Karen M. Guzzetta, M.D.
Internal Medicine Physician · Denver, CO
Karen M. Guzzetta, M.D. is an internal medicine physician with a practice address in Denver, Colorado, and NPI 1558446104, issued on Oct 25, 2006. Check the license (Colorado 37553, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Karen M. Guzzetta
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 37553 CO
Self-reported in NPPES; status is on the state search - Practice location
- 2525 S Downing St, Denver, CO 80210
- Phone
- (303) 765-6892
- Enumerated
- Oct 25, 2006
- Record last updated
- Sep 14, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 40427846 CO
- Medicare enrollment
- Enrolled (PECOS I20050827000148); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1996
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 2525 S Downing St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- John Batiuchok, MDPsychiatry Physician1184637761
- Jessica Batten, PAPhysician Assistant1235620402
Verify Karen M. Guzzetta in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 37553Check 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
18 Medicare Part D claims for 14 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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): 77.2 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).
Bills Medicare through one group practice
- Portercare Adventist Health SystemDenver, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen M. Guzzetta among 2,046 internal medicine physician records in Colorado
Karen M. Guzzetta, M.D. 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1996 · median 2006 among the 1,090 with a school on file
- Record last updated2011 · 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).
493 internal medicine physician records list a practice address in Denver
They are 493 of the 25,068 NPPES records with a practice address in Denver, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Denver → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Jay Krakovitz, M.D.Denver, CO 802101699778936
- Inna Lozinskaya, M.D.Denver, CO 802101942248638
Common questions
What is Karen M. Guzzetta, M.D.'s NPI number?
Karen M. Guzzetta, M.D.'s National Provider Identifier (NPI) is 1558446104, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen M. Guzzetta, M.D. located?
The NPPES record lists a practice address at 2525 S Downing St, Denver, CO, 80210. Phone: (303) 765-6892. Providers update this record themselves, so call before visiting.
How can I verify Karen M. Guzzetta, M.D.'s license?
NPPES lists Colorado license number 37553, 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 M. Guzzetta, M.D. prescribe under Medicare Part D?
In 2024, Karen M. Guzzetta, M.D. had 18 Medicare Part D claims for 14 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Karen M. Guzzetta, M.D.'s MIPS final score?
The 2023 MIPS final score is 77.2 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.