Sun-Joo Jang, MD, PHD
NPI 1659900595 · Internal Medicine Physician · New Haven, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sun-Joo Jang, MD, PHD is a Internal Medicine Physician provider in New Haven, CT (NPI 1659900595).
Provider details
- NPI number
- 1659900595
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- 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 tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$140 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 267 Grant StBridgeport, CT 06610-2805Phone: (781) 888-5542
Registry dates
- Enumerated
- 2020-04-03
- Last updated
- 2023-09-28
- Certified
- 2023-09-28
Frequently asked questions
- What is Sun-Joo Jang's NPI number?
- Sun-Joo Jang's National Provider Identifier (NPI) is 1659900595, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sun-Joo Jang's specialty?
- Sun-Joo Jang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sun-Joo Jang located?
- Sun-Joo Jang's practice location on file with NPPES is 20 York St, New Haven, CT 06510-3220.
- What is Sun-Joo Jang's phone number?
- The practice phone number listed in the NPPES registry for Sun-Joo Jang is (781) 888-5542.
- Does Sun-Joo Jang accept Medicare?
- Sun-Joo Jang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sun-Joo Jang's NPI active?
- Yes — Sun-Joo Jang's NPI (1659900595) is active in the NPPES registry as of the last update on 2023-09-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.