Mark Horng, MD
NPI 1295739043 · Internal Medicine Physician · Los Angeles, CA
Mark Horng, MD is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1295739043).
Provider details
- NPI number
- 1295739043
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 210303 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
21 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
- 2005-06-09
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Horng's NPI number?
- Mark Horng's National Provider Identifier (NPI) is 1295739043, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Horng's specialty?
- Mark Horng is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Horng located?
- Mark Horng's practice location on file with NPPES is 11301 Wilshire Blvd, Los Angeles, CA 90073-1003.
- What is Mark Horng's phone number?
- The practice phone number listed in the NPPES registry for Mark Horng is (310) 478-3711.
- Is Mark Horng's NPI active?
- Yes — Mark Horng's NPI (1295739043) 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.