William Lorentz, M.D.
NPI 1861657033 · Radiation Oncology Physician · Los Angeles, CA
William Lorentz, M.D. is a Radiation Oncology Physician provider in Los Angeles, CA (NPI 1861657033).
Provider details
- NPI number
- 1861657033
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A109139 (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
17 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
- 2008-07-26
- Last updated
- 2014-01-20
Frequently asked questions
- What is William Lorentz's NPI number?
- William Lorentz's National Provider Identifier (NPI) is 1861657033, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Lorentz's specialty?
- William Lorentz is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Lorentz located?
- William Lorentz's practice location on file with NPPES is 11301 Wilshire Blvd, Los Angeles, CA 90073-1003.
- What is William Lorentz's phone number?
- The practice phone number listed in the NPPES registry for William Lorentz is (310) 268-3390.
- Is William Lorentz's NPI active?
- Yes — William Lorentz's NPI (1861657033) is active in the NPPES registry as of the last update on 2014-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.