Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mary Louise Stepan Kiernan, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1104289065

Mary Louise Stepan Kiernan, MD practises Obstetrics/Gynecology in Long Beach, California. Graduated from New York Medical College in 2016, 10 years ago. Practices with Memorialcare Medical Foundation, a 562-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
10
Trained at
New York Medical College
Licensed in
CA
In the registry since
2016
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3711 Long Beach Blvd Ste 700
Long Beach, CA 90807-3353
Phone: (562) 424-8422
Fax: (562) 424-8770
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence A170051 (CA)

Record details

NPI number1104289065
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 29, 2016
Last updated in NPPESMarch 4, 2022
Certification dateMarch 4, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 2016 (10 years in practice)
Group practice Memorialcare Medical Foundation — 562 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients23
Services billed 45 a service is one billed item, such as a visit, a test or a procedure
Average patient age68

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $752 24 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Memorialcare Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 562 clinicians in the practice; 12 are shown here.

Other providers in Long Beach