What is William Mayer's NPI number?

William Mayer's National Provider Identifier (NPI) is 1346388543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Mayer's specialty?

William Mayer is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).

Where is William Mayer located?

William Mayer's practice location on file with NPPES is 14600 Nw Cornell Rd, Portland, OR 97229-5442.

What is William Mayer's phone number?

The practice phone number listed in the NPPES registry for William Mayer is (503) 645-9581.

Is William Mayer's NPI active?

Yes — William Mayer's NPI (1346388543) is active in the NPPES registry as of the last update on 2011-11-18.

IndividualActive

William Mayer, QMHA

NPI 1346388543 · Social Worker · Portland, OR

William Mayer, QMHA is a Social Worker provider in Portland, OR (NPI 1346388543).

Provider details

NPI number: 1346388543
Entity type: Individual
Primary specialty: Social WorkerBehavioral Health & Social Service Providers
Credential: QMHA
Sex: Male
Sole proprietor: Yes

Specialties & taxonomies

Social WorkerPrimary104100000X
Behavioral Health & Social Service Providers
Nurse's Aide376K00000X
Nursing Service Related Providers

Profile Score

Detailed profile(83/100 index)

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

Registry tenure38% of score
19 yrs in NPPES registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
1 documented practice location

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

14600 Nw Cornell Rd

Portland, OR 97229-5442

Phone: (503) 645-9581

Street-level locationGet directions

More OR providers

Mailing address

14255 Sw Brigadoon Ct Ste 80

Beaverton, OR 97005-3368

Enumerated: 2007-02-01
Last updated: 2011-11-18

Frequently asked questions

What is William Mayer's NPI number?: William Mayer's National Provider Identifier (NPI) is 1346388543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is William Mayer's specialty?: William Mayer is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
Where is William Mayer located?: William Mayer's practice location on file with NPPES is 14600 Nw Cornell Rd, Portland, OR 97229-5442.
What is William Mayer's phone number?: The practice phone number listed in the NPPES registry for William Mayer is (503) 645-9581.
Is William Mayer's NPI active?: Yes — William Mayer's NPI (1346388543) is active in the NPPES registry as of the last update on 2011-11-18.

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