Gemma Melanie Armstrong, D.O.
Family Medicine Physician · Havre De Grace, MD
Gemma Melanie Armstrong, D.O. is a family medicine physician with a practice address in Havre De Grace, Maryland, and NPI 1306003652, issued on May 22, 2008. Check the license (Maryland H77365, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Gemma Melanie Armstrong
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- H77365 MD
Self-reported in NPPES; status is on the state search - Practice location
- 253 Lewis LN, Havre De Grace, MD 21078
- Phone
- (443) 502-7060
- Enumerated
- May 22, 2008
- Record last updated
- Dec 15, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (410) 378-9922
- Medicaid ID
- 102577005 MD
- Medicare enrollment
- Enrolled (PECOS I20160429000346); may accept Medicare assignment
- Medical or professional school
- Lake Erie College Of Osteopathic Medicine, Erie, 2007
- Entity
- Type 1 · individual
Also registered at 253 Lewis LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Braxton, P.A.Physician Assistant1902809734
- Hyon Schneider, M.D.Pain Medicine (Physical Medicine & Rehabilitation) Physician1487814042
Verify Gemma Melanie Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license H77365Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average family medicine physician in 2024
2,981 Medicare Part D claims for 241 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Atorvastatin Calcium188 claims
- Lisinopril175 claims
- Levothyroxine Sodium131 claims
- Metformin Hcl118 claims
- Amlodipine Besylate109 claims
- Gabapentin93 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: $21.70
1 payment: food and beverage; the largest payer was Dexcom, 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.
Bills Medicare through 2 group practices
- Agape Physical Therapy And Sports Rehabilitation LPForest Hill, MD
- West Cecil Health Center Inc.Conowingo, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
7 family medicine physician records list a practice address in Havre De Grace
They are 7 of the 360 NPPES records with a practice address in Havre De Grace, and 1,912 family medicine physician records in Maryland.
All 7 in Havre De Grace → All 1,912 in Maryland → Every provider in Havre De Grace →
Other family medicine physician records in Maryland
- Amelia Abban, CRNP-BCLaurel, MD1023761970
- Peter Abbott, MDWillards, MD1982603759
- Hanan Aboumatar, MD, MPHBaltimore, MD1437526746
- Ndubuisi Achufusi, M.D.Greenbelt, MD1124057260
- Jose Acol, MDMount Airy, MD1801890306
- Phyllis Acquah, M.D.Silver Spring, MD1285996868
- Charles Adamo, M.D.Annapolis, MD1063437358
- Gillian Adams, M.D.Bel Air, MD1912086794
- Jerry Adams, M.D.Lavale, MD1710088265
- Ifeoluwa AdekanyeDundalk, MD1699419804
Common questions
What is Gemma Melanie Armstrong, D.O.'s NPI number?
Gemma Melanie Armstrong, D.O.'s National Provider Identifier (NPI) is 1306003652, issued on May 22, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Gemma Melanie Armstrong, D.O. located?
The NPPES record lists a practice address at 253 Lewis LN, Havre De Grace, MD, 21078. Phone: (443) 502-7060. Providers update this record themselves, so call before visiting.
How can I verify Gemma Melanie Armstrong, D.O.'s license?
NPPES lists Maryland license number H77365, 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 Gemma Melanie Armstrong, D.O. prescribe under Medicare Part D?
In 2024, Gemma Melanie Armstrong, D.O. had 2,981 Medicare Part D claims for 241 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.