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

Gretel Dayna D'Souza, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1679138531

Gretel Dayna D'Souza, MD practises Rheumatology in Sylmar, California. Qualified in 2018, 8 years ago. Practices with Lakeside Medical Organization a Medical Group Inc, a 65-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
8
Licensed in
CA
In the registry since
2019
Specialties on file
2
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

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

Sylmar, CA

No coordinates on file. Search this address in Google Maps

Additional practice locations (1)

  • Sbch, Medical Education, Santa Barbara, CA 93015 — (805) 569-7315

Specialties & licences

Rheumatology Physician (primary) Taxonomy 207RR0500X · Licence 178675 (CA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1679138531
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 7, 2019
Last updated in NPPESJuly 27, 2022
Certification dateJuly 27, 2022

Medicare enrollment

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

Medicare specialtyRHEUMATOLOGY
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice Lakeside Medical Organization A Medical Group Inc — 65 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 $3,545 114 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.

Colleagues at Lakeside Medical Organization a Medical Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 65 clinicians in the practice; 12 are shown here.

Other providers in Sylmar