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Harold Maizel, M.D.
NPI 1548281108 · Gastroenterology Physician · Orange, CA
Harold Maizel, M.D. is a Gastroenterology Physician provider in Orange, CA (NPI 1548281108).
Provider details
- NPI number
- 1548281108
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G8370 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
1310 W Stewart Dr
Suite #407
Orange, CA 92868-3854
Phone: (714) 288-8987
Fax: (714) 538-6672
Street-level locationGet directions
Mailing address
1310 W Stewart Dr
Orange, CA 92868-3854
Registry dates
- Enumerated
- 2006-07-21
- Last updated
- 2026-05-17
Frequently asked questions
- What is Harold Maizel's NPI number?
- Harold Maizel's National Provider Identifier (NPI) is 1548281108, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Maizel's specialty?
- Harold Maizel is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Harold Maizel located?
- Harold Maizel's practice location on file with NPPES is 1310 W Stewart Dr, Orange, CA 92868-3854.
- What is Harold Maizel's phone number?
- The practice phone number listed in the NPPES registry for Harold Maizel is (714) 288-8987.
- Is Harold Maizel's NPI active?
- Yes — Harold Maizel's NPI (1548281108) is active in the NPPES registry as of the last update on 2026-05-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.