Mark R. Rockoff, M.D.
Diagnostic Radiology Physician · Tarzana, CA
Mark R. Rockoff, M.D. is a diagnostic radiology physician with a practice address in Tarzana, California, and NPI 1679513857, issued on Jun 7, 2006. Check the license (California G37042, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark R. Rockoff
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- G37042 CA
Self-reported in NPPES; status is on the state search - Practice location
- 18344 Clark Street, Tarzana, CA 91356
- Phone
- (818) 881-9811
- Enumerated
- Jun 7, 2006
- Record last updated
- Nov 27, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (818) 881-1638
- Medicaid ID
- 00G370420 CA
- Medicare enrollment
- Enrolled (PECOS I20050707001015); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1977
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 18344 Clark Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jack Chen, M.D.Diagnostic Radiology Physician1134169139
- Lawrence Chespak, M.D.Diagnostic Radiology Physician1437198058
- Leroy Clark, M.D.Diagnostic Radiology Physician1982643508
- Jerald Einziger, M.D.Diagnostic Radiology Physician1861448268
- Richard Gritz, M.D.Diagnostic Radiology Physician1548200637
- Maged Mikhail, M.D.Vascular Surgery Physician1316978299
Verify Mark R. Rockoff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G37042Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- United Medical Imaging Healthcare IncSeal Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark R. Rockoff among 4,500 diagnostic radiology physician records in California
Mark R. Rockoff, M.D. is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1977 · median 2004 among the 3,130 with a school on file
- Record last updated2007 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in California
There are 4,500 diagnostic radiology physician records in California.
All 4,500 in California → Every provider in Tarzana → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Jack Chen, M.D.Tarzana, CA 913561134169139
- Lawrence Chespak, M.D.Tarzana, CA 913561437198058
- Leroy Clark, M.D.Tarzana, CA 913561982643508
- Jerald Einziger, M.D.Tarzana, CA 913561861448268
- Richard Gritz, M.D.Tarzana, CA 913561548200637
- David Rubenstein, M.D.Tarzana, CA 913561235179219
- Rolf Arndt, MDValencia, CA 913551508811803
- Joshua Hanelin, M.D.Valencia, CA 913551194928770
Common questions
What is Mark R. Rockoff, M.D.'s NPI number?
Mark R. Rockoff, M.D.'s National Provider Identifier (NPI) is 1679513857, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark R. Rockoff, M.D. located?
The NPPES record lists a practice address at 18344 Clark Street, Tarzana, CA, 91356. Phone: (818) 881-9811. Providers update this record themselves, so call before visiting.
How can I verify Mark R. Rockoff, M.D.'s license?
NPPES lists California license number G37042, 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. Medicare files from data.cms.gov. 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.