Grand Avenue Surgery Center, LLC
NPI 1558832741 · Ambulatory Surgical Clinic/Center · Los Angeles, CA
Enrolled with Medicare as Part B Supplier - Ambulatory Surgical Center · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grand Avenue Surgery Center, LLC is a Ambulatory Surgical Clinic/Center organization in Los Angeles, CA (NPI 1558832741).
Provider details
- NPI number
- 1558832741
- Entity type
- Organization
- Primary specialty
- Ambulatory Surgical Clinic/CenterAmbulatory Health Care Facilities
- Organization subpart
- No
- Authorized official
- Greg Horner, Ceo(925) 984-4734
Specialties & taxonomies
Ambulatory Health Care Facilities
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
113 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 113 | $1,359 |
Typical Medicare-allowed amounts for these services range $1,359–$1,359 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-12-16
- Last updated
- 2020-12-04
- Certified
- 2020-12-04
Frequently asked questions
- What is Grand Avenue Surgery Center, LLC's NPI number?
- Grand Avenue Surgery Center, LLC's National Provider Identifier (NPI) is 1558832741, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Grand Avenue Surgery Center, LLC?
- Grand Avenue Surgery Center, LLC is classified in the NPPES registry as Ambulatory Surgical Clinic/Center (Ambulatory Health Care Facilities).
- Where is Grand Avenue Surgery Center, LLC located?
- Grand Avenue Surgery Center, LLC's practice location on file with NPPES is 1400 S Grand Ave Ste 700, Los Angeles, CA 90015-3068.
- What is Grand Avenue Surgery Center, LLC's phone number?
- The practice phone number listed in the NPPES registry for Grand Avenue Surgery Center, LLC is (213) 866-1900.
- Does Grand Avenue Surgery Center, LLC accept Medicare?
- Grand Avenue Surgery Center, LLC 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 Grand Avenue Surgery Center, LLC?
- The authorized official listed on Grand Avenue Surgery Center, LLC's NPPES record is Greg Horner, Ceo. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Grand Avenue Surgery Center, LLC's NPI active?
- Yes — Grand Avenue Surgery Center, LLC's NPI (1558832741) is active in the NPPES registry as of the last update on 2020-12-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.