Ruben Sierra, MD
NPI 1598868911 · Hematology & Oncology Physician · Kennewick, WA
Ruben Sierra, MD is a Hematology & Oncology Physician provider in Kennewick, WA (NPI 1598868911).
Provider details
- NPI number
- 1598868911
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD00024391 (WA)
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
19 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
- 2006-09-07
- Last updated
- 2007-07-08
Frequently asked questions
- What is Ruben Sierra's NPI number?
- Ruben Sierra's National Provider Identifier (NPI) is 1598868911, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruben Sierra's specialty?
- Ruben Sierra is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Ruben Sierra located?
- Ruben Sierra's practice location on file with NPPES is 7350 W Deschutes Ave, Kennewick, WA 99336.
- What is Ruben Sierra's phone number?
- The practice phone number listed in the NPPES registry for Ruben Sierra is (509) 783-0144.
- Is Ruben Sierra's NPI active?
- Yes — Ruben Sierra's NPI (1598868911) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.