Constantine John Tsamasfyros, M.D.
Family Medicine Physician · Denver, CO
Constantine John Tsamasfyros, M.D. is a family medicine physician with a practice address in Denver, Colorado, and NPI 1114989332, issued on Apr 4, 2006. Check the license (Colorado 17165, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Constantine John Tsamasfyros
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 17165 CO
Self-reported in NPPES; status is on the state search - Practice location
- 128 Steele St, Denver, CO 80206
- Phone
- (303) 322-2005
- Enumerated
- Apr 4, 2006
- Record last updated
- Apr 27, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (303) 322-4408
- Medicaid ID
- 01171651 CO
- Medicare enrollment
- Enrolled (PECOS I20090831000193); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 1970
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,563 in Colorado → Look up another NPI →
Verify Constantine John Tsamasfyros in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 17165Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% more Medicare Part D claims than the average family medicine physician in 2024
4,476 Medicare Part D claims for 224 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 284 claims were for opioids.
Most prescribed
- Atorvastatin Calcium283 claims
- Amlodipine Besylate187 claims
- Potassium Chloride171 claims
- Famotidine163 claims
- Oxycodone Hcl163 claims
- Lisinopril140 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.
Industry payments in 2024: $1,148.91
54 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.
Constantine John Tsamasfyros among 3,563 family medicine physician records in Colorado
Constantine John Tsamasfyros, M.D. 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 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 56% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1970 · median 2008 among the 2,077 with a school on file
- Record last updated2017 · 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).
457 family medicine physician records list a practice address in Denver
They are 457 of the 25,068 NPPES records with a practice address in Denver, and 3,563 family medicine physician records in Colorado.
All 3,563 in Colorado → Every provider in Denver → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Zachary Anderson, M.D.Denver, CO 802061013925767
- Thomas Blanchard, MDDenver, CO 802061780632133
- Adam Blanning, MDDenver, CO 802061578678454
- Frederick Grover, M.D.Denver, CO 802061346285228
- Brenna Hatami, N.D.Denver, CO 802061528328663
- Lynne Kendig, M.D.Denver, CO 802061770652083
- Daniel Lumian, MDDenver, CO 802061831281294
- Elizabeth McClard, M.D.Denver, CO 802061477668879
Common questions
What is Constantine John Tsamasfyros, M.D.'s NPI number?
Constantine John Tsamasfyros, M.D.'s National Provider Identifier (NPI) is 1114989332, issued on Apr 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Constantine John Tsamasfyros, M.D. located?
The NPPES record lists a practice address at 128 Steele St, Denver, CO, 80206. Phone: (303) 322-2005. Providers update this record themselves, so call before visiting.
How can I verify Constantine John Tsamasfyros, M.D.'s license?
NPPES lists Colorado license number 17165, 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 Constantine John Tsamasfyros, M.D. prescribe under Medicare Part D?
In 2024, Constantine John Tsamasfyros, M.D. had 4,476 Medicare Part D claims for 224 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
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.