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

Catherine Jonnakuty Ellis, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1548473150

Catherine Jonnakuty Ellis, MD practises Endocrinology in Leesburg, Virginia. Qualified in 2001, 25 years ago. Practices with Loudoun Medical Group, PC, a 274-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Pennsylvania and Virginia.

Years since qualifying
25
Licensed in
PA, VA
In the registry since
2007
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

19450 Deerfield Ave Ste 200
Leesburg, VA 20176-6821
Phone: (703) 844-8380
Fax: (703) 263-8393
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 0101259955 (VA)
Endocrinology, Diabetes & Metabolism Physician Taxonomy 207RE0101X · Licence MT189022 (PA)

Record details

NPI number1548473150
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 8, 2007
Last updated in NPPESOctober 9, 2023
Certification dateOctober 9, 2023

Medicare enrollment

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

Medicare specialtyENDOCRINOLOGY
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice Loudoun Medical Group, Pc — 274 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients173
Services billed 412 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 $580 21 payments · a meal or drink at a meeting or visit, not a fee
Education $28 2 payments · educational material or training, 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 Loudoun Medical Group, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 274 clinicians in the practice; 12 are shown here.

Other providers in Leesburg