Cassandra Chiao
NPI 1366905077 · Internal Medicine Physician · Madison, WI
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cassandra Chiao is a Internal Medicine Physician provider in Madison, WI (NPI 1366905077).
Provider details
- NPI number
- 1366905077
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- 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
7 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
- 2019-04-09
- Last updated
- 2025-09-11
- Certified
- 2025-09-11
Frequently asked questions
- What is Cassandra Chiao's NPI number?
- Cassandra Chiao's National Provider Identifier (NPI) is 1366905077, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cassandra Chiao's specialty?
- Cassandra Chiao is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Cassandra Chiao located?
- Cassandra Chiao's practice location on file with NPPES is 600 Highland Ave, Madison, WI 53792-0001.
- What is Cassandra Chiao's phone number?
- The practice phone number listed in the NPPES registry for Cassandra Chiao is (608) 263-6400.
- Does Cassandra Chiao accept Medicare?
- Cassandra Chiao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cassandra Chiao's NPI active?
- Yes — Cassandra Chiao's NPI (1366905077) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.