Dr. Mark Walter Layton, MD
- Medicare patients, 2024
- 263
- Part D claims, 2024
- 2,495
- MIPS score, 2024
- 23
- Hospital affiliations
- 3
- Industry payments
- $411
- Practice address
- 1212 Harrison NW Ave, Olympia, WA 98502
- Practice phone
- Call (360) 754-6700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Olympia Arthritis & Rehabilitation Clinic Inc PS
Olympia, Washington
Find Dr. Layton's professional email, personal email and mobile number
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Dr. Mark Walter Layton is a rheumatologist in Olympia, Washington
Dr. Layton practices at Olympia Arthritis & Rehabilitation Clinic Inc PS in Olympia, Washington.
Dr. Layton's NPI, 1891846077, was assigned on January 15, 2007. Dr. Layton graduated from University of Washington School of Medicine in 1982. Dr. Layton holds Washington license MD00024518.
- NPI
- 1891846077NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456244193
- NPI enumeration date
- January 15, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (360) 754-6700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Walter Layton practices at Olympia Arthritis & Rehabilitation Clinic Inc PS in Olympia, Washington
Dr. Layton's primary practice is Olympia Arthritis & Rehabilitation Clinic Inc PS, at 1212 Harrison NW Ave, Olympia, WA 98502 in Thurston County. The practice phone is (360) 754-6700.
- Olympia Arthritis & Rehabilitation Clinic Inc PS1212 Harrison NW Ave, Olympia, WA 98502 · Thurston CountyPhone(360) 754-6700
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Walter Layton is affiliated with 5 sites of care and 1 medical group
Dr. Layton's primary practice is Olympia Arthritis & Rehabilitation Clinic Inc PS in Olympia, Washington. Dr. Layton is also affiliated with Summit Pacific Medical Center. The medical group on file is Olympia Arthritis Clinic. Dmand AI also links Dr. Layton to 2 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark Walter Layton's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Layton practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Olympia Arthritis & Rehabilitation Clinic Inc PS | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Walter Layton is one of 156 rheumatologists in Washington
Rheumatology is Dr. Layton's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Layton is licensed in Washington.
Specialties and state licenses
- Rheumatology, WashingtonPrimary
Rheumatologists near Dr. Layton
Counts of rheumatologists 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. Mark Walter Layton treated 263 Medicare patients in 2024, average age 74
CMS counts 263 Medicare patients who saw Dr. Layton in 2024. The largest group is 75 to 84, with 113 patients. 75% of them have arthritis, and 71% have high blood pressure. 10% are also on Medicaid. Their average risk score is 1.34, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Layton's median patient age at 72, with 68% women.
Dr. Layton's Medicare patients by age, 2024
Dr. Layton's Medicare patients by sex, 2024
- Women18269%
- Men8131%
Chronic conditions among Dr. Layton's Medicare patients, 2024
- Arthritis75%
- High blood pressure71%
- High cholesterol63%
- Mood disorders23%
- Depression22%
- Diabetes22%
- Ischemic heart disease21%
- Chronic kidney disease20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Layton's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women68%
- Men31%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Walter Layton wrote 2,495 Medicare Part D claims in 2024
In 2024, Dr. Layton wrote 2,495 Medicare Part D claims for 288 patients. 90% of them were for generic drugs.
Dr. Layton's Part D claims by kind of drug, 2024
- Generic2,249 claims90%
- Brand-name246 claims10%
Drug classes CMS tracks in Dr. Layton's Part D claims, 2024
- Opioids30%745 of 2,495 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
Dr. Mark Walter Layton scored 23 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 23 out of 100 for Dr. Layton for performance year 2024, reported individually. Dr. Layton accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Layton's MIPS scores, performance year 2024
- 23of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 76of 100Cost
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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Dr. Mark Walter Layton received $411 in industry payments in 2025
CMS Open Payments shows 21 general payments to Dr. Layton from 4 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $302.
Companies that paid Dr. Layton the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Walter Layton graduated from University of Washington School of Medicine
Dr. Layton graduated from University of Washington School of Medicine in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Walter Layton'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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 Dr. Mark Walter Layton
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. Mark Walter Layton's NPI number?
Dr. Mark Walter Layton's NPI number is 1891846077. It was assigned on January 15, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Walter Layton?
Dr. Mark Walter Layton is a rheumatologist in Olympia, Washington. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Mark Walter Layton practice?
Dr. Layton practices at 1212 Harrison NW Ave, Olympia, WA 98502. Dr. Layton's primary practice is Olympia Arthritis & Rehabilitation Clinic Inc PS in Olympia, Washington. Dmand AI also links Dr. Layton to 2 hospitals and 1 group practice or clinic.
What is Dr. Mark Walter Layton's office phone number?
The practice phone on file for Dr. Layton is (360) 754-6700.
What is Dr. Mark Walter Layton's medical license number?
Dr. Layton holds Washington license MD00024518.
Which hospitals is Dr. Mark Walter Layton affiliated with?
Dr. Layton is affiliated with Summit Pacific Medical Center. Dmand AI links Dr. Layton to 2 more hospitals.
What medical group is Dr. Mark Walter Layton part of?
Dr. Layton is linked to Olympia Arthritis Clinic.
Does Dr. Mark Walter Layton accept Medicare?
Yes. CMS lists Dr. Layton as accepting Medicare assignment.
What is Dr. Mark Walter Layton's MIPS score?
Dr. Layton's MIPS final score for performance year 2024 is 23 out of 100, reported individually.
How many Medicare patients does Dr. Mark Walter Layton see?
CMS counts 263 Medicare patients who saw Dr. Layton in 2024, with an average age of 74.
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Where did Dr. Mark Walter Layton go to medical school?
Dr. Layton graduated from University of Washington School of Medicine in 1982.
Has Dr. Mark Walter Layton received payments from drug or device companies?
CMS Open Payments shows $411 in general payments to Dr. Layton from 4 companies from 2025 to 2025. The largest total came from Amgen Inc.
How long has Dr. Mark Walter Layton been practicing?
Dr. Layton graduated from medical school in 1982, 44 years ago.
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