Karen Marsden
Internal Medicine Physician · Greenwood Village, CO
Karen Marsden is an internal medicine physician with a practice address in Greenwood Village, Colorado, and NPI 1720440316, issued on Mar 23, 2016. Check the license (Colorado 61991, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Karen Marsden
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 61991 CO
DR.0061991 CO
Self-reported in NPPES; status is on the state search - Practice location
- 5200 Dtc Pkwy Ste 400, Greenwood Village, CO 80111
- Phone
- (303) 745-0000
- Enumerated
- Mar 23, 2016
- Record last updated
- May 23, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190613002139); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2016
- Entity
- Type 1 · individual
Also registered at 5200 Dtc Pkwy Ste 400
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kimberly Collins, APNGerontology Nurse Practitioner1144772799
- Kevin Fasing, PASurgical Physician Assistant1346881109
- Susan Flood-Cook, D.O.Hospitalist Physician1104018407
- Jennifer Griffith, M.D.Hospitalist Physician1134361249
- Robyn King, AGNP-CGerontology Nurse Practitioner1871070862
- Monet Meter, D.O.Hospitalist Physician1457706079
Verify Karen Marsden in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 61991Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
149 Medicare Part D claims for 74 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone17 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): 77.9 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
- Critical Care And Pulmonary Consultants, P.C.Greenwood Village, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
37 internal medicine physician records list a practice address in Greenwood Village
They are 37 of the 2,654 NPPES records with a practice address in Greenwood Village, and 2,046 internal medicine physician records in Colorado.
All 37 in Greenwood Village → All 2,046 in Colorado → Every provider in Greenwood Village →
Other internal medicine physician records in Colorado
- Emily Aaron, MDDenver, CO1205256971
- David Abbey, MS MDFort Collins, CO1568483196
- Tyler Abbey, DOGreeley, CO1730572694
- Sahar Abdelqader, MDLongmont, CO1366600710
- Ahmed Abdulrahman, MDPueblo, CO1093425068
- Durant Abernethy, M.D.Frisco, CO1427289040
- Alan Aboaf, MDCentennial, CO1003866393
- Adam Abraham, MDAurora, CO1720178304
- Phebe Abraham, MDGreeley, CO1558980540
- Richard Abrams, M.D.Denver, CO1174645386
Common questions
What is Karen Marsden's NPI number?
Karen Marsden's National Provider Identifier (NPI) is 1720440316, issued on Mar 23, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Karen Marsden located?
The NPPES record lists a practice address at 5200 Dtc Pkwy Ste 400, Greenwood Village, CO, 80111. Phone: (303) 745-0000. Providers update this record themselves, so call before visiting.
How can I verify Karen Marsden's license?
NPPES lists Colorado license number 61991, 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 Karen Marsden prescribe under Medicare Part D?
In 2024, Karen Marsden had 149 Medicare Part D claims for 74 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Karen Marsden's MIPS final score?
The 2023 MIPS final score is 77.9 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.