Landon Masterfield, PA-C
- Medicare patients, 2024
- 136
- Part D claims, 2024
- 143
- Hospital affiliations
- 1
- Industry payments
- $43
- Medical groups
- 6
- Practice address
- 9115 SW Oleson Rd, Portland, OR 97223
- Practice phone
- Call (503) 245-2420
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northwest Extremity Specialists
Portland, Oregon
Find Landon Masterfield'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.
Landon Masterfield is a physician assistant in Portland, Oregon
Landon Masterfield practices at Northwest Extremity Specialists in Portland, Oregon.
Landon Masterfield's NPI, 1861802944, was assigned on April 29, 2014. Landon Masterfield holds Oregon license PA174776.
- NPI
- 1861802944NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6800103961
- NPI enumeration date
- April 29, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (503) 245-2420
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Landon Masterfield practices at Northwest Extremity Specialists in Portland, Oregon
Landon Masterfield's primary practice is Northwest Extremity Specialists, at 9115 SW Oleson Rd, Portland, OR 97223 in Washington County. The practice phone is (503) 245-2420.
- Northwest Extremity Specialists9115 SW Oleson Rd, Portland, OR 97223 · Washington CountyPhone(503) 245-2420
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Landon Masterfield is affiliated with 3 sites of care and 6 medical groups
Landon Masterfield's primary practice is Northwest Extremity Specialists in Portland, Oregon. Landon Masterfield is also affiliated with Providence Medford Medical Center. The medical group on file is Northwest Extremity Specialists. Dmand AI also links Landon Masterfield to 5 more medical groups 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 Landon Masterfield's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Landon Masterfield practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwest Extremity Specialists | Available with a free account |
| +2 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Landon Masterfield is one of 618 physician assistants in Oregon
Medical is Landon Masterfield's primary specialty in the NPI Registry, under taxonomy code 363AM0700X. Landon Masterfield is licensed in Oregon.
Specialties and state licenses
- Medical physician assistant, OregonPrimary
Physician assistants near Landon Masterfield
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
Landon Masterfield treated 136 Medicare patients in 2024, average age 73
CMS counts 136 Medicare patients who saw Landon Masterfield in 2024. The largest group is 65 to 74, with 63 patients. 66% of them have high cholesterol, and 59% have high blood pressure. 11% are also on Medicaid. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Landon Masterfield's median patient age at 58, with 58% women.
Landon Masterfield's Medicare patients by age, 2024
Landon Masterfield's Medicare patients by sex, 2024
- Women8462%
- Men5238%
Chronic conditions among Landon Masterfield's Medicare patients, 2024
- High cholesterol66%
- High blood pressure59%
- Arthritis49%
- Anxiety26%
- Mood disorders25%
- Depression24%
- Chronic kidney disease21%
- Diabetes21%
Share of Medicare patients with each condition. A patient can have several.
Landon Masterfield's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Landon Masterfield wrote 143 Medicare Part D claims in 2024
In 2024, Landon Masterfield wrote 143 Medicare Part D claims for 114 patients. 90% of them were for generic drugs.
Landon Masterfield's Part D claims by kind of drug, 2024
- Generic129 claims90%
- Brand-name14 claims10%
Drug classes CMS tracks in Landon Masterfield's Part D claims, 2024
- Antibiotics45%64 of 143 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 Landon Masterfield takes part in Medicare
Landon Masterfield 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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Landon Masterfield received $43 in industry payments in 2025
CMS Open Payments shows 1 general payment to Landon Masterfield from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. DePuy Synthes Sales Inc. paid the most, $43.
Companies that paid Landon Masterfield 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 Landon Masterfield'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) |
| 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 Landon Masterfield
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Landon Masterfield's NPI number?
Landon Masterfield's NPI number is 1861802944. It was assigned on April 29, 2014, and it is active in the NPI Registry.
What does Landon Masterfield specialize in?
Landon Masterfield is a physician assistant in Portland, Oregon. The primary specialty in the NPI Registry is Medical Physician Assistant (taxonomy code 363AM0700X).
Where does Landon Masterfield practice?
Landon Masterfield practices at 9115 SW Oleson Rd, Portland, OR 97223. Landon Masterfield's primary practice is Northwest Extremity Specialists in Portland, Oregon. Dmand AI also links Landon Masterfield to 5 medical groups and 1 group practice or clinic.
What is Landon Masterfield's office phone number?
The practice phone on file for Landon Masterfield is (503) 245-2420.
What is Landon Masterfield's medical license number?
Landon Masterfield holds Oregon license PA174776, one of 2 state licenses on file.
Which hospitals is Landon Masterfield affiliated with?
Landon Masterfield is affiliated with Providence Medford Medical Center.
What medical group is Landon Masterfield part of?
Landon Masterfield is linked to Northwest Extremity Specialists. Dmand AI links Landon Masterfield to 5 more medical groups.
Does Landon Masterfield accept Medicare?
Yes. CMS lists Landon Masterfield as accepting Medicare assignment.
How many Medicare patients does Landon Masterfield see?
CMS counts 136 Medicare patients who saw Landon Masterfield in 2024, with an average age of 73.
Has Landon Masterfield received payments from drug or device companies?
CMS Open Payments shows $43 in general payments to Landon Masterfield from 1 company from 2025 to 2025. The largest total came from DePuy Synthes Sales Inc.
How long has Landon Masterfield been practicing?
Landon Masterfield graduated from medical school in 2015, 11 years ago.
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