Kristina T. Grehan
- Medicare patients, 2024
- 12
- Part D claims, 2024
- 173
- MIPS score, 2024
- 93
- Hospital affiliations
- 1
- Industry payments
- $61
- Practice address
- 300 Community Drive, Manhasset, NY 11030
- Practice phone
- Call (516) 562-0100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Kristina Grehan'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.
Kristina T. Grehan is a family nurse practitioner in Manhasset, New York
Kristina Grehan practices at North Shore University Hospital in Manhasset, New York, part of Northwell Health.
Kristina Grehan's NPI, 1992138218, was assigned on August 11, 2013. Kristina Grehan holds New York license F338161-1.
- NPI
- 1992138218NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9931408077
- NPI enumeration date
- August 11, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (516) 562-0100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Kristina T. Grehan practices at North Shore University Hospital in Manhasset, New York
Kristina Grehan's primary practice is North Shore University Hospital, at 300 Community Drive, Manhasset, NY 11030 in Nassau County. The practice phone is (516) 562-0100.
- North Shore University Hospital300 Community Drive, Manhasset, NY 11030 · Nassau CountyPhone(516) 562-0100
Source: Dmand AI Affiliation Data
Kristina T. Grehan is affiliated with 1 site of care and 2 medical groups
Kristina Grehan's primary practice is North Shore University Hospital in Manhasset, New York, part of Northwell Health. The medical group on file is Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI also links Kristina Grehan to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Kristina T. Grehan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Kristina Grehan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| North Shore University Hospital | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Kristina T. Grehan is one of 10,214 family nurse practitioners in New York
Family is Kristina Grehan's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Kristina Grehan is licensed in New York.
Specialties and state licenses
- Family nurse practitioner, New YorkPrimary
Family nurse practitioners near Kristina Grehan
Counts of family nurse practitioners 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
Kristina T. Grehan treated 12 Medicare patients in 2024, average age 81
CMS counts 12 Medicare patients who saw Kristina Grehan in 2024. The largest group is under 65, with 0 patients. 75% of them have high blood pressure, and 75% have ischemic heart disease. Their average risk score is 1.84, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Kristina Grehan's median patient age at 84, with 0% women.
Kristina Grehan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Kristina Grehan's Medicare patients, 2024
- High blood pressure75%
- Ischemic heart disease75%
Share of Medicare patients with each condition. A patient can have several.
Kristina Grehan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 84
Patient panel by sex, all payers
- Women0%
- Men100%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Kristina T. Grehan wrote 173 Medicare Part D claims in 2024
In 2024, Kristina Grehan wrote 173 Medicare Part D claims for 64 patients. 82% of them were for generic drugs.
Kristina Grehan's Part D claims by kind of drug, 2024
- Generic142 claims82%
- Brand-name31 claims18%
Drug classes CMS tracks in Kristina Grehan's Part D claims, 2024
- Antibiotics8%14 of 173 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Kristina T. Grehan scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Kristina Grehan for performance year 2024, reported through an alternative payment model (APM). Kristina Grehan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Kristina Grehan's MIPS scores, performance year 2024
- 93of 100Final score
- 79.8of 100Quality
- 89of 100Promoting Interoperability
- 40of 100Improvement Activities
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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Kristina T. Grehan received $61 in industry payments in 2025
CMS Open Payments shows 1 general payment to Kristina Grehan from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Puma Biotechnology, Inc. paid the most, $61.
Companies that paid Kristina Grehan the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Kristina T. Grehan'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 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 (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) |
| 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 Kristina T. Grehan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Kristina T. Grehan's NPI number?
Kristina T. Grehan's NPI number is 1992138218. It was assigned on August 11, 2013, and it is active in the NPI Registry.
What does Kristina T. Grehan specialize in?
Kristina T. Grehan is a family nurse practitioner in Manhasset, New York. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Kristina T. Grehan practice?
Kristina Grehan practices at 300 Community Drive, Manhasset, NY 11030. Kristina Grehan's primary practice is North Shore University Hospital in Manhasset, New York, part of Northwell Health. Dmand AI also links Kristina Grehan to 1 medical group.
What is Kristina T. Grehan's office phone number?
The practice phone on file for Kristina Grehan is (516) 562-0100.
What is Kristina T. Grehan's medical license number?
Kristina Grehan holds New York license F338161-1.
Which hospitals is Kristina T. Grehan affiliated with?
Kristina Grehan practices at North Shore University Hospital in Manhasset, New York.
What medical group is Kristina T. Grehan part of?
Kristina Grehan is linked to Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI links Kristina Grehan to 1 more medical group.
Does Kristina T. Grehan accept Medicare?
Yes. CMS lists Kristina Grehan as accepting Medicare assignment.
What is Kristina T. Grehan's MIPS score?
Kristina Grehan's MIPS final score for performance year 2024 is 93 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Kristina T. Grehan see?
CMS counts 12 Medicare patients who saw Kristina Grehan in 2024, with an average age of 81.
Has Kristina T. Grehan received payments from drug or device companies?
CMS Open Payments shows $61 in general payments to Kristina Grehan from 1 company from 2025 to 2025. The largest total came from Puma Biotechnology, Inc.
How long has Kristina T. Grehan been practicing?
Kristina Grehan graduated from medical school in 2013, 13 years ago.
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