John Alexander
NPI 1598977647 · Case Manager/Care Coordinator · Tustin, CA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Alexander is a Case Manager/Care Coordinator provider in Tustin, CA (NPI 1598977647).
Provider details
- NPI number
- 1598977647
- Entity type
- Individual
- Primary specialty
- Case Manager/Care CoordinatorOther Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- 74900 (CA)
Specialties & taxonomies
Other Service Providers
Behavioral Health & Social Service Providers
Profile Score
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
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
Mailing address
Registry dates
- Enumerated
- 2007-05-03
- Last updated
- 2024-05-13
- Certified
- 2024-05-13
Frequently asked questions
- What is John Alexander's NPI number?
- John Alexander's National Provider Identifier (NPI) is 1598977647, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Alexander's specialty?
- John Alexander is listed in the NPPES registry with a primary specialty of Case Manager/Care Coordinator (Other Service Providers).
- Where is John Alexander located?
- John Alexander's practice location on file with NPPES is 17542 17th St, Tustin, CA 92780-1959.
- What is John Alexander's phone number?
- The practice phone number listed in the NPPES registry for John Alexander is (949) 214-9822.
- Does John Alexander accept Medicare?
- John Alexander is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Alexander's NPI active?
- Yes — John Alexander's NPI (1598977647) is active in the NPPES registry as of the last update on 2024-05-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.