What is William Karr's NPI number?

William Karr's National Provider Identifier (NPI) is 1861352569, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Karr's specialty?

William Karr is listed in the NPPES registry with a primary specialty of Independent Duty Corpsman (Other Service Providers).

Where is William Karr located?

William Karr's practice location on file with NPPES is 1450 Market St Apt 359, San Diego, CA 92101-4181.

What is William Karr's phone number?

The practice phone number listed in the NPPES registry for William Karr is (619) 548-3754.

Is William Karr's NPI active?

Yes — William Karr's NPI (1861352569) is active in the NPPES registry as of the last update on 2025-11-19.

IndividualActive

William Karr

NPI 1861352569 · Independent Duty Corpsman · San Diego, CA

William Karr is a Independent Duty Corpsman provider in San Diego, CA (NPI 1861352569).

Provider details

NPI number: 1861352569
Entity type: Individual
Primary specialty: Independent Duty CorpsmanOther Service Providers
Sex: Male
Sole proprietor: No
License: K600938932940 (FL)

Specialties & taxonomies

Independent Duty CorpsmanPrimary1710I1002XLicense K600938932940 (FL)
Other Service Providers

Profile Score

Established profile(54/100 index)

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

Registry tenure38% of score
Under 1 yr in 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.

Practice location

1450 Market St Apt 359

San Diego, CA 92101-4181

Phone: (619) 548-3754

Street-level locationGet directions

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Mailing address