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Niall Cullen, M.D.
NPI 1659451979 · Gynecology Physician · Santa Ana, CA
Niall Cullen, M.D. is a Gynecology Physician provider in Santa Ana, CA (NPI 1659451979).
Provider details
- NPI number
- 1659451979
- Entity type
- Individual
- Primary specialty
- Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A20257 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 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
1725 W 17th St
Building 50
Santa Ana, CA 92706-2316
Phone: (714) 834-8146
Fax: (714) 834-8361
Street-level locationGet directions
Mailing address
37 Costa Brava
Laguna Niguel, CA 92677-9347
Registry dates
- Enumerated
- 2006-10-17
- Last updated
- 2015-05-04
Frequently asked questions
- What is Niall Cullen's NPI number?
- Niall Cullen's National Provider Identifier (NPI) is 1659451979, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Niall Cullen's specialty?
- Niall Cullen is listed in the NPPES registry with a primary specialty of Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Niall Cullen located?
- Niall Cullen's practice location on file with NPPES is 1725 W 17th St, Santa Ana, CA 92706-2316.
- What is Niall Cullen's phone number?
- The practice phone number listed in the NPPES registry for Niall Cullen is (714) 834-8146.
- Is Niall Cullen's NPI active?
- Yes — Niall Cullen's NPI (1659451979) is active in the NPPES registry as of the last update on 2015-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.