Stephen Groendyk, DO
Internal Medicine Physician · Pueblo, CO
Stephen Groendyk, DO is an internal medicine physician with a practice address in Pueblo, Colorado, and NPI 1659868479, issued on Apr 17, 2018. Check the license (Colorado TL.0007292, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Stephen Groendyk
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- TL.0007292 CO
Self-reported in NPPES; status is on the state search - Practice location
- 400 W 16TH St, Pueblo, CO 81003
- Phone
- (171) 958-4400
- Enumerated
- Apr 17, 2018
- Record last updated
- Apr 17, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210908002220); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 400 W 16TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stephen Groendyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license TL.0007292Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
39 Medicare Part D claims for 21 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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): 89.3 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).
Bills Medicare through one group practice
- Northern Colorado Hospitalists Professional LLCFort Collins, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Groendyk among 2,046 internal medicine physician records in Colorado
Stephen Groendyk, DO is one of 2,046 internal medicine physician records with a practice address in Colorado. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 87% of them.
- NPI issued2018 · 87% of these records are older, 11% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2018 · median 2006 among the 1,090 with a school on file
- Record last updated2018 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
91 internal medicine physician records list a practice address in Pueblo
They are 91 of the 3,717 NPPES records with a practice address in Pueblo, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Pueblo → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lev Asherov, MDPueblo, CO 810031164685228
- Opeyemi Banjoko, MDPueblo, CO 810031134373020
- Carl Bartecchi, M.D.Pueblo, CO 810031457335705
- Suneel Boyareddygari, MDPueblo, CO 810031730262478
- Douglas Duffee, M.D.Pueblo, CO 810031851372320
- Indira Kedlaya, MDPueblo, CO 810031891771382
- Janice Kulik, M.D.Pueblo, CO 810031487615928
- Robert Manguso, M.D.Pueblo, CO 810031568405892
Common questions
What is Stephen Groendyk, DO's NPI number?
Stephen Groendyk, DO's National Provider Identifier (NPI) is 1659868479, issued on Apr 17, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Groendyk, DO located?
The NPPES record lists a practice address at 400 W 16TH St, Pueblo, CO, 81003. Phone: (171) 958-4400. Providers update this record themselves, so call before visiting.
How can I verify Stephen Groendyk, DO's license?
NPPES lists Colorado license number TL.0007292, 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 Stephen Groendyk, DO prescribe under Medicare Part D?
In 2024, Stephen Groendyk, DO had 39 Medicare Part D claims for 21 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Stephen Groendyk, DO's MIPS final score?
The 2023 MIPS final score is 89.3 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.