Po-Shen Chang, M.D.
NPI 1609889062 · Family Medicine Physician · Longview, WA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Po-Shen Chang, M.D. is a Family Medicine Physician provider in Longview, WA (NPI 1609889062).
Provider details
- NPI number
- 1609889062
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00034489 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 141 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 775 | 241 |
| Lisinopril | 502 | 154 |
| Losartan Potassium | 455 | 140 |
| Amlodipine Besylate | 407 | 119 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 347 | 59 |
| Simvastatin | 346 | 96 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-15
- Last updated
- 2022-02-04
Frequently asked questions
- What is Po-Shen Chang's NPI number?
- Po-Shen Chang's National Provider Identifier (NPI) is 1609889062, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Po-Shen Chang's specialty?
- Po-Shen Chang is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Po-Shen Chang located?
- Po-Shen Chang's practice location on file with NPPES is 1230 7th Ave, Longview, WA 98632-3166.
- What is Po-Shen Chang's phone number?
- The practice phone number listed in the NPPES registry for Po-Shen Chang is (360) 636-2400.
- Does Po-Shen Chang accept Medicare?
- Po-Shen Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Po-Shen Chang's NPI active?
- Yes — Po-Shen Chang's NPI (1609889062) is active in the NPPES registry as of the last update on 2022-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.