Maria D. Merzouk, D.O.
Gynecologic Oncology Physician · Hagerstown, MD
Maria D. Merzouk, D.O. is a gynecologic oncology physician with a practice address in Hagerstown, Maryland, and NPI 1811908023, issued on Aug 11, 2006. Check the license (Maryland H85851, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Maria D. Merzouk
- Credential
- D.O.
- Primary taxonomy
- Gynecologic Oncology Physician 207VX0201X
- License numbers
- H85851 MD
2181 WV
Self-reported in NPPES; status is on the state search - Practice location
- 11110 Medical Campus RD Ste 249, Hagerstown, MD 21742
- Phone
- (301) 714-4100
- Enumerated
- Aug 11, 2006
- Record last updated
- Jul 13, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (301) 714-4101
- Medicaid ID
- 3810005936 WV
- Medicare enrollment
- Enrolled (PECOS I20180730001488); accepts Medicare assignment
- Medical or professional school
- West Virginia School Of Osteopathic Medicine, 2001
- Entity
- Type 1 · individual
8 nearest gynecologic oncology physician records → All 37 in Maryland → Look up another NPI →
Also registered at 11110 Medical Campus RD Ste 249
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Chikezie Eseonu, MDNeurological Surgery Physician1528382173
- Adrian Garza-Cavazos, M.D.Obstetrics & Gynecology Physician1265839179
- Anna Harty, CNMAdvanced Practice Midwife1366073769
- Kendra Magner, CNMAdvanced Practice Midwife1063921856
- Julie PaezMidwife1588265037
- Cassandra Prasad, NPFamily Nurse Practitioner1275174377
Verify Maria D. Merzouk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license H85851Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average gynecologic oncology physician in 2024
97 Medicare Part D claims for 45 beneficiaries, against an average of 195 among the 1,475 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Estradiol24 claims
- Estradiol (Twice Weekly)11 claims
- Premarin11 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
- Medical Practices OF Antietam, LLCHagerstown, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maria D. Merzouk among 37 gynecologic oncology physician records in Maryland
Maria D. Merzouk, D.O. is one of 37 gynecologic oncology physician records with a practice address in Maryland. 86% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 51% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2001 · median 2002 among the 26 with a school on file
- Record last updated2018 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VX0201X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gynecologic Oncology Physician providers in Maryland
There are 37 gynecologic oncology physician records in Maryland.
All 37 in Maryland → Every provider in Hagerstown → Gynecologic Oncology Physician nationwide →
The 8 gynecologic oncology physician records with the nearest ZIP codes
- Nicholas Lambrou, MDAnnapolis, MD 214011831113950
- Christine Santayana, D.O.Annapolis, MD 214011023472578
- James Ferriss, MDBaltimore, MD 212871114129541
- Kara Long Roche, M.D.Baltimore, MD 212871629269642
- Amanda RamosBaltimore, MD 212871538502489
- Stephanie Wethington, M.D.Baltimore, MD 212871639329592
- Charita Roque, M.D., M.P.H.Baltimore, MD 212241487002002
- Abbie Fields, MDBaltimore, MD 212151811971898
Common questions
What is Maria D. Merzouk, D.O.'s NPI number?
Maria D. Merzouk, D.O.'s National Provider Identifier (NPI) is 1811908023, issued on Aug 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Maria D. Merzouk, D.O. located?
The NPPES record lists a practice address at 11110 Medical Campus RD Ste 249, Hagerstown, MD, 21742. Phone: (301) 714-4100. Providers update this record themselves, so call before visiting.
How can I verify Maria D. Merzouk, D.O.'s license?
NPPES lists Maryland license number H85851, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Maria D. Merzouk, D.O. prescribe under Medicare Part D?
In 2024, Maria D. Merzouk, D.O. had 97 Medicare Part D claims for 45 beneficiaries; the average among gynecologic oncology physician prescribers was 195. 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.