Tony Hsiao, MD
NPI 1952517971 · Internal Medicine Physician · Annandale, VA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tony Hsiao, MD is a Internal Medicine Physician provider in Annandale, VA (NPI 1952517971).
Provider details
- NPI number
- 1952517971
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 0101051072 (VA)
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-15
- Last updated
- 2007-07-08
Frequently asked questions
- What is Tony Hsiao's NPI number?
- Tony Hsiao's National Provider Identifier (NPI) is 1952517971, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tony Hsiao's specialty?
- Tony Hsiao is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tony Hsiao located?
- Tony Hsiao's practice location on file with NPPES is 7507 Little River Turnpike, Annandale, VA 22003.
- What is Tony Hsiao's phone number?
- The practice phone number listed in the NPPES registry for Tony Hsiao is (703) 256-1335.
- Does Tony Hsiao accept Medicare?
- Tony Hsiao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tony Hsiao's NPI active?
- Yes — Tony Hsiao's NPI (1952517971) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.