Ester Kwok, MD
NPI 1790886034 · Internal Medicine Physician · Los Gatos, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ester Kwok, MD is a Internal Medicine Physician provider in Los Gatos, CA (NPI 1790886034).
Provider details
- NPI number
- 1790886034
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A050957 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
756 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 365 | $154 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 177 | $216 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 116 | $157 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 34 | $110 |
| Administration of Pneumococcal VaccineG0009 | 25 | $39 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 50 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 317 | 116 |
| Losartan Potassium | 240 | 74 |
| Amlodipine Besylate | 231 | 88 |
| Levothyroxine Sodium | 205 | 62 |
| Atorvastatin Calcium | 182 | 65 |
| Metformin Hclbrand: Metformin Hcl Er | 92 | 33 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-26
- Last updated
- 2025-02-03
- Certified
- 2025-02-03
Frequently asked questions
- What is Ester Kwok's NPI number?
- Ester Kwok's National Provider Identifier (NPI) is 1790886034, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ester Kwok's specialty?
- Ester Kwok is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ester Kwok located?
- Ester Kwok's practice location on file with NPPES is 320 Dardanelli Ln Ste 27b, Los Gatos, CA 95032-1440.
- What is Ester Kwok's phone number?
- The practice phone number listed in the NPPES registry for Ester Kwok is (408) 374-1112.
- Does Ester Kwok accept Medicare?
- Ester Kwok is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ester Kwok's NPI active?
- Yes — Ester Kwok's NPI (1790886034) is active in the NPPES registry as of the last update on 2025-02-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.