Dr. Christopher A. Armstrong, MD
- Medicare services, 2024
- 2,081
- Medicare patients, 2024
- 314
- Part D claims, 2024
- 9,100
- Hospital affiliations
- 2
- Industry payments
- $16
- Practice address
- 800 East 28th Street, Minneapolis, MN 55407
- Practice phone
- Call (612) 863-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Armstrong's professional email, personal email and mobile number
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Dr. Christopher A. Armstrong is an internist in Minneapolis, Minnesota
Dr. Armstrong practices at Abbott Northwestern Hospital in Minneapolis, Minnesota, part of Sutter Health.
Dr. Armstrong's NPI, 1619973195, was assigned on June 21, 2005. Dr. Armstrong graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 1989. Dr. Armstrong holds Minnesota license 35008.
- NPI
- 1619973195NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244284321
- NPI enumeration date
- June 21, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (612) 863-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Christopher A. Armstrong practices at Abbott Northwestern Hospital in Minneapolis, Minnesota
Dr. Armstrong's primary practice is Abbott Northwestern Hospital, at 800 East 28th Street, Minneapolis, MN 55407 in Hennepin County. The practice phone is (612) 863-4000.
- Abbott Northwestern Hospital800 East 28th Street, Minneapolis, MN 55407 · Hennepin CountyPhone(612) 863-4000
Source: Dmand AI Affiliation Data
Dr. Christopher A. Armstrong is affiliated with 6 sites of care and 2 medical groups
Dr. Armstrong's primary practice is Abbott Northwestern Hospital in Minneapolis, Minnesota, part of Sutter Health. Dr. Armstrong is also affiliated with M Health Fairview Southdale Hospital. The medical group on file is Buffalo Hospital. Dmand AI also links Dr. Armstrong to 2 more group practices and clinics, 2 home health agencies and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Christopher A. Armstrong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Armstrong practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Abbott Northwestern Hospital | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Christopher A. Armstrong is one of 2,322 internists in Minnesota
Internal medicine is Dr. Armstrong's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Armstrong is licensed in Minnesota.
Specialties and state licenses
- Internal medicine, MinnesotaPrimary
Internists near Dr. Armstrong
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Christopher A. Armstrong billed Medicare for 2,081 services in 2024
CMS data shows 2,081 Medicare services from Dr. Armstrong across 26 procedure codes in 2024, for 314 Medicare patients. Medicare paid $82,879 for them. Every service was in an office.
Dr. Armstrong's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 8452024: 59430%
- Office and hospital visits
- 2023: 6052024: 5568%
- Other services
- 2023: 2052024: 434112%
- Tests and treatments
- 2023: 2752024: 2596%
- Surgery
- 2023: 3672024: 23835%
Dr. Armstrong compared with the Minnesota median for internists, 2024
- Dr. Armstrong
- Minnesota median
- Medicare services
- 2,081vs 3366.2 times
- Medicare patients
- 314vs 1482.1 times
- Part D claims
- 8,334vs 14457.9 times
Medians across 2,238 internists in Minnesota with Dmand AI profiles that report each measure.
Dr. Armstrong's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Armstrong?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Armstrong and other internists in Minnesota.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Christopher A. Armstrong treated 314 Medicare patients in 2024, average age 76
CMS counts 314 Medicare patients who saw Dr. Armstrong in 2024. The largest group is 75 to 84, with 134 patients. 69% of them have high blood pressure, and 64% have high cholesterol. 8% are also on Medicaid. Their average risk score is 1.28, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Armstrong's median patient age at 70, with 42% women.
