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

Dr. Gregory John Starsiak Jr., DO

Individual provider Family Medicine Physician · NPI 1578025367

Dr. Gregory John Starsiak Jr., DO is a Family Practice in Thornton, Colorado. Graduated from Kansas City University of Med & Biosciences, College of Osteo Med in 2019, 7 years ago. Practices with Catholic Health Initiatives Colorado, a 1,266-clinician group and accepts Medicare assignment. Licensed in Colorado.

Years since qualifying
7
Trained at
Kansas City University of Med & Biosciences, College of Osteo Med
Licensed in
CO
In the registry since
2019
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

4075 E 128th Ave
Thornton, CO 80241-2201
Phone: (303) 925-4210
Fax: (303) 925-4212
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence DR.0070915 (CO)

Record details

NPI number1578025367
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedApril 2, 2019
Last updated in NPPESJune 28, 2023
Certification dateJune 28, 2023

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolKANSAS CITY UNIVERSITY OF MED & BIOSCIENCES, COLLEGE OF OSTEO MED
Graduated 2019 (7 years in practice)
Group practice Catholic Health Initiatives Colorado — 1266 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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