Riverside Radiology Medical Group, Inc.
NPI 1851694699 · Diagnostic Radiology Physician · Mill Valley, CA
Riverside Radiology Medical Group, Inc. is a Diagnostic Radiology Physician organization in Mill Valley, CA (NPI 1851694699).
Provider details
- NPI number
- 1851694699
- Entity type
- Organization
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Donald Massee, President(951) 781-2273
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
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2010-12-17
- Last updated
- 2010-12-17
Frequently asked questions
- What is Riverside Radiology Medical Group, Inc.'s NPI number?
- Riverside Radiology Medical Group, Inc.'s National Provider Identifier (NPI) is 1851694699, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Riverside Radiology Medical Group, Inc.?
- Riverside Radiology Medical Group, Inc. is classified in the NPPES registry as Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Riverside Radiology Medical Group, Inc. located?
- Riverside Radiology Medical Group, Inc.'s practice location on file with NPPES is 338 Lowell Ave, Mill Valley, CA 94941-3845.
- What is Riverside Radiology Medical Group, Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Riverside Radiology Medical Group, Inc. is (559) 455-4041.
- Who is the authorized official for Riverside Radiology Medical Group, Inc.?
- The authorized official listed on Riverside Radiology Medical Group, Inc.'s NPPES record is Donald Massee, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Riverside Radiology Medical Group, Inc.'s NPI active?
- Yes — Riverside Radiology Medical Group, Inc.'s NPI (1851694699) is active in the NPPES registry as of the last update on 2010-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.