Rosemary A. Mahan, CPNP, RN
- Hospital affiliations
- 1
- Industry payments
- $354
- State license
- 1
- Year NPI issued
- 2008
- Practice address
- 75 North Country Road, Port Jefferson, NY 11777
- Practice phone
- Call (631) 473-1320
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Rosemary Mahan'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.
Rosemary A. Mahan is a pediatric nurse practitioner in Port Jefferson, New York
Rosemary Mahan practices at Mather Hospital in Port Jefferson, New York, part of Northwell Health.
Rosemary Mahan's NPI, 1073773529, was assigned on June 9, 2008. Rosemary Mahan holds New York license F380497-1.
- NPI
- 1073773529NPI Registry (opens in a new tab)
- NPI enumeration date
- June 9, 2008
- NPI status
- Active
- Practice phone
- (631) 473-1320
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Rosemary A. Mahan practices at Mather Hospital in Port Jefferson, New York
Rosemary Mahan's primary practice is Mather Hospital, at 75 North Country Road, Port Jefferson, NY 11777 in Suffolk County. The practice phone is (631) 473-1320.
- Mather Hospital75 North Country Road, Port Jefferson, NY 11777 · Suffolk CountyPhone(631) 473-1320
Source: Dmand AI Affiliation Data
Rosemary A. Mahan is affiliated with 2 sites of care
Rosemary Mahan's primary practice is Mather Hospital in Port Jefferson, New York, part of Northwell Health. Dmand AI also links Rosemary Mahan to 1 skilled nursing facility, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Rosemary A. Mahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Rosemary Mahan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mather Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Northwell Health and 6.2K+ hospitals, with verified contacts in the same login.
Rosemary A. Mahan is one of 949 pediatric nurse practitioners in New York
Nurse practitioner is Rosemary Mahan's primary specialty in the NPI Registry, under taxonomy code 363LP0200X. The record also lists pediatrics. Rosemary Mahan is licensed in New York.
Specialties and state licenses
- Pediatric nurse practitioner, New YorkPrimary
Pediatric nurse practitioners near Rosemary Mahan
Counts of pediatric 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
Rosemary A. Mahan's patients have a median age of 18
Across all payers, Dmand AI patient panel data puts Rosemary Mahan's median patient age at 18, with 44% women.
Rosemary Mahan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 18
Patient panel by sex, all payers
- Women44%
- Men56%
Source: Dmand AI Patient Panel Data
Rosemary A. Mahan received $354 in industry payments in 2025
CMS Open Payments shows 3 general payments to Rosemary Mahan from 3 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Uswm, LLC paid the most, $130.
Companies that paid Rosemary Mahan 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 Rosemary A. Mahan'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 Data |
| 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 Rosemary A. Mahan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Rosemary A. Mahan's NPI number?
Rosemary A. Mahan's NPI number is 1073773529. It was assigned on June 9, 2008, and it is active in the NPI Registry.
What does Rosemary A. Mahan specialize in?
Rosemary A. Mahan is a pediatric nurse practitioner in Port Jefferson, New York. The primary specialty in the NPI Registry is Pediatric Nurse Practitioner (taxonomy code 363LP0200X).
Where does Rosemary A. Mahan practice?
Rosemary Mahan practices at 75 North Country Road, Port Jefferson, NY 11777. Rosemary Mahan's primary practice is Mather Hospital in Port Jefferson, New York, part of Northwell Health. Dmand AI also links Rosemary Mahan to 1 skilled nursing facility.
What is Rosemary A. Mahan's office phone number?
The practice phone on file for Rosemary Mahan is (631) 473-1320.
What is Rosemary A. Mahan's medical license number?
Rosemary Mahan holds New York license F380497-1.
Which hospitals is Rosemary A. Mahan affiliated with?
Rosemary Mahan practices at Mather Hospital in Port Jefferson, New York.
Has Rosemary A. Mahan received payments from drug or device companies?
CMS Open Payments shows $354 in general payments to Rosemary Mahan from 3 companies from 2025 to 2025. The largest total came from Uswm, LLC.
How long has Rosemary A. Mahan been practicing?
Rosemary Mahan's NPI was assigned in 2008.
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