Grass Valley Radiation Oncology
NPI 1649895194 · Radiation Oncology Physician · Grass Valley, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grass Valley Radiation Oncology is a Radiation Oncology Physician organization in Grass Valley, CA (NPI 1649895194).
Provider details
- NPI number
- 1649895194
- Entity type
- Organization
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Clayton Hess, Owner(678) 733-5626
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
6 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
Additional practice locations (1)
- 155 Glasson Way Bldg 3l-20Grass Valley, CA 95945-5723Phone: (407) 788-1906Fax: (407) 682-4844
Registry dates
- Enumerated
- 2020-06-10
- Last updated
- 2026-04-29
- Certified
- 2026-04-29
Frequently asked questions
- What is Grass Valley Radiation Oncology's NPI number?
- Grass Valley Radiation Oncology's National Provider Identifier (NPI) is 1649895194, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Grass Valley Radiation Oncology?
- Grass Valley Radiation Oncology is classified in the NPPES registry as Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Grass Valley Radiation Oncology located?
- Grass Valley Radiation Oncology's practice location on file with NPPES is 300 Sierra College Dr Ste 150, Grass Valley, CA 95945-5083.
- What is Grass Valley Radiation Oncology's phone number?
- The practice phone number listed in the NPPES registry for Grass Valley Radiation Oncology is (530) 802-6400.
- Does Grass Valley Radiation Oncology accept Medicare?
- Grass Valley Radiation Oncology 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 Grass Valley Radiation Oncology?
- The authorized official listed on Grass Valley Radiation Oncology's NPPES record is Clayton Hess, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Grass Valley Radiation Oncology's NPI active?
- Yes — Grass Valley Radiation Oncology's NPI (1649895194) is active in the NPPES registry as of the last update on 2026-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.