OrganizationActive
Ranu Grewal-Bahl MD
NPI 1710936653 · Specialist · Hayward, CA
Ranu Grewal-Bahl MD is a Specialist organization in Hayward, CA (NPI 1710936653).
Provider details
- NPI number
- 1710936653
- Entity type
- Organization
- Primary specialty
- SpecialistOther Service Providers
- Organization subpart
- No
- Authorized official
- Mary Ann Derenzi, Billing Manager(510) 732-6930
- License
- A039529 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
27204 Calaroga Ave
Hayward, CA 94545-4339
Phone: (510) 732-6930
Fax: (510) 732-1357
Street-level locationGet directions
Mailing address
27204 Calaroga Ave
Hayward, CA 94545-4339
Other names (DBA / former)
- Doing business as
- Alameda Radiation Oncology
Registry dates
- Enumerated
- 2006-05-09
- Last updated
- 2013-03-27
Frequently asked questions
- What is Ranu Grewal-Bahl MD's NPI number?
- Ranu Grewal-Bahl MD's National Provider Identifier (NPI) is 1710936653, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Ranu Grewal-Bahl MD?
- Ranu Grewal-Bahl MD is classified in the NPPES registry as Specialist (Other Service Providers).
- Where is Ranu Grewal-Bahl MD located?
- Ranu Grewal-Bahl MD's practice location on file with NPPES is 27204 Calaroga Ave, Hayward, CA 94545-4339.
- What is Ranu Grewal-Bahl MD's phone number?
- The practice phone number listed in the NPPES registry for Ranu Grewal-Bahl MD is (510) 732-6930.
- Who is the authorized official for Ranu Grewal-Bahl MD?
- The authorized official listed on Ranu Grewal-Bahl MD's NPPES record is Mary Ann Derenzi, Billing Manager. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Ranu Grewal-Bahl MD's NPI active?
- Yes — Ranu Grewal-Bahl MD's NPI (1710936653) is active in the NPPES registry as of the last update on 2013-03-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.