ARTHUR LOUIS LENAHAN III MD MPH
NPI 1023647062
Medical Genetics - Ph.D. Medical Genetics in Portland, OR
About Arthur Louis Lenahan Iii Md Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ARTHUR LOUIS LENAHAN III MD MPH (NPI 1023647062) is an individual ph.d. medical genetics provider in Portland, Oregon, licensed in Oregon (MD220000) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Oregon Health Sciences University School Of Medicine (2020).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Arthur Louis Lenahan Iii Md Mph is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Arthur Lenahan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, OR 97227
- Reassigned Medicare billing, Oregon enrollment
- 719 clinicians in this Medicare group
Portland, OR 97210
- Reassigned Medicare billing, Oregon enrollment
- 387 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PORTLAND, OR 97227
PORTLAND, OR 97227
PORTLAND, OR 97227
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Arthur Lenahan's NPI number?
The NPI number for Arthur Lenahan is 1023647062. It was assigned to this individual provider in the NPPES registry on April 2, 2020.
Where is Arthur Lenahan located?
Arthur Lenahan practices at 501 N Graham St Ste 330B, Portland, OR 97227. The listed phone number is (503) 944-5970.
What is Arthur Lenahan's specialty?
The primary specialty registered for this NPI is Medical Genetics, specializing in Ph.D. Medical Genetics, with taxonomy code 207SG0205X.
Is Arthur Lenahan enrolled in Medicare?
Yes. Arthur Lenahan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Arthur Lenahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Arthur Lenahan reassigns Medicare benefits to 2 organizations: Legacy Emanuel Hospital & Health Center (Portland, OR) and Legacy Good Samaritan Hospital And Medical Center (Portland, OR). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Arthur Lenahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Arthur Lenahan accept?
Health plans from BridgeSpan Health Company, Moda Health Plan, Inc., PacificSource Health Plans, Providence Health Plan and Regence BlueCross BlueShield of Oregon list Arthur Lenahan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Arthur Lenahan was last updated on February 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Arthur Louis Lenahan III, MD MPH · NPI 1023647062
Ph.D. Medical Genetics physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since April 2, 2020.
## Identity
- **NPI:** 1023647062 (Entity type: Individual)
- **Enumerated:** April 2, 2020
- **Primary specialty:** Medical Genetics - Ph.D. Medical Genetics · taxonomy 207SG0205X
- **State license:** MD220000 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 501 N GRAHAM ST STE 330B, Portland, OR 97227-2009
- **Phone:** (503) 944-5970
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Legacy Emanuel Hospital & Health Center (NPI 1831112358, Portland, OR); Legacy Good Samaritan Hospital And Medical Center (NPI 1679597108, Portland, OR) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Oregon Health Sciences University School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** February 14, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1023647062) · Data from the CMS NPPES public registry.