Richard Lessman, M.D.
NPI 1073513263 · Nephrology Physician · Thousand Oaks, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Richard Lessman, M.D. is a Nephrology Physician provider in Thousand Oaks, CA (NPI 1073513263).
Provider details
- NPI number
- 1073513263
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A23840 (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
20 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
- 2005-07-28
- Last updated
- 2015-02-04
Frequently asked questions
- What is Richard Lessman's NPI number?
- Richard Lessman's National Provider Identifier (NPI) is 1073513263, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Richard Lessman's specialty?
- Richard Lessman is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Richard Lessman located?
- Richard Lessman's practice location on file with NPPES is 227 W Janss Rd, Thousand Oaks, CA 91360-1848.
- What is Richard Lessman's phone number?
- The practice phone number listed in the NPPES registry for Richard Lessman is (805) 496-6051.
- Does Richard Lessman accept Medicare?
- Richard Lessman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Richard Lessman's NPI active?
- Yes — Richard Lessman's NPI (1073513263) is active in the NPPES registry as of the last update on 2015-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.