Ruchi Sareen, M.D.
NPI 1891939203 · Internal Medicine Physician · Downey, CA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ruchi Sareen, M.D. is a Internal Medicine Physician provider in Downey, CA (NPI 1891939203).
Provider details
- NPI number
- 1891939203
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A93912 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 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)
- 11 Technology DrIrvine, CA 92618-2302Phone: (949) 923-3200
Registry dates
- Enumerated
- 2009-04-29
- Last updated
- 2026-01-19
- Certified
- 2026-01-19
Frequently asked questions
- What is Ruchi Sareen's NPI number?
- Ruchi Sareen's National Provider Identifier (NPI) is 1891939203, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruchi Sareen's specialty?
- Ruchi Sareen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ruchi Sareen located?
- Ruchi Sareen's practice location on file with NPPES is 10441 Lakewood Blvd Ste Ab, Downey, CA 90241-2744.
- What is Ruchi Sareen's phone number?
- The practice phone number listed in the NPPES registry for Ruchi Sareen is (562) 869-1070.
- Does Ruchi Sareen accept Medicare?
- Ruchi Sareen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ruchi Sareen's NPI active?
- Yes — Ruchi Sareen's NPI (1891939203) is active in the NPPES registry as of the last update on 2026-01-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.