Decision Making, SharedDecision Support TechniquesEmergency Service, Hospital
Dr. Leanora Walker Merwin, DO
NPI1740673078PAC ID9931479631
- Medicare services, 2024
- 151
- Medicare patients, 2024
- 111
- Part D claims, 2024
- 200
- Publications
- 1
- MIPS score, 2024
- 97
- Practice address
- 24800 Se Stark Street, Gresham, OR 97030
- Practice phone
- Call (503) 674-1122
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Merwin'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.
Dr. Leanora Walker Merwin is an emergency medicine physician in Gresham, Oregon
Dr. Merwin practices at Legacy Mount Hood Medical Center in Gresham, Oregon, part of Legacy Health.
Dr. Merwin's NPI, 1740673078, was assigned on March 11, 2015. Dr. Merwin holds Oregon license DO202931.
NPI and contact details
- NPI
- 1740673078NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9931479631
- NPI enumeration date
- March 11, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (503) 674-1122
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Leanora Walker Merwin practices at Legacy Mount Hood Medical Center in Gresham, Oregon
Dr. Merwin's primary practice is Legacy Mount Hood Medical Center, at 24800 Se Stark Street, Gresham, OR 97030 in Multnomah County. The practice phone is (503) 674-1122.
- Legacy Mount Hood Medical Center24800 Se Stark Street, Gresham, OR 97030 · Multnomah CountyPhone(503) 674-1122
Source: Dmand AI Affiliation Data
Dr. Leanora Walker Merwin is affiliated with 2 sites of care and 5 medical groups
Dr. Merwin's primary practice is Legacy Mount Hood Medical Center in Gresham, Oregon, part of Legacy Health. Dr. Merwin is also affiliated with Samaritan Pacific Communities Hospital. The medical group on file is Kaiser Permanente Northwest. Dmand AI also links Dr. Merwin to 4 more medical groups, each named with a free account.
Samaritan Pacific Communities HospitalKaiser Permanente Northwest4 medical groupsNames with a free account
See all 7 affiliations for Dr. MerwinSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Leanora Walker Merwin's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merwin practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Legacy Mount Hood Medical Center | Available with a free account |
| +1 more site and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Leanora Walker Merwin is one of 962 emergency medicine physicians in Oregon
Emergency medicine is Dr. Merwin's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Merwin's licenses on file in 2 states: Oregon and Massachusetts.
Specialties and state licenses
- Emergency medicine, OregonPrimary
- Massachusetts license
Emergency medicine physicians near Dr. Merwin
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
962emergency medicine physicians in Oregon16emergency medicine physicians in Gresham16emergency medicine physicians at Legacy Mount Hood Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Leanora Walker Merwin billed Medicare for 151 services in 2024
CMS data shows 151 Medicare services from Dr. Merwin across 4 procedure codes in 2024, for 111 Medicare patients. Medicare paid $12,914 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024151
Medicare patients111
Paid by Medicare$12,914
Procedure codes4
Dr. Merwin's Medicare services by type, 2021 to 2024
- 2021
- 2024
- Office and hospital visits
- 2021: 1802024: 10343%
- Tests and treatments
- 2021: 122024: 48300%
- Imaging
- 2021: 122024: 0100%
- Surgery
- 2021: 112024: 0100%
Dr. Merwin compared with the Oregon median for emergency medicine physicians, 2024
- Dr. Merwin
- Oregon median
- Medicare services
- 151vs 17715% below
- Medicare patients
- 111vs 18139% below
- Part D claims
- 112vs 492.3 times
Medians across 1,000 emergency medicine physicians in Oregon with Dmand AI profiles that report each measure.
Dr. Merwin's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Merwin?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Merwin and other emergency medicine physicians in Oregon.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leanora Walker Merwin treated 111 Medicare patients in 2024, average age 67
CMS counts 111 Medicare patients who saw Dr. Merwin in 2024. The largest group is 65 to 74, with 37 patients. 75% of them have high blood pressure, and 60% have high cholesterol. 44% are also on Medicaid. Their average risk score is 1.60, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Merwin's median patient age at 39, with 55% women.
