Steven Izumi, MD
NPI 1316944861 · Hospitalist Physician · Costa Mesa, CA
Steven Izumi, MD is a Hospitalist Physician provider in Costa Mesa, CA (NPI 1316944861).
Provider details
- NPI number
- 1316944861
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G47882 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-30
- Last updated
- 2008-09-17
Frequently asked questions
- What is Steven Izumi's NPI number?
- Steven Izumi's National Provider Identifier (NPI) is 1316944861, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Izumi's specialty?
- Steven Izumi is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Steven Izumi located?
- Steven Izumi's practice location on file with NPPES is 1665 Scenic Ave, Costa Mesa, CA 92626.
- What is Steven Izumi's phone number?
- The practice phone number listed in the NPPES registry for Steven Izumi is (714) 436-4444.
- Is Steven Izumi's NPI active?
- Yes — Steven Izumi's NPI (1316944861) is active in the NPPES registry as of the last update on 2008-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.