Yvonne Kwan, MD
NPI 1659378966 · Internal Medicine Physician · Costa Mesa, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Yvonne Kwan, MD is a Internal Medicine Physician provider in Costa Mesa, CA (NPI 1659378966).
Provider details
- NPI number
- 1659378966
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G79797 (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
20 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
1,042 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 393 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 387 | $96 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 185 | $73 |
| Administration of Influenza Virus VaccineG0008 | 28 | $31 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 22 | $109 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 75 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 462 | 144 |
| Losartan Potassium | 461 | 149 |
| Amlodipine Besylate | 370 | 119 |
| Atorvastatin Calcium | 265 | 85 |
| Pravastatin Sodium | 240 | 71 |
| Alendronate Sodium | 224 | 77 |
| Levothyroxine Sodium | 187 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-30
- Last updated
- 2011-06-30
Frequently asked questions
- What is Yvonne Kwan's NPI number?
- Yvonne Kwan's National Provider Identifier (NPI) is 1659378966, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Yvonne Kwan's specialty?
- Yvonne Kwan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Yvonne Kwan located?
- Yvonne Kwan's practice location on file with NPPES is 1665 Scenic Ave, Costa Mesa, CA 92626-1445.
- What is Yvonne Kwan's phone number?
- The practice phone number listed in the NPPES registry for Yvonne Kwan is (714) 436-4700.
- Does Yvonne Kwan accept Medicare?
- Yvonne Kwan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Yvonne Kwan's NPI active?
- Yes — Yvonne Kwan's NPI (1659378966) is active in the NPPES registry as of the last update on 2011-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.