Mark W. Ptaskiewicz, MD
Internal Medicine Physician · Westminster, CO
Mark W. Ptaskiewicz, MD is an internal medicine physician with a practice address in Westminster, Colorado, and NPI 1043347099, issued on Feb 27, 2007. Check the license (Colorado 36000, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark W. Ptaskiewicz
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 36000 CO
Self-reported in NPPES; status is on the state search - Practice location
- 7701 Sheridan Blvd, Westminster, CO 80003
- Phone
- (303) 338-4545
- Enumerated
- Feb 27, 2007
- Record last updated
- Apr 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 01360007 CO
- Medicare enrollment
- Enrolled (PECOS I20080528000281); may accept Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 1991
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 7701 Sheridan Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Paulanne Balch, MDFamily Medicine Physician1114054160
Verify Mark W. Ptaskiewicz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 36000Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.2 times the Medicare Part D claims of the average internal medicine physician in 2024
13,306 Medicare Part D claims for 879 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 627 claims were for opioids.
Most prescribed
- Atorvastatin Calcium1,011 claims
- Lisinopril610 claims
- Rosuvastatin Calcium497 claims
- Levothyroxine Sodium469 claims
- Tamsulosin Hcl427 claims
- Omeprazole419 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.
Mark W. Ptaskiewicz among 2,046 internal medicine physician records in Colorado
Mark W. Ptaskiewicz, MD 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 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 39% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1991 · median 2006 among the 1,090 with a school on file
- Record last updated2021 · 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).
42 internal medicine physician records list a practice address in Westminster
They are 42 of the 2,492 NPPES records with a practice address in Westminster, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Westminster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rebecca Agnew, M.D.Westminster, CO 800031093845836
- Christine Bellantoni, MDWestminster, CO 800031477507796
- Terrence Boland, MDWestminster, CO 800031851428817
- Lori BrooksWestminster, CO 800031215067079
- Cynthia IrelandArvada, CO 800031851435572
- Kelly Jeong, MDArvada, CO 800031487781431
- Matha JohnsonWestminster, CO 800031487798013
- Joel Jorgenson, M.D.Westminster, CO 800031457627267
Common questions
What is Mark W. Ptaskiewicz, MD's NPI number?
Mark W. Ptaskiewicz, MD's National Provider Identifier (NPI) is 1043347099, issued on Feb 27, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark W. Ptaskiewicz, MD located?
The NPPES record lists a practice address at 7701 Sheridan Blvd, Westminster, CO, 80003. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.
How can I verify Mark W. Ptaskiewicz, MD's license?
NPPES lists Colorado license number 36000, 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 Mark W. Ptaskiewicz, MD prescribe under Medicare Part D?
In 2024, Mark W. Ptaskiewicz, MD had 13,306 Medicare Part D claims for 879 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.