Ka Ying Chui, NP
NPI 1659007060 · Family Nurse Practitioner · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ka Ying Chui, NP is a Family Nurse Practitioner provider in Walnut Creek, CA (NPI 1659007060).
Provider details
- NPI number
- 1659007060
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 95021880 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
3 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
442 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 199 | $74 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 183 | $163 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 60 | $112 |
Typical Medicare-allowed amounts for these services range $74–$163 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-07-27
- Last updated
- 2023-03-13
- Certified
- 2023-03-13
Frequently asked questions
- What is Ka Ying Chui's NPI number?
- Ka Ying Chui's National Provider Identifier (NPI) is 1659007060, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ka Ying Chui's specialty?
- Ka Ying Chui is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ka Ying Chui located?
- Ka Ying Chui's practice location on file with NPPES is 1450 Treat Blvd # 120, Walnut Creek, CA 94597-2168.
- What is Ka Ying Chui's phone number?
- The practice phone number listed in the NPPES registry for Ka Ying Chui is (925) 296-9720.
- Does Ka Ying Chui accept Medicare?
- Ka Ying Chui is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ka Ying Chui's NPI active?
- Yes — Ka Ying Chui's NPI (1659007060) is active in the NPPES registry as of the last update on 2023-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.