What is William Barker's NPI number?

William Barker's National Provider Identifier (NPI) is 1699873422, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Barker's specialty?

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

Where is William Barker located?

William Barker's practice location on file with NPPES is 200 4th Ave West, Grinnell, IA 50112.

What is William Barker's phone number?

The practice phone number listed in the NPPES registry for William Barker is (641) 236-6137.

Is William Barker's NPI active?

Yes — William Barker's NPI (1699873422) is active in the NPPES registry as of the last update on 2007-07-08.

IndividualActive

William Barker, LISW

NPI 1699873422 · Social Worker · Grinnell, IA

William Barker, LISW is a Social Worker provider in Grinnell, IA (NPI 1699873422).

Provider details

NPI number: 1699873422
Entity type: Individual
Primary specialty: Social WorkerBehavioral Health & Social Service Providers
Credential: LISW
Sex: Male
Sole proprietor: No
License: 00976 (IA)

Practice location

200 4th Ave West

Grinnell, IA 50112

Phone: (641) 236-6137

Fax: (641) 236-0206

Street-level locationGet directions

More IA providers

Mailing address

200 4th Ave West

Grinnell, IA 50112

Specialties & taxonomies

Social WorkerPrimary104100000XLicense 00976 (IA)
Behavioral Health & Social Service Providers

Profile Score

Detailed profile(91/100 index)

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

Registry tenure38% of score
20 yrs in NPPES registry
Profile completeness38% of score
100% 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.

Enumerated: 2006-09-20
Last updated: 2007-07-08

Frequently asked questions

What is William Barker's NPI number?: William Barker's National Provider Identifier (NPI) is 1699873422, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is William Barker's specialty?: William Barker is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
Where is William Barker located?: William Barker's practice location on file with NPPES is 200 4th Ave West, Grinnell, IA 50112.
What is William Barker's phone number?: The practice phone number listed in the NPPES registry for William Barker is (641) 236-6137.
Is William Barker's NPI active?: Yes — William Barker's NPI (1699873422) is active in the NPPES registry as of the last update on 2007-07-08.

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

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions