William Marrin, PhD
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2005
- Practice locations
- 2
- Practice address
- 200 Belle Terre Road, Port Jefferson, NY 11777
- Practice phone
- Call (631) 474-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find William Marrin'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.
William Marrin is a psychologist in Huntington, New York
William Marrin practices at Good Samaritan University Hospital St. Charles Campus in Port Jefferson, New York, part of Diocese of Rockville Centre.
William Marrin's NPI, 1861493629, was assigned on August 2, 2005. William Marrin holds New York license 008777.
- NPI
- 1861493629NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092744276
- NPI enumeration date
- August 2, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (631) 474-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
William Marrin practices in Port Jefferson and Huntington
William Marrin's primary practice is Good Samaritan University Hospital St. Charles Campus, at 200 Belle Terre Road, Port Jefferson, NY 11777 in Suffolk County. The practice phone is (631) 474-6000. The NPI Registry lists William Marrin's practice address as 175 E Main St, Huntington, NY 11743.
- Good Samaritan University Hospital St. Charles CampusPrimary200 Belle Terre Road, Port Jefferson, NY 11777 · Suffolk CountyPhone(631) 474-6000
- NPI Registry address175 E Main St, Huntington, NY 11743 · Suffolk County
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
William Marrin is affiliated with 1 site of care and 1 medical group
William Marrin's primary practice is Good Samaritan University Hospital St. Charles Campus in Port Jefferson, New York, part of Diocese of Rockville Centre. The medical group on file is St. Charles Hospital.
Sources: Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at William Marrin's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Marrin practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Good Samaritan University Hospital St. Charles Campus | 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 Diocese of Rockville Centre and 6.2K+ hospitals, with verified contacts in the same login.
William Marrin is one of 1,198 psychologists in New York
Psychologist is William Marrin's primary specialty in the NPI Registry, under taxonomy code 103T00000X. William Marrin is licensed in New York.
Specialties and state licenses
- Psychologist, New YorkPrimary
Psychologists near William Marrin
Counts of psychologists 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
William Marrin's patients have a median age of 54
Across all payers, Dmand AI patient panel data puts William Marrin's median patient age at 54, with 0% women.
William Marrin's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
How William Marrin takes part in Medicare
William Marrin accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for William Marrin'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 William Marrin
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William Marrin's NPI number?
William Marrin's NPI number is 1861493629. It was assigned on August 2, 2005, and it is active in the NPI Registry.
What does William Marrin specialize in?
William Marrin is a psychologist in Huntington, New York. The primary specialty in the NPI Registry is Psychologist (taxonomy code 103T00000X).
Where does William Marrin practice?
William Marrin practices at 200 Belle Terre Road, Port Jefferson, NY 11777. William Marrin also practices at 175 E Main St, Huntington, NY 11743. William Marrin's primary practice is Good Samaritan University Hospital St. Charles Campus in Port Jefferson, New York, part of Diocese of Rockville Centre.
What is William Marrin's office phone number?
The practice phone on file for William Marrin is (631) 474-6000.
What is William Marrin's medical license number?
William Marrin holds New York license 008777.
Which hospitals is William Marrin affiliated with?
William Marrin practices at Good Samaritan University Hospital St. Charles Campus in Port Jefferson, New York.
What medical group is William Marrin part of?
William Marrin is linked to St. Charles Hospital.
Does William Marrin accept Medicare?
Yes. CMS lists William Marrin as accepting Medicare assignment.
How long has William Marrin been practicing?
William Marrin graduated from medical school in 1984, 42 years ago.
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