John Armstrong, MD
Anesthesiology Physician · Aurora, CO
John Armstrong, MD is an anesthesiology physician with a practice address in Aurora, Colorado, and NPI 1881709152, issued on Aug 20, 2006. Check the license (Colorado 21903, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Armstrong
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 21903 CO
Self-reported in NPPES; status is on the state search - Practice location
- 12605 E 16TH Ave, Aurora, CO 80045
- Phone
- (720) 848-0000
- Enumerated
- Aug 20, 2006
- Record last updated
- Oct 5, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 01219039 CO
- Entity
- Type 1 · individual
Also registered at 12605 E 16TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benjamin Aakre, MDAnesthesiology Physician1407140395
- Alec Aaronson, DOPsychiatry Physician1972065233
- Mona Abaza, MDOtolaryngology Physician1043313844
- Meagan AbbagnaroAnesthesiologist Assistant1851254262
- Jean Abbott, MDEmergency Medicine Physician1578672820
- Adam Abraham, MDInternal Medicine Physician1720178304
Verify John Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 21903Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average anesthesiology physician in 2024
16 Medicare Part D claims, against an average of 402 among the 4,319 providers of this specialty who prescribed in Part D.
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.
Anesthesiology Physician providers in Colorado
There are 1,202 anesthesiology physician records in Colorado.
Other anesthesiology physician records in Colorado
- Benjamin Aakre, MDAurora, CO1407140395
- Richard Abbott, MDGreenwood Village, CO1508839333
- James Abercrombie, MDColorado Springs, CO1184204711
- Benjamin Abrams, MDAurora, CO1619316742
- Peter Abromaitis, M.D.Wheat Ridge, CO1205277449
- David Abts, M.D.Aurora, CO1598086118
- Henri Acosta, MDGreenwood Village, CO1114073798
- Ryan Adams, MDFort Collins, CO1154448611
- Aaron Adler, MDBoulder, CO1932738358
- Aalok Agarwala, MDAurora, CO1699801068
Common questions
What is John Armstrong, MD's NPI number?
John Armstrong, MD's National Provider Identifier (NPI) is 1881709152, issued on Aug 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Armstrong, MD located?
The NPPES record lists a practice address at 12605 E 16TH Ave, Aurora, CO, 80045. Phone: (720) 848-0000. Providers update this record themselves, so call before visiting.
How can I verify John Armstrong, MD's license?
NPPES lists Colorado license number 21903, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Armstrong, MD prescribe under Medicare Part D?
In 2024, John Armstrong, MD had 16 Medicare Part D claims; the average among anesthesiology physician prescribers was 402. 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.