Medicare patients, 2024111
Average age67
Average risk score1.60
Also on Medicaid44%
Dr. Merwin's Medicare patients by age, 2024
Dr. Merwin's Medicare patients by sex, 2024
- Women5146%
- Men6054%
Chronic conditions among Dr. Merwin's Medicare patients, 2024
- High blood pressure75%
- High cholesterol60%
- Mood disorders44%
- Anxiety39%
- Depression37%
- Diabetes32%
- Arthritis30%
- Ischemic heart disease29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Merwin's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 39
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Leanora Walker Merwin wrote 200 Medicare Part D claims in 2024
In 2024, Dr. Merwin wrote 200 Medicare Part D claims for 141 patients. 93% of them were for generic drugs. CMS names the drug for 112 of them, across 6 drugs with 11 or more claims each, at $601 in total drug cost. In 2023, CMS named 167 claims across 8 drugs.
Part D claims, 2024200
Drugs named by CMS6
Total drug cost$601
Part D patients141
Dr. Merwin's Part D claims by kind of drug, 2024
- Generic185 claims93%
- Brand-name15 claims8%
Dr. Merwin's 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. Merwin's Part D claims, 2024
- Opioids7%13 of 200 claims
- Antibiotics30%60 of 200 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1672024: 11233%
Drugs named by CMS: 6 in 2024, 8 in 2023.
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
Dr. Leanora Walker Merwin scored 97 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Dr. Merwin for performance year 2024, reported as part of a group. Dr. Merwin accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Merwin's MIPS scores, performance year 2024
- 97of 100Final score
- 84.9of 100Quality
- 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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Dr. Leanora Walker Merwin has 1 publication on record
Dmand AI links 1 paper to Dr. Merwin in 2020. Dr. Merwin's most frequent co-authors are Erik Paul Hess, MD, Connor J. Houghton, DO and Pooja Mitul Patel.
Papers1
Dr. Merwin's most frequent co-authors
Recent publications by Dr. Merwin
See who Dr. Merwin researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Merwin works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Sources for Dr. Leanora Walker Merwin'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Leanora Walker Merwin
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. Leanora Walker Merwin's NPI number?
Dr. Leanora Walker Merwin's NPI number is 1740673078. It was assigned on March 11, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Leanora Walker Merwin?
Dr. Leanora Walker Merwin is an emergency medicine physician in Gresham, Oregon. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Leanora Walker Merwin practice?
Dr. Merwin practices at 24800 Se Stark Street, Gresham, OR 97030. Dr. Merwin's primary practice is Legacy Mount Hood Medical Center in Gresham, Oregon, part of Legacy Health. Dmand AI also links Dr. Merwin to 4 medical groups.
What is Dr. Leanora Walker Merwin's office phone number?
The practice phone on file for Dr. Merwin is (503) 674-1122.
What is Dr. Leanora Walker Merwin's medical license number?
Dr. Merwin holds Oregon license DO202931, one of the licenses on file in 2 states.
Which states has Dr. Leanora Walker Merwin been licensed in?
Dmand AI has state licenses on file for Dr. Merwin in Oregon and Massachusetts.
Which hospitals is Dr. Leanora Walker Merwin affiliated with?
Dr. Merwin practices at Legacy Mount Hood Medical Center in Gresham, Oregon. Dr. Merwin is also affiliated with Samaritan Pacific Communities Hospital.
What medical group is Dr. Leanora Walker Merwin part of?
Dr. Merwin is linked to Kaiser Permanente Northwest. Dmand AI links Dr. Merwin to 4 more medical groups.
Does Dr. Leanora Walker Merwin accept Medicare?
Yes. CMS data shows Dr. Merwin billed Medicare for 151 services in 2024, and Dr. Merwin accepts Medicare assignment.
What is Dr. Leanora Walker Merwin's MIPS score?
Dr. Merwin's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Leanora Walker Merwin see?
CMS counts 111 Medicare patients who saw Dr. Merwin in 2024, with an average age of 67.
What services does Dr. Leanora Walker Merwin bill to Medicare?
In 2024, Dr. Merwin's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
What drugs does Dr. Leanora Walker Merwin prescribe most?
In 2024 Medicare Part D data, Dr. Merwin's most prescribed drugs by claims were Ondansetron ODT, Methocarbamol and Cephalexin.
How long has Dr. Leanora Walker Merwin been practicing?
Dr. Merwin graduated from medical school in 2017, 9 years ago.
Does Dr. Leanora Walker Merwin do research?
Dmand AI links 1 publication to Dr. Merwin.
Who does Dr. Leanora Walker Merwin publish with?
Dr. Merwin's most frequent co-authors are Erik Paul Hess, MD (1 shared paper), Connor J. Houghton, DO (1 shared paper) and Pooja Mitul Patel (1 shared paper).
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