Karen Zhou, MD
NPI 1649358391 · Internal Medicine Physician · Sacramento, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Zhou, MD is a Internal Medicine Physician provider in Sacramento, CA (NPI 1649358391).
Provider details
- NPI number
- 1649358391
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A62464 (CA)
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
- 2006-11-01
- Last updated
- 2021-12-20
Frequently asked questions
- What is Karen Zhou's NPI number?
- Karen Zhou's National Provider Identifier (NPI) is 1649358391, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Zhou's specialty?
- Karen Zhou is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Zhou located?
- Karen Zhou's practice location on file with NPPES is 6600 Bruceville Rd, Sacramento, CA 95823-4671.
- What is Karen Zhou's phone number?
- The practice phone number listed in the NPPES registry for Karen Zhou is (916) 688-2000.
- Does Karen Zhou accept Medicare?
- Karen Zhou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Zhou's NPI active?
- Yes — Karen Zhou's NPI (1649358391) is active in the NPPES registry as of the last update on 2021-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.