Gregory John Starsiak, DO
Family Medicine Physician · Thornton, CO
Gregory John Starsiak, DO is a family medicine physician with a practice address in Thornton, Colorado, and NPI 1578025367, issued on Apr 2, 2019. Check the license (Colorado DR.0070915, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory John Starsiak
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- DR.0070915 CO
Self-reported in NPPES; status is on the state search - Practice location
- 4075 E 128TH Ave, Thornton, CO 80241
- Phone
- (303) 925-4210
- Enumerated
- Apr 2, 2019
- Record last updated
- Jun 28, 2023
- Fax
- (303) 925-4212
- Medicaid ID
- 0487504 OH
- Medicare enrollment
- Enrolled (PECOS I20230525001865); accepts Medicare assignment
- Medical or professional school
- Kansas City University Of Med & Biosciences, College Of Osteo Med, 2019
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,563 in Colorado → Look up another NPI →
Also registered at 4075 E 128TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Berger, M.D.Family Medicine Physician1861474488
- Dallas Bogner, MDFamily Medicine Physician1396780144
- Katherine Danielson, CNMAdvanced Practice Midwife1598257297
- Corinn Gayer, DOFamily Medicine Physician1518329929
- Brianne Hogue, NPFamily Nurse Practitioner1538605159
- Genevieve Ochs, MDFamily Medicine Physician1457763237
Verify Gregory John Starsiak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0070915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average family medicine physician in 2024
639 Medicare Part D claims for 134 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Meloxicam47 claims
- Lisinopril35 claims
- Atorvastatin Calcium26 claims
- Levothyroxine Sodium22 claims
- Eliquis19 claims
- Omeprazole19 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 88.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $104.64
5 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Catholic Health Initiatives ColoradoThornton, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory John Starsiak among 3,563 family medicine physician records in Colorado
Gregory John Starsiak, DO is one of 3,563 family medicine physician records with a practice address in Colorado. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 87% of them.
- NPI issued2019 · 87% of these records are older, 10% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2019 · median 2008 among the 2,077 with a school on file
- Record last updated2023 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
47 family medicine physician records list a practice address in Thornton
They are 47 of the 2,234 NPPES records with a practice address in Thornton, and 3,563 family medicine physician records in Colorado.
All 3,563 in Colorado → Every provider in Thornton → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Paul Berger, M.D.Thornton, CO 802411861474488
- Dallas Bogner, MDThornton, CO 802411396780144
- Corinn Gayer, DOThornton, CO 802411518329929
- Genevieve Ochs, MDThornton, CO 802411457763237
- Jun Kim, DODenver, CO 802391609664044
- Lauren MartinDenver, CO 802391548107402
- Lauren Rhoades, M.D.Denver, CO 802391669815080
- Bonnie Buechel, MDDenver, CO 802381598293318
Common questions
What is Gregory John Starsiak, DO's NPI number?
Gregory John Starsiak, DO's National Provider Identifier (NPI) is 1578025367, issued on Apr 2, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Gregory John Starsiak, DO located?
The NPPES record lists a practice address at 4075 E 128TH Ave, Thornton, CO, 80241. Phone: (303) 925-4210. Providers update this record themselves, so call before visiting.
How can I verify Gregory John Starsiak, DO's license?
NPPES lists Colorado license number DR.0070915, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory John Starsiak, DO prescribe under Medicare Part D?
In 2024, Gregory John Starsiak, DO had 639 Medicare Part D claims for 134 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Gregory John Starsiak, DO's MIPS final score?
The 2023 MIPS final score is 88.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.