Toyohisa Ishii, MD
NPI 1841379997 · Obstetrics & Gynecology Physician · Valley Center, CA
Toyohisa Ishii, MD is a Obstetrics & Gynecology Physician provider in Valley Center, CA (NPI 1841379997).
Provider details
- NPI number
- 1841379997
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G27949 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2006-11-02
- Last updated
- 2009-04-14
Frequently asked questions
- What is Toyohisa Ishii's NPI number?
- Toyohisa Ishii's National Provider Identifier (NPI) is 1841379997, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Toyohisa Ishii's specialty?
- Toyohisa Ishii is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Toyohisa Ishii located?
- Toyohisa Ishii's practice location on file with NPPES is 27007 Red Ironbark Dr, Valley Center, CA 92082-7259.
- What is Toyohisa Ishii's phone number?
- The practice phone number listed in the NPPES registry for Toyohisa Ishii is (760) 751-9143.
- Is Toyohisa Ishii's NPI active?
- Yes — Toyohisa Ishii's NPI (1841379997) is active in the NPPES registry as of the last update on 2009-04-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.