SIENNA MEDICAL CORPORATION
NPI 1174684583
Internal Medicine in Lake Isabella, CA

Q: What is Sienna Medical Corporation's NPI number?

The NPI number for Sienna Medical Corporation is 1174684583. It was assigned to this organization in the NPPES registry on December 12, 2006. The provider is doing business as Sienna Wellness Institute.

Q: What is Sienna Medical Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since December 12, 2006

6425 LYNCH CANYON DR, LAKE ISABELLA, CA 93240(760) 379-8630(760) 379-7658 Get Directions Write a Review

NPPES record last updated: May 29, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 29, 2026, May 22, 2026 (2 updates tracked since 2026).

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About Sienna Medical Corporation NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SIENNA MEDICAL CORPORATION (NPI 1174684583), doing business as Sienna Wellness Institute, is a healthcare organization registered as an internal medicine in Lake Isabella, California and active in the NPI registry since December 2006. The organization maintains a secondary practice location in Ridgecrest and lists Robert Gross, Owner/president, as its authorized official.

NPPES Registry Identity

NPI1174684583

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameSIENNA MEDICAL CORPORATION

Location Address6425 LYNCH CANYON DRLake Isabella, CA 93240-9726

Mailing Address6425 Lynch Canyon DrLake Isabella, CA 93240-9726 · (760) 379-8630 · Fax (760) 379-7658

Phone(760) 379-8630

Fax(760) 379-7658

Organization SubpartNo

Authorized OfficialRobert GrossOwner/president · (760) 379-8630

Enumeration DateDecember 12, 2006

Last NPPES UpdateMay 29, 20262 updates tracked since enumeration

NPPES CertifiedMay 29, 2026

✔ NPI 1174684583 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · 20A7951

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

6425 LYNCH CANYON DR, Lake Isabella, CA 93240

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Other Names 1

Doing Business AsSienna Wellness Institute

Secondary Practice Location 1

Location 11535 N China Lake Blvd Ste BRidgecrest, CA 93555-2667 · Phone (760) 379-8630 ext. 27 · Fax (760) 379-7658

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GARY ARLYN FINSTAD M.D.

Internal Medicine

6425 LYNCH CANYON DR
LAKE ISABELLA, CA 93240

Kern County (760) 379-8630

PHILLIP ALLAN MARTIN MD

Internal Medicine

6425 LYNCH CANYON DR
LAKE ISABELLA, CA 93240

Kern County (760) 379-8630

MR. JAMES DARRYL GUTZMAN PA-C, RN, FNP

Physician Assistant

6425 LYNCH CANYON DR
LAKE ISABELLA, CA 93240

Kern County (760) 379-8630

SIENNA WELLNES WALK-IN CLINIC

Clinic/Center (Primary Care)

6425 LYNCH CANYON DR
LAKE ISABELLA, CA 93240

Kern County (760) 379-8630

SIENNA HOSPITALIST GROUP INCORPORATED

Hospitalist

6425 LYNCH CANYON DR
LAKE ISABELLA, CA 93240

Kern County (760) 379-8630

MRS. MIRANDA ESTELLE EVERETT PA-C

Physician Assistant

6425 LYNCH CANYON DR
MOUNTAIN MESA, CA 93240

Kern County (760) 379-8630

DR. ROBERT GROSS DO

Internal Medicine

6425 LYNCH CANYON DR
LAKE ISABELLA, CA 93240

Kern County (760) 379-8630

HOLLY SPOHN-GROSS DPM

Podiatrist

6425 LYNCH CANYON DR
LAKE ISABELLA, CA 93240

Kern County (760) 379-8630

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sienna Medical Corporation's NPI number?

The NPI number for Sienna Medical Corporation is 1174684583. It was assigned to this organization in the NPPES registry on December 12, 2006. The provider is doing business as Sienna Wellness Institute.

Where is Sienna Medical Corporation located?

Sienna Medical Corporation is located at 6425 Lynch Canyon Dr, Lake Isabella, CA 93240. The listed phone number is (760) 379-8630.

What is Sienna Medical Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Sienna Medical Corporation was last updated on May 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.