William Hwang, MD, PHD
NPI 1073994489 · Radiation Oncology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Hwang, MD, PHD is a Radiation Oncology Physician provider in Boston, MA (NPI 1073994489).
Provider details
- NPI number
- 1073994489
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 274104 (MA)
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
11 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
- 2015-06-11
- Last updated
- 2020-06-04
- Certified
- 2020-06-04
Frequently asked questions
- What is William Hwang's NPI number?
- William Hwang's National Provider Identifier (NPI) is 1073994489, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Hwang's specialty?
- William Hwang is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Hwang located?
- William Hwang's practice location on file with NPPES is Massachusetts General Hospital, Boston, MA 02114.
- What is William Hwang's phone number?
- The practice phone number listed in the NPPES registry for William Hwang is (617) 726-5820.
- Does William Hwang accept Medicare?
- William Hwang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Hwang's NPI active?
- Yes — William Hwang's NPI (1073994489) is active in the NPPES registry as of the last update on 2020-06-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.