Andy Yen, MD
NPI 1043879133 · Internal Medicine Physician · Marysville, WA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andy Yen, MD is a Internal Medicine Physician provider in Marysville, WA (NPI 1043879133).
Provider details
- NPI number
- 1043879133
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- 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 tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
740 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 141 | $90 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 116 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 58 | $10 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 57 | $124 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 53 | $13 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 47 | $16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 115 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 389 | 149 |
| Losartan Potassium | 296 | 106 |
| Amlodipine Besylate | 269 | 94 |
| Levothyroxine Sodium | 246 | 80 |
| Lisinopril | 219 | 85 |
| Metoprolol Succinate | 154 | 58 |
| Omeprazole |
Practice location
Mailing address
Additional practice locations (2)
- 120 Main StDanbury, CT 06810-7834Phone: (203) 743-0100
- 130 Derby AveDerby, CT 06418-2010Phone: (203) 735-7421
Registry dates
- Enumerated
- 2019-06-11
- Last updated
- 2024-05-08
- Certified
- 2024-05-08
Frequently asked questions
- What is Andy Yen's NPI number?
- Andy Yen's National Provider Identifier (NPI) is 1043879133, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andy Yen's specialty?
- Andy Yen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Andy Yen located?
- Andy Yen's practice location on file with NPPES is 8923 Soper Hill Rd, Marysville, WA 98270-6882.
- What is Andy Yen's phone number?
- The practice phone number listed in the NPPES registry for Andy Yen is (425) 259-0966.
- Does Andy Yen accept Medicare?
- Andy Yen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andy Yen's NPI active?
- Yes — Andy Yen's NPI (1043879133) is active in the NPPES registry as of the last update on 2024-05-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.