Dr. Armstrong's Medicare patients by age, 2024
Dr. Armstrong's Medicare patients by sex, 2024
- Women13142%
- Men18358%
Chronic conditions among Dr. Armstrong's Medicare patients, 2024
- High blood pressure69%
- High cholesterol64%
- Arthritis40%
- Ischemic heart disease29%
- Chronic kidney disease25%
- Atrial fibrillation24%
- Diabetes23%
- Heart failure22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Armstrong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women42%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Christopher A. Armstrong wrote 9,100 Medicare Part D claims in 2024
In 2024, Dr. Armstrong wrote 9,100 Medicare Part D claims for 679 patients. 88% of them were for generic drugs. CMS names the drug for 8,334 of them, across 147 drugs with 11 or more claims each, at $602,772 in total drug cost. In 2023, CMS named 8,619 claims across 151 drugs.
Dr. Armstrong's Part D claims by kind of drug, 2024
- Generic8,017 claims88%
- Brand-name1,017 claims11%
- Other66 claims1%
Dr. Armstrong's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Armstrong's Part D claims, 2024
- Opioids3%277 of 9,100 claims
- Antibiotics2%195 of 9,100 claims
- Antipsychotics, patients 65 and over0%32 of 9,100 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8,6192024: 8,3343%
Drugs named by CMS: 147 in 2024, 151 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Christopher A. Armstrong offers telehealth to Medicare patients
Dr. Armstrong accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Armstrong as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Christopher A. Armstrong received $16 in industry payments in 2023
CMS Open Payments shows 1 general payment to Dr. Armstrong from 1 drug or device company in 2023. Food and beverage make up the largest share, 100% of the total. Halyard Health, Inc. paid the most, $16.
Companies that paid Dr. Armstrong the most, 2023 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Christopher A. Armstrong graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University
Dr. Armstrong graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Christopher A. Armstrong's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Christopher A. Armstrong
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Christopher A. Armstrong's NPI number?
Dr. Christopher A. Armstrong's NPI number is 1619973195. It was assigned on June 21, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Christopher A. Armstrong?
Dr. Christopher A. Armstrong is an internist in Minneapolis, Minnesota. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Christopher A. Armstrong practice?
Dr. Armstrong practices at 800 East 28th Street, Minneapolis, MN 55407. Dr. Armstrong's primary practice is Abbott Northwestern Hospital in Minneapolis, Minnesota, part of Sutter Health. Dmand AI also links Dr. Armstrong to 2 group practices and clinics, 2 home health agencies and 1 medical group.
What is Dr. Christopher A. Armstrong's office phone number?
The practice phone on file for Dr. Armstrong is (612) 863-4000.
What is Dr. Christopher A. Armstrong's medical license number?
Dr. Armstrong holds Minnesota license 35008.
Which hospitals is Dr. Christopher A. Armstrong affiliated with?
Dr. Armstrong practices at Abbott Northwestern Hospital in Minneapolis, Minnesota. Dr. Armstrong is also affiliated with M Health Fairview Southdale Hospital.
What medical group is Dr. Christopher A. Armstrong part of?
Dr. Armstrong is linked to Buffalo Hospital. Dmand AI links Dr. Armstrong to 1 more medical group.
Does Dr. Christopher A. Armstrong accept Medicare?
Yes. CMS data shows Dr. Armstrong billed Medicare for 2,081 services in 2024, and Dr. Armstrong accepts Medicare assignment.
Does Dr. Christopher A. Armstrong offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Armstrong as offering telehealth services.
How many Medicare patients does Dr. Christopher A. Armstrong see?
CMS counts 314 Medicare patients who saw Dr. Armstrong in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Christopher A. Armstrong bill to Medicare?
In 2024, Dr. Armstrong's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and medicare service (G2211).
Where did Dr. Christopher A. Armstrong go to medical school?
Dr. Armstrong graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 1989.
What drugs does Dr. Christopher A. Armstrong prescribe most?
In 2024 Medicare Part D data, Dr. Armstrong's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
Has Dr. Christopher A. Armstrong received payments from drug or device companies?
CMS Open Payments shows $16 in general payments to Dr. Armstrong from 1 company from 2023 to 2023. The largest total came from Halyard Health, Inc.
How long has Dr. Christopher A. Armstrong been practicing?
Dr. Armstrong graduated from medical school in 1989, 37 years ago.
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