Guillermo Chang, MD
NPI 1730140831 · Obstetrics & Gynecology Physician · Saint Paul, MN
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guillermo Chang, MD is a Obstetrics & Gynecology Physician provider in Saint Paul, MN (NPI 1730140831).
Provider details
- NPI number
- 1730140831
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 37319 (MN)
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
20 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-29
- Last updated
- 2011-10-19
Frequently asked questions
- What is Guillermo Chang's NPI number?
- Guillermo Chang's National Provider Identifier (NPI) is 1730140831, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guillermo Chang's specialty?
- Guillermo Chang is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Guillermo Chang located?
- Guillermo Chang's practice location on file with NPPES is 347 Smith Ave N, Saint Paul, MN 55102-2387.
- What is Guillermo Chang's phone number?
- The practice phone number listed in the NPPES registry for Guillermo Chang is (651) 241-7733.
- Does Guillermo Chang accept Medicare?
- Guillermo Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guillermo Chang's NPI active?
- Yes — Guillermo Chang's NPI (1730140831) is active in the NPPES registry as of the last update on 2011-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.