Yu-Wen Chang, DO
NPI 1598258154 · Family Medicine Physician · Menlo Park, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Yu-Wen Chang, DO is a Family Medicine Physician provider in Menlo Park, CA (NPI 1598258154).
Provider details
- NPI number
- 1598258154
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A17804 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
977 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 | 335 | $19 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 279 | $153 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 93 | $214 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 83 | $153 |
| Administration of Influenza Virus VaccineG0008 | 44 | $38 |
| Admn Sarscov2 Vacc 1 Dose |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 147 | 47 |
| Amlodipine Besylate | 109 | 35 |
| Levothyroxine Sodium | 71 | 23 |
| Rosuvastatin Calcium | 57 | 29 |
| Losartan Potassium | 55 | 22 |
| Tamsulosin Hcl | 36 | 13 |
| Montelukast Sodium |
Practice location
Mailing address
Additional practice locations (2)
- 500 W Hospital RdFrench Camp, CA 95231-9693Phone: (209) 468-6937Fax: (209) 468-7042
- 1300 Crane StMenlo Park, CA 94025-4260Phone: (650) 498-6500
Registry dates
- Enumerated
- 2018-06-08
- Last updated
- 2024-04-17
- Certified
- 2024-04-17
Frequently asked questions
- What is Yu-Wen Chang's NPI number?
- Yu-Wen Chang's National Provider Identifier (NPI) is 1598258154, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Yu-Wen Chang's specialty?
- Yu-Wen Chang is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Yu-Wen Chang located?
- Yu-Wen Chang's practice location on file with NPPES is 321 Middlefield Rd Ste 260, Menlo Park, CA 94025-4010.
- What is Yu-Wen Chang's phone number?
- The practice phone number listed in the NPPES registry for Yu-Wen Chang is (650) 498-3522.
- Does Yu-Wen Chang accept Medicare?
- Yu-Wen Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Yu-Wen Chang's NPI active?
- Yes — Yu-Wen Chang's NPI (1598258154) is active in the NPPES registry as of the last update on 2024-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.