Chronic conditions among John Grassi's Medicare patients, 2024
- High cholesterol75%
- High blood pressure61%
- Arthritis50%
- Ischemic heart disease33%
- Diabetes24%
- Anxiety22%
- Atrial fibrillation20%
- Osteoporosis20%
Share of Medicare patients with each condition. A patient can have several.
John Grassi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 36
Patient panel by sex, all payers
- Women62%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
John Grassi wrote 301 Medicare Part D claims in 2024
In 2024, John Grassi wrote 301 Medicare Part D claims for 241 patients. 89% of them were for generic drugs. CMS names the drug for 237 of them, across 10 drugs with 11 or more claims each, at $2,882 in total drug cost. In 2023, CMS named 295 claims across 9 drugs.
John Grassi's Part D claims by kind of drug, 2024
- Generic267 claims89%
- Brand-name and other34 claims11%
John Grassi'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.
Drug classes CMS tracks in John Grassi's Part D claims, 2024
- Antibiotics54%162 of 301 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2952024: 23720%
Drugs named by CMS: 10 in 2024, 9 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
John Grassi scored 82 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 82 out of 100 for John Grassi for performance year 2024, reported as part of a group.
John Grassi's MIPS scores, performance year 2024
- 82of 100Final score
- 72.1of 100Quality
- 91of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Sources for John Grassi'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 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 | Clinician Public Reporting: Overall MIPS Performance (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 John Grassi
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John Grassi's NPI number?
John Grassi's NPI number is 1457471450. It was assigned on March 31, 2007, and it is active in the NPI Registry.
What does John Grassi specialize in?
John Grassi is an emergency medicine physician in Huntington, New York. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does John Grassi practice?
John Grassi practices at 339 Main St, Huntington, NY 11743. John Grassi's primary practice is Optum Radiology - Huntington in Huntington, New York. Dmand AI also links John Grassi to 2 medical groups.
What is John Grassi's office phone number?
The practice phone on file for John Grassi is (631) 470-9090.
What is John Grassi's medical license number?
John Grassi holds New York license 006579.
Which hospitals is John Grassi affiliated with?
John Grassi is affiliated with North Shore University Hospital.
What medical group is John Grassi part of?
John Grassi is linked to Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI links John Grassi to 2 more medical groups.
Does John Grassi accept Medicare?
Yes. CMS data shows John Grassi billed Medicare for 624 services in 2024.
What is John Grassi's MIPS score?
John Grassi's MIPS final score for performance year 2024 is 82 out of 100, reported as part of a group.
How many Medicare patients does John Grassi see?
CMS counts 347 Medicare patients who saw John Grassi in 2024, with an average age of 75.
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What services does John Grassi bill to Medicare?
In 2024, John Grassi's most billed Medicare services were office visit, established patient (99213), lab and pathology test (87804) and lab and pathology test (87811).
What drugs does John Grassi prescribe most?
In 2024 Medicare Part D data, John Grassi's most prescribed drugs by claims were Amoxicillin, Methylprednisolone and Nitrofurantoin Mono-Macro.
How long has John Grassi been practicing?
John Grassi graduated from medical school in 1998, 28 years ago.
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