Are you Marc B. Armstrong, M.D.? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileWhere to find Marc B. Armstrong, M.D.
- Aberdeen location main office
305 S State St, Aberdeen, SD 57401 - Brooksville location
11375 Cortez Blvd, Brooksville, FL 34613
About Dr. Armstrong
Marc B. Armstrong, M.D. practices internal medicine in Aberdeen, SD. Marc is also listed as specializing in student in an organized health care education program. According to Medicare claims data, Marc cared for 751 Medicare patients across 795 services. The services billed most often include emergency department visit with high level of medical decision making, emergency department visit with moderate level of medical decision making, and critical care, first 30-74 minutes. The provider's National Provider Identifier (NPI) is 1326453556.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (605) 622-5100
- Email not available
Practice Locations
305 S STATE ST
Aberdeen, SD 57401
11375 Cortez Blvd
Brooksville, FL 34613
Conditions Commonly Evaluated or Treated
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Cancer Prevention
Cancer risk
Environmental health
- Asbestos Exposure
- Contaminated drinking water exposure
- Heat exhaustion and heat stroke
- Radon gas exposure
- Tick bite and Lyme disease risk
- Toxic Mold Exposure
- Wildfire smoke and air pollution exposure
- Workplace Chemical Exposure
General wellness
Heart health
Infectious Disease
Infectious disease
Kidney health
Lifestyle & wellness
Lifestyle health
Longevity
Metabolic & Lifestyle
Occupational health
Occupational Health
Rashes & allergy
Sexual Health
Sexual health
Substance use
Travel health
Wellness and energy
Workplace health
Most searched conditions
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Kidney and urinary
Respiratory
Blood & Circulation
Blood disorders
Brain & Nerves
Brain and nerves
Cardiac and vascular
Digestive
Heart & Circulation
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Addiction & habits
Cancer screening
Cancer Screening
Checkups & exams
Chronic illness
Diagnostics & screening
Environmental health
Fitness & body composition
Heart & Circulation
- Blood Pressure Check
- Heart monitor
Heart & circulation
Heart health
Hospital-based procedures
Imaging referral
Immunizations
Infection & Microbiology Tests
- STI and STD Screening
- H. Pylori Breath Test
Lifestyle & Prevention
Longevity
Lower endoscopy
Lungs & Breathing
Metabolic & Weight
Metabolic health
Occupational health
Occupational Health
Office Procedures
Preventive and evaluation
- Preoperative medical clearance
- Medication management
- Post-hospital transitional care
Preventive imaging
Preventive screening
Routine Blood Tests
Screening & labs
Screening and diagnostic testing
- Blood pressure screening
- Cancer screening and prevention planning
- Diabetes and prediabetes screening
- EKG
- Spirometry
Screenings & Diagnostics
Travel Health
Travel medicine
Wellness
Wellness & Screening
Workplace health
Skin growths
Sleep
Most searched procedures
Bones & Joints
Brain and nerves
Digestive
- Endoscopy
Exams & Consultations
Lab tests
Minor procedures
- Ingrown toenail removal
- Suture removal
Office procedures
Pain management
Preventive & Routine Care
Sexual health
Procedures Most Often Billed to Medicare
795 services · 751 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
486 | More than most peers in Internal Medicine |
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
186 | More than most peers in Internal Medicine |
| Critical care, first 30-74 minutes | Office visit | 99291 |
123 | More often than most peers in Internal Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Common questions
What does Marc B. Armstrong specialize in?
Marc B. Armstrong is an internist in Aberdeen, SD. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where is Marc B. Armstrong located?
Marc B. Armstrong is listed at 305 S State St, Aberdeen, SD 57401. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Marc B. Armstrong's phone number?
The number on file is (605) 622-5100. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Marc B. Armstrong's NPI number?
Marc B. Armstrong's National Provider Identifier is 1326453556. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has Marc B. Armstrong been practicing?
Marc B. Armstrong has 12+ years experience. Registered with an NPI since 2014. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Marc B. Armstrong do most often?
According to Medicare billing data, Marc B. Armstrong the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Marc B. Armstrong confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Marc B. Armstrong. If this is you, claiming it is free.
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