Gemma Melanie Armstrong, D.O.
Family Medicine · Havre De Grace, MD
At a glance
253 Lewis Ln, Havre De Grace, MD 21078-3750
NPPES record updated Dec 15, 2015. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
253 Lewis Ln Suite 202Havre De Grace, MD 21078-3750
Education & affiliations
- Medical / professional school
- Lake Erie College Of Osteopathic Medicine, Erie
- Graduation year
- 2007
- CMS specialties
- Family Practice
Practice groups
Reported hospital affiliations
- Umd Upper Chesapeake Medical Center Bel Air, MD
- Union Hospital Of Cecil County Elkton, MD
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Family Medicine
- Taxonomy code
- 207Q00000X
- Enumeration date
- May 22, 2008
- Record updated
- Dec 15, 2015
More registry details
- Provider type
- Individual · Type 1
- Other reported name
- GEMMA M ARIAS
- Reported credentials
- D.O.
Reported taxonomies and licenses
207Q00000X · Primary
License reported: H77365 MD
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
253 Lewis LnSuite 202
Havre De Grace, MD 21078-3750
- Phone
- (443) 502-7060
- Fax
- (410) 378-9922
Mailing address
PO BOX 99CONOWINGO, MD 219180099
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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