Robert Gross, DO
Internal Medicine Physician · Lake Isabella, CA
Robert Gross, DO is an internal medicine physician with a practice address in Lake Isabella, California, and NPI 1396827358, issued on Oct 19, 2006. Check the license (California 20A7951, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Gross
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A7951 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6425 Lynch Canyon Dr, Lake Isabella, CA 93240
- Phone
- (760) 379-8630
- Enumerated
- Oct 19, 2006
- Entity
- Type 1 · individual
Also registered at 6425 Lynch Canyon Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gary Finstad, M.D.Internal Medicine Physician1184763633
- James Gutzman, PA-C, RN, FNPPhysician Assistant1295834844
- Phillip Martin, MDEmergency Medicine Physician1275580680
- Holly Spohn-Gross, DPMPodiatrist1659453611
Verify Robert Gross in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7951Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
37% more Medicare Part D claims than the average internal medicine physician in 2024
3,806 Medicare Part D claims for 135 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. 77 claims were for opioids.
Most prescribed
- Eliquis350 claims
- Atorvastatin Calcium237 claims
- Tradjenta189 claims
- Omeprazole178 claims
- Furosemide165 claims
- Gabapentin147 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
2 hospital and facility affiliations
- Kern Valley Healthcare DistrictLake Isabella, CA · Critical Access Hospitals3 of 5 stars
- Sienna Medical CorporationLake Isabella, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
2 internal medicine physician records list a Lake Isabella practice address
They are 2 of the 140 NPPES records with a Lake Isabella practice address, and 20,403 internal medicine physician records in California.
All 2 in Lake Isabella → All 20,403 in California → Every provider in Lake Isabella →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Robert Gross, DO's NPI number?
Robert Gross, DO's National Provider Identifier (NPI) is 1396827358, issued on Oct 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Gross, DO located?
The NPPES record lists a practice address at 6425 Lynch Canyon Dr, Lake Isabella, CA, 93240. Phone: (760) 379-8630. Providers update this record themselves, so call before visiting.
How can I verify Robert Gross, DO's license?
NPPES lists California license number 20A7951, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert Gross, DO prescribe under Medicare Part D?
In 2024, Robert Gross, DO had 3,806 Medicare Part D claims for 135 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.