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

Katarzyna Agnieszka Mastalerz, MD

Individual provider Internal Medicine Physician · NPI 1861514275

Katarzyna Agnieszka Mastalerz, MD is a Hospitalist in Denver, Colorado. Graduated from University of Pittsburgh School of Medicine in 2007, 19 years ago. Practices with University Physicians Incorporated, a 3,148-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Colorado.

Years since qualifying
19
Trained at
University of Pittsburgh School of Medicine
Licensed in
CO
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

1721 E 19th Ave Ste 520
Denver, CO 80218-1243
Phone: (303) 869-2440
Fax: (303) 869-2544
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 12605 E 16th Ave, Aurora, CO 80045-2545 — (720) 848-0000

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence DR.0048931 (CO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 48931 (CO)

Record details

NPI number1861514275
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 4, 2007
Last updated in NPPESMarch 15, 2023
Certification dateMarch 15, 2023

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF PITTSBURGH SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice University Physicians Incorporated — 3148 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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