Observatory Surgery Center LLC.
NPI 1083944375 · Ambulatory Surgical Clinic/Center · Ukiah, CA
Observatory Surgery Center LLC. is a Ambulatory Surgical Clinic/Center organization in Ukiah, CA (NPI 1083944375).
Provider details
- NPI number
- 1083944375
- Entity type
- Organization
- Primary specialty
- Ambulatory Surgical Clinic/CenterAmbulatory Health Care Facilities
- Organization subpart
- No
- Authorized official
- Harry Matossian, MD/ Owner(707) 462-0681
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
16 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
- 2010-01-08
- Last updated
- 2010-01-08
Frequently asked questions
- What is Observatory Surgery Center LLC.'s NPI number?
- Observatory Surgery Center LLC.'s National Provider Identifier (NPI) is 1083944375, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Observatory Surgery Center LLC.?
- Observatory Surgery Center LLC. is classified in the NPPES registry as Ambulatory Surgical Clinic/Center (Ambulatory Health Care Facilities).
- Where is Observatory Surgery Center LLC. located?
- Observatory Surgery Center LLC.'s practice location on file with NPPES is 271 Observatory Ave, Ukiah, CA 95482-5757.
- What is Observatory Surgery Center LLC.'s phone number?
- The practice phone number listed in the NPPES registry for Observatory Surgery Center LLC. is (707) 462-2299.
- Who is the authorized official for Observatory Surgery Center LLC.?
- The authorized official listed on Observatory Surgery Center LLC.'s NPPES record is Harry Matossian, MD/ Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Observatory Surgery Center LLC.'s NPI active?
- Yes — Observatory Surgery Center LLC.'s NPI (1083944375) is active in the NPPES registry as of the last update on 2010-01-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.