Sienna Medical Corporation
NPI 1174684583 · Internal Medicine Physician · Lake Isabella, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sienna Medical Corporation is a Internal Medicine Physician organization in Lake Isabella, CA (NPI 1174684583).
Provider details
- NPI number
- 1174684583
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Robert Gross, Owner/President(760) 379-8630
- License
- 20A7951 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
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
2 documented practice locations
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
Other names (DBA / former)
- Doing business as
- Sienna Wellness Institute
Additional practice locations (1)
- 1535 N China Lake Blvd Ste BRidgecrest, CA 93555-2667Phone: (760) 379-8630Fax: (760) 379-7658
Registry dates
- Enumerated
- 2006-12-12
- Last updated
- 2026-05-29
- Certified
- 2026-05-29
Frequently asked questions
- What is Sienna Medical Corporation's NPI number?
- Sienna Medical Corporation's National Provider Identifier (NPI) is 1174684583, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Sienna Medical Corporation?
- Sienna Medical Corporation is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sienna Medical Corporation located?
- Sienna Medical Corporation's practice location on file with NPPES is 6425 Lynch Canyon Dr, Lake Isabella, CA 93240-9726.
- What is Sienna Medical Corporation's phone number?
- The practice phone number listed in the NPPES registry for Sienna Medical Corporation is (760) 379-8630.
- Does Sienna Medical Corporation accept Medicare?
- Sienna 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 Sienna Medical Corporation?
- The authorized official listed on Sienna Medical Corporation's NPPES record is Robert Gross, Owner/President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Sienna Medical Corporation's NPI active?
- Yes — Sienna Medical Corporation's NPI (1174684583) is active in the NPPES registry as of the last update on 2026-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.