Dr. James Andrew Williams, MD
- Part D claims, 2024
- 61
- Hospital affiliations
- 6
- Industry payments
- $149
- Medical groups
- 7
- State license
- 1
- 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 Dr. Williams' 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.
Dr. James Andrew Williams is an emergency medicine physician in Port Jefferson, New York
Dr. Williams practices at Mather Hospital in Port Jefferson, New York, part of Northwell Health.
Dr. Williams' NPI, 1083355879, was assigned on April 5, 2022. Dr. Williams holds California license A198652.
- NPI
- 1083355879NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3870022957
- NPI enumeration date
- April 5, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (631) 473-1320
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Andrew Williams practices at Mather Hospital in Port Jefferson, New York
Dr. Williams' 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
Dr. James Andrew Williams is affiliated with 7 sites of care and 7 medical groups
Dr. Williams' primary practice is Mather Hospital in Port Jefferson, New York, part of Northwell Health. Dr. Williams is also affiliated with Griffin Hospital. The medical group on file is Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI also links Dr. Williams to 4 more hospitals, 6 medical groups and 1 skilled nursing facility, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James Andrew Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices, 7 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 |
| +6 more sites and 6 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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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.
Dr. James Andrew Williams is one of 3,709 emergency medicine physicians in New York
Emergency medicine is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Williams is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. Williams
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
Dr. James Andrew Williams' patients have a median age of 52
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 52, with 54% women.
Dr. Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women54%
- Men45%
Source: Dmand AI Patient Panel Data
Dr. James Andrew Williams wrote 61 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 61 Medicare Part D claims for 43 patients. 89% of them were for generic drugs. CMS names the drug for 19 of them, across 1 drug with 11 or more claims each, at $64 in total drug cost.
Dr. Williams' Part D claims by kind of drug, 2024
- Generic54 claims89%
- Brand-name and other7 claims11%
Dr. Williams' 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 Dr. Williams' Part D claims, 2024
- Antibiotics69%42 of 61 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
How Dr. James Andrew Williams takes part in Medicare
Dr. Williams 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)
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Dr. James Andrew Williams received $149 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Williams from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. BTG International, Inc. paid the most, $149.
Companies that paid Dr. Williams 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 Dr. James Andrew Williams'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 |
| 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 | Doctors and Clinicians National Downloadable File (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 Dr. James Andrew Williams
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. James Andrew Williams' NPI number?
Dr. James Andrew Williams' NPI number is 1083355879. It was assigned on April 5, 2022, and it is active in the NPI Registry.
What kind of doctor is Dr. James Andrew Williams?
Dr. James Andrew Williams is an emergency medicine physician in Port Jefferson, New York. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. James Andrew Williams practice?
Dr. Williams practices at 75 North Country Road, Port Jefferson, NY 11777. Dr. Williams' primary practice is Mather Hospital in Port Jefferson, New York, part of Northwell Health. Dmand AI also links Dr. Williams to 4 hospitals, 6 medical groups and 1 skilled nursing facility.
What is Dr. James Andrew Williams' office phone number?
The practice phone on file for Dr. Williams is (631) 473-1320.
What is Dr. James Andrew Williams' medical license number?
Dr. Williams holds California license A198652.
Which hospitals is Dr. James Andrew Williams affiliated with?
Dr. Williams practices at Mather Hospital in Port Jefferson, New York. Dr. Williams is also affiliated with Griffin Hospital. Dmand AI links Dr. Williams to 4 more hospitals.
What medical group is Dr. James Andrew Williams part of?
Dr. Williams is linked to Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI links Dr. Williams to 6 more medical groups.
Does Dr. James Andrew Williams accept Medicare?
Yes. CMS lists Dr. Williams as accepting Medicare assignment.
What drugs does Dr. James Andrew Williams prescribe most?
In 2024 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Cephalexin.
Has Dr. James Andrew Williams received payments from drug or device companies?
CMS Open Payments shows $149 in general payments to Dr. Williams from 1 company from 2025 to 2025. The largest total came from BTG International, Inc.
How long has Dr. James Andrew Williams been practicing?
Dr. Williams graduated from medical school in 2021, 5 years ago.
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