Erin E. Farrelly, MD, a Medical Corporation
NPI 1578975561 · Medical Specialty Clinic/Center · Santa Ana, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erin E. Farrelly, MD, a Medical Corporation is a Medical Specialty Clinic/Center organization in Santa Ana, CA (NPI 1578975561).
Provider details
- NPI number
- 1578975561
- Entity type
- Organization
- Primary specialty
- Medical Specialty Clinic/CenterAmbulatory Health Care Facilities
- Organization subpart
- No
- Authorized official
- Erin Farrelly, President(714) 542-0320
- License
- A121731 (CA)
Specialties & taxonomies
Ambulatory Health Care Facilities
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 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
- 2014-05-23
- Last updated
- 2014-05-23
Frequently asked questions
- What is Erin E. Farrelly, MD, a Medical Corporation's NPI number?
- Erin E. Farrelly, MD, a Medical Corporation's National Provider Identifier (NPI) is 1578975561, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Erin E. Farrelly, MD, a Medical Corporation?
- Erin E. Farrelly, MD, a Medical Corporation is classified in the NPPES registry as Medical Specialty Clinic/Center (Ambulatory Health Care Facilities).
- Where is Erin E. Farrelly, MD, a Medical Corporation located?
- Erin E. Farrelly, MD, a Medical Corporation's practice location on file with NPPES is 999 N Tustin Ave Ste 109, Santa Ana, CA 92705-6504.
- What is Erin E. Farrelly, MD, a Medical Corporation's phone number?
- The practice phone number listed in the NPPES registry for Erin E. Farrelly, MD, a Medical Corporation is (714) 542-0320.
- Does Erin E. Farrelly, MD, a Medical Corporation accept Medicare?
- Erin E. Farrelly, MD, a Medical Corporation is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Erin E. Farrelly, MD, a Medical Corporation?
- The authorized official listed on Erin E. Farrelly, MD, a Medical Corporation's NPPES record is Erin Farrelly, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Erin E. Farrelly, MD, a Medical Corporation's NPI active?
- Yes — Erin E. Farrelly, MD, a Medical Corporation's NPI (1578975561) is active in the NPPES registry as of the last update on 2014-05-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.