Stephanie F. Twomey, PA
- Hospital affiliations
- 1
- Industry payments
- $20
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2010
- Practice address
- 100 Woods Rd, Valhalla, NY 10595
- Practice phone
- Call (914) 493-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Stephanie Twomey'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.
Stephanie F. Twomey is a physician assistant in Valhalla, New York
Stephanie Twomey practices at Westchester Medical Center in Valhalla, New York, part of Westchester Medical Center Health Network.
Stephanie Twomey's NPI, 1649599028, was assigned on May 24, 2010. Stephanie Twomey holds New York license 003478-1.
- NPI
- 1649599028NPI Registry (opens in a new tab)
- NPI enumeration date
- May 24, 2010
- NPI status
- Active
- Practice phone
- (914) 493-7000
- 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
Stephanie F. Twomey practices at Westchester Medical Center in Valhalla, New York
Stephanie Twomey's primary practice is Westchester Medical Center, at 100 Woods Rd, Valhalla, NY 10595 in Westchester County. The practice phone is (914) 493-7000.
- Westchester Medical Center100 Woods Rd, Valhalla, NY 10595 · Westchester CountyPhone(914) 493-7000
Source: Dmand AI Affiliation Data
Stephanie F. Twomey is affiliated with 1 site of care and 1 medical group
Stephanie Twomey's primary practice is Westchester Medical Center in Valhalla, New York, part of Westchester Medical Center Health Network. The medical group on file is Westchester Medical Center Advanced Physician Services.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Stephanie F. Twomey's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Stephanie Twomey practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Westchester Medical Center | 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 Westchester Medical Center Health Network and 6.2K+ hospitals, with verified contacts in the same login.
Stephanie F. Twomey is one of 11,456 physician assistants in New York
Physician assistant is Stephanie Twomey's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Stephanie Twomey is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Stephanie Twomey is licensed in New York.
Specialties and state licenses
- Physician assistant, New YorkPrimary
Physician assistants near Stephanie Twomey
Counts of physician assistants 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
Stephanie F. Twomey's patients have a median age of 33
Across all payers, Dmand AI patient panel data puts Stephanie Twomey's median patient age at 33, with 56% women.
Stephanie Twomey's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 33
Patient panel by sex, all payers
- Women56%
- Men44%
Source: Dmand AI Patient Panel Data
Stephanie F. Twomey received $20 in industry payments in 2025
CMS Open Payments shows 1 general payment to Stephanie Twomey from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $20.
Companies that paid Stephanie Twomey the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Stephanie F. Twomey is board certified in certified physician assistant
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for Stephanie F. Twomey'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) |
| 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 Stephanie F. Twomey
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Stephanie F. Twomey's NPI number?
Stephanie F. Twomey's NPI number is 1649599028. It was assigned on May 24, 2010, and it is active in the NPI Registry.
What does Stephanie F. Twomey specialize in?
Stephanie F. Twomey is a physician assistant in Valhalla, New York. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Stephanie F. Twomey practice?
Stephanie Twomey practices at 100 Woods Rd, Valhalla, NY 10595. Stephanie Twomey's primary practice is Westchester Medical Center in Valhalla, New York, part of Westchester Medical Center Health Network.
What is Stephanie F. Twomey's office phone number?
The practice phone on file for Stephanie Twomey is (914) 493-7000.
What is Stephanie F. Twomey's medical license number?
Stephanie Twomey holds New York license 003478-1.
Which hospitals is Stephanie F. Twomey affiliated with?
Stephanie Twomey practices at Westchester Medical Center in Valhalla, New York.
What medical group is Stephanie F. Twomey part of?
Stephanie Twomey is linked to Westchester Medical Center Advanced Physician Services.
Is Stephanie F. Twomey board certified?
Yes. Stephanie Twomey is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
Has Stephanie F. Twomey received payments from drug or device companies?
CMS Open Payments shows $20 in general payments to Stephanie Twomey from 1 company from 2025 to 2025. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has Stephanie F. Twomey been practicing?
Stephanie Twomey's NPI was assigned in 2010.
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