Martha S. Hynes, M.D.
Obstetrics & Gynecology Physician · Torrance, CA
Martha S. Hynes, M.D. is an obstetrics & gynecology physician with a practice address in Torrance, California, and NPI 1801800750, issued on Jul 28, 2006. Check the license (California G47713, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Martha S. Hynes
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G47713 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20911 Earl St Ste 460, Torrance, CA 90503
- Phone
- (310) 540-4060
- Enumerated
- Jul 28, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (310) 316-3761
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 20911 Earl St Ste 460
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mona Tahilramaney, M.D.Obstetrics & Gynecology Physician1639183502
Verify Martha S. Hynes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G47713Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Martha S. Hynes among 5,088 obstetrics & gynecology physician records in California
Martha S. Hynes, 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 not. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileNo · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2007 · 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. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,088 in California → Every provider in Torrance → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Jeffrey Cowan, M.D.Torrance, CA 905031982618500
- Stephanie Culver, MDTorrance, CA 905031386758399
- Lisa Fisher, M.D.Torrance, CA 905031285665810
- Denise Ishimaru, M.D.Torrance, CA 905031225219066
- Francine Ito, M.D.Torrance, CA 905031275562993
- John Lim, M.D.Torrance, CA 905031508899493
- David Lu, MDTorrance, CA 905031255515417
- Astrid Mendoza, D.OTorrance, CA 905031871536797
Common questions
What is Martha S. Hynes, M.D.'s NPI number?
Martha S. Hynes, M.D.'s National Provider Identifier (NPI) is 1801800750, issued on Jul 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Martha S. Hynes, M.D. located?
The NPPES record lists a practice address at 20911 Earl St Ste 460, Torrance, CA, 90503. Phone: (310) 540-4060. Providers update this record themselves, so call before visiting.
How can I verify Martha S. Hynes, M.D.'s license?
NPPES lists California license number G47713, 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.