Mark A. Tretiak, MD
Obstetrics & Gynecology Physician · Mc Lean, VA
Mark A. Tretiak, MD is an obstetrics & gynecology physician with a practice address in Mc Lean, Virginia, and NPI 1851451322, issued on Dec 12, 2006. Check the license (Virginia 0101059094, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Mark A. Tretiak
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 0101059094 VA
MD30245 DC
D0052092 MD
Self-reported in NPPES; status is on the state search - Practice location
- 8008 Westpark Dr, Mc Lean, VA 22102
- Phone
- (703) 287-4550
- Enumerated
- Dec 12, 2006
- Record last updated
- Jun 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (703) 287-4551
- Medicare enrollment
- Enrolled (PECOS I20090702000001); accepts Medicare assignment
- Medical or professional school
- Albany Medical College Of Union University, 1993
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,174 in Virginia → Look up another NPI →
Also registered at 8008 Westpark Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Adebunmi Adeyiga, MDPediatric Radiology Physician1801057062
- Julie Ambrose, M.D.Obstetrics & Gynecology Physician1043263163
- David An, M.D.Internal Medicine Physician1972922862
- Robert Antoniuk, M.D.Emergency Medicine Physician1285849117
Verify Mark A. Tretiak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101059094Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
32% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
112 Medicare Part D claims for 52 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Estradiol35 claims
- Climara13 claims
- Medroxyprogesterone Acetate11 claims
- Yuvafem11 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.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF The Mid Atlantic States, IncLargo, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Tretiak among 1,174 obstetrics & gynecology physician records in Virginia
Mark A. Tretiak, MD is one of 1,174 obstetrics & gynecology physician records with a practice address in Virginia. 72% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 51% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1993 · median 2005 among the 701 with a school on file
- Record last updated2021 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Virginia
There are 1,174 obstetrics & gynecology physician records in Virginia.
All 1,174 in Virginia → Every provider in Mc Lean → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Julie Ambrose, M.D.Mc Lean, VA 221021043263163
- Adeline Coleman, MDMc Lean, VA 221021518001767
- Kristin Gorelik, M.D.Mc Lean, VA 221021750510525
- Kristin Knight, MDMc Lean, VA 221021902815699
- Stephanie Swanson, M.D.Mc Lean, VA 221021811285612
- Nazaneen Homaifar, M.D., M.B.AMc Lean, VA 221011922441930
- Eva Li, D.O.Mc Lean, VA 221011487066437
- Michael Ross, MDMc Lean, VA 221011366459059
Common questions
What is Mark A. Tretiak, MD's NPI number?
Mark A. Tretiak, MD's National Provider Identifier (NPI) is 1851451322, issued on Dec 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Tretiak, MD located?
The NPPES record lists a practice address at 8008 Westpark Dr, Mc Lean, VA, 22102. Phone: (703) 287-4550. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Tretiak, MD's license?
NPPES lists Virginia license number 0101059094, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark A. Tretiak, MD prescribe under Medicare Part D?
In 2024, Mark A. Tretiak, MD had 112 Medicare Part D claims for 52 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.