Marc Ishizuka, D.O.
NPI 1023230844 · Psychiatry Physician · Greenville, SC
Marc Ishizuka, D.O. is a Psychiatry Physician provider in Greenville, SC (NPI 1023230844).
Provider details
- NPI number
- 1023230844
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- OT010508 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
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
- 2007-05-02
- Last updated
- 2017-03-24
Frequently asked questions
- What is Marc Ishizuka's NPI number?
- Marc Ishizuka's National Provider Identifier (NPI) is 1023230844, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Ishizuka's specialty?
- Marc Ishizuka is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Ishizuka located?
- Marc Ishizuka's practice location on file with NPPES is 41 Park Creek Dr, Greenville, SC 29605-4270.
- What is Marc Ishizuka's phone number?
- The practice phone number listed in the NPPES registry for Marc Ishizuka is (864) 299-1600.
- Is Marc Ishizuka's NPI active?
- Yes — Marc Ishizuka's NPI (1023230844) is active in the NPPES registry as of the last update on 2017-03-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.