Quick answers
- Does Keith M. Gross accept Medicare assignment?
- Yes. Medicare's clinician data says Keith M. Gross accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Keith M. Gross see?
- In 2024, CMS data shows 3,108 Original Medicare patients and 24,278 services for Keith M. Gross. This counts Original Medicare only and measures volume, not quality.
- What is Keith M. Gross's NPI number?
- 1952357188. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Keith M. Gross, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 3,108 |
|---|---|
| Services billed to Medicare | 24,278 |
| Different services or procedures | 86 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)7,659 services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)6,900 services
- Destruction of precancer skin growth, 1 growth (17000)1,778 services
- Biopsy of related skin growth, first growth (11102)1,271 services
- Biopsy of related skin growth, each additional growth (11103)911 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis43%
- Diabetes29%
- Ischemic heart disease27%
- Chronic kidney disease25%
Practice locations
Addresses where Keith M. Gross is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 14; the Medicare profile lists all.
- 1113 Alta Ave, Suite 200Upland, CA 91786 (909) 985‑1948
- 11274 S Fortuna Rd, Suite D4Yuma, AZ 85367 (928) 342‑3376
- 12550 Hesperia Rd, Suite 218Victorville, CA 92395 (760) 951‑9895
- 130 E Haskell StWinnemucca, NV 89445 (775) 753‑9799
- 1810 1st StSusanville, CA 96130 (530) 257‑7335
Group practices
Medicare enrollment lists Keith M. Gross as a member of this group (CMS data updated October 2, 2026).
- Keith Mark Gross MD Inc4 clinicians in the group
Specialties
Other dermatologists in Upland
Clinicians with the same Medicare primary specialty in Upland, CA — not a recommendation.
Other clinicians in Keith Mark Gross MD Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 1987 (39 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952357188 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians