Mark D. Williams, PA-C
- Medicare patients, 2024
- 613
- Part D claims, 2024
- 1,181
- MIPS score, 2024
- 100
- Hospital affiliations
- 3
- Industry payments
- $307
- Practice address
- 1793 13th St Se, Salem, OR 97302-2541
- Practice phone
- Call (503) 362-8385
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Frontier Dermatology
Dermatology practice · Salem, Oregon
Find Mark 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.
Mark D. Williams is a physician assistant in Salem, Oregon
Mark Williams practices at Frontier Dermatology in Salem, Oregon.
Mark Williams' NPI, 1255369765, was assigned on June 30, 2006. Mark Williams holds Oregon license PA00623.
- NPI
- 1255369765NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547235392
- NPI enumeration date
- June 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (503) 362-8385
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark D. Williams practices at Frontier Dermatology in Salem, Oregon
Mark Williams' primary practice is Frontier Dermatology, at 1793 13th St Se, Salem, OR 97302-2541. The practice phone is (503) 362-8385.
- Frontier Dermatology1793 13th St Se, Salem, OR 97302-2541Phone(503) 362-8385
Source: Dmand AI Affiliation Data
Mark D. Williams is affiliated with 4 sites of care and 1 medical group
Mark Williams' primary practice is Frontier Dermatology in Salem, Oregon. Mark Williams is also affiliated with Samaritan Albany General Hospital. The medical group on file is Frontier Dermatology. Dmand AI also links Mark Williams to 2 more hospitals, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Mark D. Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Williams practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Frontier Dermatology | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Mark D. Williams is one of 1,937 physician assistants in Oregon
Physician assistant is Mark Williams' primary specialty in the NPI Registry, under taxonomy code 363A00000X. Mark Williams is licensed in Oregon.
Specialties and state licenses
- Physician assistant, OregonPrimary
Physician assistants near Mark Williams
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
Mark D. Williams treated 613 Medicare patients in 2024, average age 74
CMS counts 613 Medicare patients who saw Mark Williams in 2024. The largest group is 65 to 74, with 295 patients. 60% of them have high blood pressure, and 60% have high cholesterol. 10% are also on Medicaid. Their average risk score is 0.91, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Mark Williams' median patient age at 63, with 51% women.
Mark Williams' Medicare patients by age, 2024
Mark Williams' Medicare patients by sex, 2024
- Women29147%
- Men32253%
Chronic conditions among Mark Williams' Medicare patients, 2024
- High blood pressure60%
- High cholesterol60%
- Arthritis38%
- Diabetes22%
- Mood disorders18%
- Anxiety16%
- Atrial fibrillation16%
- Ischemic heart disease16%
Share of Medicare patients with each condition. A patient can have several.
Mark Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Mark D. Williams wrote 1,181 Medicare Part D claims in 2024
In 2024, Mark Williams wrote 1,181 Medicare Part D claims for 498 patients. 94% of them were for generic drugs.
Mark Williams' Part D claims by kind of drug, 2024
- Generic1,115 claims94%
- Brand-name66 claims6%
Drug classes CMS tracks in Mark Williams' Part D claims, 2024
- Antibiotics9%112 of 1,181 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
Mark D. Williams scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Mark Williams for performance year 2024, reported individually. Mark Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Mark Williams' MIPS scores, performance year 2024
- 100of 100Final score
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Mark D. Williams received $307 in industry payments in 2025
CMS Open Payments shows 18 general payments to Mark Williams from 5 drug and device companies in 2025. Food and beverage make up the largest share, 73% of the total. Janssen Pharmaceuticals, Inc paid the most, $229.
General payments to Mark Williams by kind, 2025 to 2025
- Food and beverage$22473%
- Education$8327%
Companies that paid Mark 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 Mark D. 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 Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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)Clinician Public Reporting: Overall MIPS Performance (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 Mark D. 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 Mark D. Williams' NPI number?
Mark D. Williams' NPI number is 1255369765. It was assigned on June 30, 2006, and it is active in the NPI Registry.
What does Mark D. Williams specialize in?
Mark D. Williams is a physician assistant in Salem, Oregon. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Mark D. Williams practice?
Mark Williams practices at 1793 13th St Se, Salem, OR 97302-2541. Mark Williams' primary practice is Frontier Dermatology in Salem, Oregon. Dmand AI also links Mark Williams to 2 hospitals.
What is Mark D. Williams' office phone number?
The practice phone on file for Mark Williams is (503) 362-8385.
What is Mark D. Williams' medical license number?
Mark Williams holds Oregon license PA00623.
Which hospitals is Mark D. Williams affiliated with?
Mark Williams is affiliated with Samaritan Albany General Hospital. Dmand AI links Mark Williams to 2 more hospitals.
What medical group is Mark D. Williams part of?
Mark Williams is linked to Frontier Dermatology.
Does Mark D. Williams accept Medicare?
Yes. CMS lists Mark Williams as accepting Medicare assignment.
What is Mark D. Williams' MIPS score?
Mark Williams' MIPS final score for performance year 2024 is 100 out of 100, reported individually.
How many Medicare patients does Mark D. Williams see?
CMS counts 613 Medicare patients who saw Mark Williams in 2024, with an average age of 74.
Has Mark D. Williams received payments from drug or device companies?
CMS Open Payments shows $307 in general payments to Mark Williams from 5 companies from 2025 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Mark D. Williams been practicing?
Mark Williams graduated from medical school in 1998, 28 years ago.
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