Sylas G. Mason
- Part D claims, 2024
- 106
- Hospital affiliations
- 1
- Industry payments
- $106
- Medical groups
- 3
- State license
- 1
- Practice address
- 1840 Amherst St, Winchester, VA 22601
- Practice phone
- Call (540) 536-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Sylas Mason's professional email, personal email and mobile number
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Sylas G. Mason is a physician assistant in Winchester, Virginia
Sylas Mason practices at Winchester Medical Center in Winchester, Virginia, part of Valley Health.
Sylas Mason's NPI, 1467103366, was assigned on January 12, 2022. Sylas Mason holds Virginia license 0110010607.
- NPI
- 1467103366NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9931569621
- NPI enumeration date
- January 12, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (540) 536-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 29
- Medical school graduation
- 2023
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Sylas G. Mason practices at Winchester Medical Center in Winchester, Virginia
Sylas Mason's primary practice is Winchester Medical Center, at 1840 Amherst St, Winchester, VA 22601 in Winchester City. The practice phone is (540) 536-8000.
- Winchester Medical Center1840 Amherst St, Winchester, VA 22601 · Winchester CityPhone(540) 536-8000
Source: Dmand AI Affiliation Data
Sylas G. Mason is affiliated with 3 sites of care and 3 medical groups
Sylas Mason's primary practice is Winchester Medical Center in Winchester, Virginia, part of Valley Health. The medical group on file is Valley Health. Dmand AI also links Sylas Mason to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Sylas G. Mason's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Sylas Mason practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Winchester Medical Center | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Sylas G. Mason is one of 3,636 physician assistants in Virginia
Physician assistant is Sylas Mason's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Sylas Mason is licensed in Virginia.
Specialties and state licenses
- Physician assistant, VirginiaPrimary
Physician assistants near Sylas Mason
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
Sylas G. Mason's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Sylas Mason's median patient age at 67, with 24% women.
Sylas Mason's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women24%
- Men75%
Source: Dmand AI Patient Panel Data
Sylas G. Mason wrote 106 Medicare Part D claims in 2024
In 2024, Sylas Mason wrote 106 Medicare Part D claims for 33 patients. 91% of them were for generic drugs.
Sylas Mason's Part D claims by kind of drug, 2024
- Generic96 claims91%
- Brand-name and other10 claims9%
Drug classes CMS tracks in Sylas Mason's Part D claims, 2024
- Opioids17%18 of 106 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
How Sylas G. Mason takes part in Medicare
Sylas Mason 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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Sylas G. Mason received $106 in industry payments in 2025
CMS Open Payments shows 1 general payment to Sylas Mason from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. MAQUET Cardiovascular U.S. Sales, L.L.C. paid the most, $106.
Companies that paid Sylas Mason 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 Sylas G. Mason'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 (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 Sylas G. Mason
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Sylas G. Mason's NPI number?
Sylas G. Mason's NPI number is 1467103366. It was assigned on January 12, 2022, and it is active in the NPI Registry.
What does Sylas G. Mason specialize in?
Sylas G. Mason is a physician assistant in Winchester, Virginia. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Sylas G. Mason practice?
Sylas Mason practices at 1840 Amherst St, Winchester, VA 22601. Sylas Mason's primary practice is Winchester Medical Center in Winchester, Virginia, part of Valley Health. Dmand AI also links Sylas Mason to 2 group practices and clinics and 2 medical groups.
What is Sylas G. Mason's office phone number?
The practice phone on file for Sylas Mason is (540) 536-8000.
What is Sylas G. Mason's medical license number?
Sylas Mason holds Virginia license 0110010607.
Which hospitals is Sylas G. Mason affiliated with?
Sylas Mason practices at Winchester Medical Center in Winchester, Virginia.
What medical group is Sylas G. Mason part of?
Sylas Mason is linked to Valley Health. Dmand AI links Sylas Mason to 2 more medical groups.
Does Sylas G. Mason accept Medicare?
Yes. CMS lists Sylas Mason as accepting Medicare assignment.
Has Sylas G. Mason received payments from drug or device companies?
CMS Open Payments shows $106 in general payments to Sylas Mason from 1 company from 2025 to 2025. The largest total came from MAQUET Cardiovascular U.S. Sales, L.L.C.
How long has Sylas G. Mason been practicing?
Sylas Mason graduated from medical school in 2023, 3 years ago.
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