Mark Nachman, MD
NPI 1104803683 · Internal Medicine Physician · Santa Monica, CA
Mark Nachman, MD is a Internal Medicine Physician provider in Santa Monica, CA (NPI 1104803683).
Provider details
- NPI number
- 1104803683
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G27424 (CA)
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
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
- 2005-12-27
- Last updated
- 2021-04-19
- Certified
- 2021-04-19
Frequently asked questions
- What is Mark Nachman's NPI number?
- Mark Nachman's National Provider Identifier (NPI) is 1104803683, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Nachman's specialty?
- Mark Nachman is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Nachman located?
- Mark Nachman's practice location on file with NPPES is 1301 20th St, Santa Monica, CA 90404-2053.
- What is Mark Nachman's phone number?
- The practice phone number listed in the NPPES registry for Mark Nachman is (310) 315-0111.
- Is Mark Nachman's NPI active?
- Yes — Mark Nachman's NPI (1104803683) is active in the NPPES registry as of the last update on 2021-04-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.