What is Arthur Lenahan's NPI number?

Arthur Lenahan's National Provider Identifier (NPI) is 1023647062, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Arthur Lenahan's specialty?

Arthur Lenahan is listed in the NPPES registry with a primary specialty of Ph.D. Medical Genetics Physician (Allopathic & Osteopathic Physicians).

Where is Arthur Lenahan located?

Arthur Lenahan's practice location on file with NPPES is 501 N Graham St Ste 330b, Portland, OR 97227-2009.

What is Arthur Lenahan's phone number?

The practice phone number listed in the NPPES registry for Arthur Lenahan is (503) 944-5970.

Does Arthur Lenahan accept Medicare?

Arthur Lenahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Arthur Lenahan's NPI active?

Yes — Arthur Lenahan's NPI (1023647062) is active in the NPPES registry as of the last update on 2025-02-14.

IndividualActiveAccepts Medicare

Arthur Lenahan, MD MPH

NPI 1023647062 · Ph.D. Medical Genetics Physician · Portland, OR

Enrolled with Medicare as Practitioner - Medical Genetics and Genomics · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Arthur Lenahan, MD MPH is a Ph.D. Medical Genetics Physician provider in Portland, OR (NPI 1023647062).

Provider details

NPI number: 1023647062
Entity type: Individual
Primary specialty: Ph.D. Medical Genetics PhysicianAllopathic & Osteopathic Physicians
Credential: MD MPH
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Ph.D. Medical Genetics PhysicianPrimary207SG0205XLicense MD220000 (OR)
Allopathic & Osteopathic Physicians
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care

Profile Score

Established profile(67/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
6 yrs in NPPES registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
4 documented practice locations

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

501 N Graham St Ste 330b

Portland, OR 97227-2009

Phone: (503) 944-5970

Street-level locationGet directions

More OR providers

Mailing address

Po Box 4399

Portland, OR 97208-4399

Additional practice locations (3)

1040 Nw 22nd Ave Ste Ll030
Portland, OR 97210-3057
Phone: (503) 413-7702
2801 N Gantenbein Ave Fl 3
Portland, OR 97227-1623
Phone: (503) 276-9300
4800 Sand Point Way Ne # Oc.7830
Seattle, WA 98105-3901
Phone: (206) 987-2000

Enumerated: 2020-04-02
Last updated: 2025-02-14
Certified: 2025-02-14

Frequently asked questions

What is Arthur Lenahan's NPI number?: Arthur Lenahan's National Provider Identifier (NPI) is 1023647062, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Arthur Lenahan's specialty?: Arthur Lenahan is listed in the NPPES registry with a primary specialty of Ph.D. Medical Genetics Physician (Allopathic & Osteopathic Physicians).
Where is Arthur Lenahan located?: Arthur Lenahan's practice location on file with NPPES is 501 N Graham St Ste 330b, Portland, OR 97227-2009.
What is Arthur Lenahan's phone number?: The practice phone number listed in the NPPES registry for Arthur Lenahan is (503) 944-5970.
Does Arthur Lenahan accept Medicare?: Arthur Lenahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Arthur Lenahan's NPI active?: Yes — Arthur Lenahan's NPI (1023647062) is active in the NPPES registry as of the last update on 2025-02-14.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.