Mark Nachman, MD
Internal Medicine Physician · Santa Monica, CA
Mark Nachman, MD is an internal medicine physician with a practice address in Santa Monica, California, and NPI 1104803683, issued on Dec 27, 2005. Check the license (California G27424, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Nachman
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G27424 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1301 20TH St, Santa Monica, CA 90404
- Phone
- (310) 315-0111
- Enumerated
- Dec 27, 2005
- Record last updated
- Apr 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (310) 315-0110
- Entity
- Type 1 · individual
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Verify Mark Nachman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G27424Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Nachman among 17,696 internal medicine physician records in California
Mark Nachman, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
168 internal medicine physician records list a practice address in Santa Monica
They are 168 of the 5,151 NPPES records with a practice address in Santa Monica, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in Santa Monica → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Robert Ashley, MDSanta Monica, CA 904041780628487
- Mitchell Becker, M.D.Santa Monica, CA 904041922033935
- Chiquita Flowers, M.D.Santa Monica, CA 904041972595700
- Glenn Gorlitsky, M.D.Santa Monica, CA 904041881625143
- Oscar Hernandez, M.D.Santa Monica, CA 904041699706952
- Mark McGowan, MDSanta Monica, CA 904041720015902
- Alex Messina, MDSanta Monica, CA 904041902867823
- Neal Shanblatt, M.D.Santa Monica, CA 904041922092410
Common questions
What is Mark Nachman, MD's NPI number?
Mark Nachman, MD's National Provider Identifier (NPI) is 1104803683, issued on Dec 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Nachman, MD located?
The NPPES record lists a practice address at 1301 20TH St, Santa Monica, CA, 90404. Phone: (310) 315-0111. Providers update this record themselves, so call before visiting.
How can I verify Mark Nachman, MD's license?
NPPES lists California license number G27424, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.