Karen Roberta Maser, M.D.
Obstetrics & Gynecology Physician · Fairfax, VA
Karen Roberta Maser, M.D. is an obstetrics & gynecology physician with a practice address in Fairfax, Virginia, and NPI 1699834986, issued on Dec 6, 2006. Check the license (Virginia 0101058017, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Karen Roberta Maser
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 0101058017 VA
Self-reported in NPPES; status is on the state search - Practice location
- 8505 Arlington Blvd Ste 410, Fairfax, VA 22031
- Phone
- (703) 560-9070
- Enumerated
- Dec 6, 2006
- Record last updated
- Sep 4, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (703) 560-9024
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,174 in Virginia → Look up another NPI →
Also registered at 8505 Arlington Blvd Ste 410
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Travis De Mik, M.D.Obstetrics & Gynecology Physician1629277322
Verify Karen Roberta Maser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101058017Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
35 Medicare Part D claims for 16 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol13 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.
Karen Roberta Maser among 1,174 obstetrics & gynecology physician records in Virginia
Karen Roberta Maser, M.D. 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 fileNo · 60% of these records are
- Record last updated2014 · 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 Fairfax → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Glenna Andersen, MDFairfax, VA 220311447241989
- David Berry, M.D.Fairfax, VA 220311437239613
- David Carlson, M.D.Fairfax, VA 220311801981048
- Ivette Couret, MDFairfax, VA 220311023082864
- Shawn Davis-Wilensky, MD, MPHFairfax, VA 220311851593289
- Sanda Dipaolo, MDFairfax, VA 220311982709978
- Nancy Hafner, M.D.Fairfax, VA 220311558375857
- Chun Sheng Lee, MDFairfax, VA 220311306917778
Common questions
What is Karen Roberta Maser, M.D.'s NPI number?
Karen Roberta Maser, M.D.'s National Provider Identifier (NPI) is 1699834986, issued on Dec 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen Roberta Maser, M.D. located?
The NPPES record lists a practice address at 8505 Arlington Blvd Ste 410, Fairfax, VA, 22031. Phone: (703) 560-9070. Providers update this record themselves, so call before visiting.
How can I verify Karen Roberta Maser, M.D.'s license?
NPPES lists Virginia license number 0101058017, 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 Karen Roberta Maser, M.D. prescribe under Medicare Part D?
In 2024, Karen Roberta Maser, M.D. had 35 Medicare Part D claims for 16 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.