Katrin Elizabeth Massoudian, M.D.
Obstetrics & Gynecology Physician · Gardena, CA
Katrin Elizabeth Massoudian, M.D. is an obstetrics & gynecology physician with a practice address in Gardena, California, and NPI 1295734622, issued on Jul 18, 2005. Check the license (California A94251, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katrin Elizabeth Massoudian
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- A94251 CA
MD13496 HI
0101238474 VA
Self-reported in NPPES; status is on the state search - Practice location
- 18600 S Figueroa St, Gardena, CA 90248
- Phone
- (310) 516-2459
- Enumerated
- Jul 18, 2005
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20070406000170); accepts Medicare assignment
- Medical or professional school
- Virginia Commonwealth University, School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 18600 S Figueroa St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Wendy HoPreventive Medicine/Occupational Environmental Medicine Physician1396034450
- Juliet Hwang, MDPediatrics Physician1700066693
Verify Katrin Elizabeth Massoudian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A94251Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
139 Medicare Part D claims for 47 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of claims.
Most prescribed
- Estradiol30 claims
- Climara25 claims
- Progesterone23 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupHarbor City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katrin Elizabeth Massoudian among 5,088 obstetrics & gynecology physician records in California
Katrin Elizabeth Massoudian, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2001 · median 2004 among the 2,700 with a school on file
- Record last updated2021 · 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 Gardena → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Gwen Allen, M.D.Gardena, CA 902471306942909
- Danny Dan, M.D.Hawthorne, CA 902501588808943
- Jiakai Ji, MDHawthorne, CA 902501326610148
- Farshid Moossazadeh, M.D.Hawthorne, CA 902501134291032
- Parkash Sehdeva, M.D.Hawthorne, CA 902501548293145
- Savannah Kimball, MDEl Segundo, CA 902451134625866
- Alexander Mejia, M.D.El Segundo, CA 902451790910651
- Aviv Tarrab Herzlich, MDEl Segundo, CA 902451588040794
Common questions
What is Katrin Elizabeth Massoudian, M.D.'s NPI number?
Katrin Elizabeth Massoudian, M.D.'s National Provider Identifier (NPI) is 1295734622, issued on Jul 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Katrin Elizabeth Massoudian, M.D. located?
The NPPES record lists a practice address at 18600 S Figueroa St, Gardena, CA, 90248. Phone: (310) 516-2459. Providers update this record themselves, so call before visiting.
How can I verify Katrin Elizabeth Massoudian, M.D.'s license?
NPPES lists California license number A94251, 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 Katrin Elizabeth Massoudian, M.D. prescribe under Medicare Part D?
In 2024, Katrin Elizabeth Massoudian, M.D. had 139 Medicare Part D claims for 47 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.