Marc J. Rosenthal, M.D.
Obstetrics & Gynecology Physician · Torrance, CA
Marc J. Rosenthal, M.D. is an obstetrics & gynecology physician with a practice address in Torrance, California, and NPI 1659469575, issued on Oct 10, 2006. Check the license (California G56856, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marc J. Rosenthal
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G56856 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3440 Lomita Blvd, Torrance, CA 90505
- Phone
- (310) 325-8864
- Enumerated
- Oct 10, 2006
- Record last updated
- Jan 9, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (310) 325-1493
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 3440 Lomita Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melika AminiPharmacist1285089516
- Jody Aronson, M.D.Obstetrics & Gynecology Physician1205924180
- Naomi Arroyo, FNP, MSNFamily Nurse Practitioner1932424462
- Sharda Bhasin, M.D.Obstetrics & Gynecology Physician1871517763
- Tim Cha, MDNeurology Physician1538267901
- Jing Wen Chao, CPNP, MSNPediatric Nurse Practitioner1780869248
Verify Marc J. Rosenthal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G56856Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
84 Medicare Part D claims for 25 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Estradiol14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Marc J. Rosenthal among 5,088 obstetrics & gynecology physician records in California
Marc J. Rosenthal, M.D. is one of 5,088 obstetrics & gynecology 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 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2015 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Torrance → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Latrice Allen, M.D.Torrance, CA 905051639118359
- Jody Aronson, M.D.Torrance, CA 905051205924180
- Sharda Bhasin, M.D.Torrance, CA 905051871517763
- Alexandra Bujor, M.D.Torrance, CA 905051316955206
- Albert Chen, M.D.Torrance, CA 905051528079076
- Kay Elledge, MDTorrance, CA 905051023055928
- Karen Filkins, M.D.Torrance, CA 905051659322469
- Kenneth Holliman, M.D.Torrance, CA 905051861445645
Common questions
What is Marc J. Rosenthal, M.D.'s NPI number?
Marc J. Rosenthal, M.D.'s National Provider Identifier (NPI) is 1659469575, issued on Oct 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marc J. Rosenthal, M.D. located?
The NPPES record lists a practice address at 3440 Lomita Blvd, Torrance, CA, 90505. Phone: (310) 325-8864. Providers update this record themselves, so call before visiting.
How can I verify Marc J. Rosenthal, M.D.'s license?
NPPES lists California license number G56856, 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.
How much does Marc J. Rosenthal, M.D. prescribe under Medicare Part D?
In 2024, Marc J. Rosenthal, M.D. had 84 Medicare Part D claims for 25 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
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.