Diane Han, MD
NPI 1700465721 · Emergency Medicine Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diane Han, MD is a Emergency Medicine Physician provider in Palo Alto, CA (NPI 1700465721).
Provider details
- NPI number
- 1700465721
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2021-04-06
- Last updated
- 2025-01-02
- Certified
- 2025-01-02
Frequently asked questions
- What is Diane Han's NPI number?
- Diane Han's National Provider Identifier (NPI) is 1700465721, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Han's specialty?
- Diane Han is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Diane Han located?
- Diane Han's practice location on file with NPPES is 900 Welch Rd Ste 350, Palo Alto, CA 94304-1807.
- What is Diane Han's phone number?
- The practice phone number listed in the NPPES registry for Diane Han is (408) 981-2115.
- Does Diane Han accept Medicare?
- Diane Han is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diane Han's NPI active?
- Yes — Diane Han's NPI (1700465721) is active in the NPPES registry as of the last update on 2025-01-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.