William Harless, M.D.
NPI 1366452823 · Internal Medicine Physician · San Diego, CA
William Harless, M.D. is a Internal Medicine Physician provider in San Diego, CA (NPI 1366452823).
Provider details
- NPI number
- 1366452823
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G27839 (CA)
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
- 2006-08-08
- Last updated
- 2013-06-19
Frequently asked questions
- What is William Harless's NPI number?
- William Harless's National Provider Identifier (NPI) is 1366452823, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Harless's specialty?
- William Harless is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Harless located?
- William Harless's practice location on file with NPPES is 300 Fir St, San Diego, CA 92101-2327.
- What is William Harless's phone number?
- The practice phone number listed in the NPPES registry for William Harless is (858) 499-2600.
- Is William Harless's NPI active?
- Yes — William Harless's NPI (1366452823) is active in the NPPES registry as of the last update on 2013-06-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.