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

Katy Lease Lonergan II, MD

Individual provider Hospitalist Physician · NPI 1144394461

Katy Lease Lonergan II, MD is registered under Cardiovascular Disease (Cardiology) in Dallas, Texas. Graduated from Johns Hopkins University School of Medicine in 2002, 24 years ago. Practices with University of Texas Southwestern Medical Center at Dallas, a 3,149-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California and Texas.

Years since qualifying
24
Trained at
Johns Hopkins University School of Medicine
Licensed in
CA, TX
In the registry since
2006
Specialties on file
4
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

5323 Harry Hines Blvd
Dallas, TX 75390-7201 Not confirmed with CMS for 13 years — call before visiting
Phone: (214) 645-8000
Fax: (214) 645-7269
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence P4341 (TX)
Hospitalist Physician Taxonomy 208M00000X · Licence A86361 (CA)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence A86361 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence P4341 (TX)

Record details

NPI number1144394461
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 20, 2006
Last updated in NPPESNovember 28, 2012

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolJOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2002 (24 years in practice)
Group practice University Of Texas Southwestern Medical Center At Dallas — 3149 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 patients1,048
Services billed 1,698 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Parkland Health & Hospital System Hospital · Dallas, TX · listed as Parkland Health and Hospital Systems
  • Ut Of Texas Southwestern University Hospital - William P. Clements Jr. Hospital · Dallas, TX

Colleagues at University of Texas Southwestern Medical Center at Dallas

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3149 clinicians in the practice; 12 are shown here.

Other providers in Dallas