Leslie Leanne Armstrong
Emergency Medicine Physician · Longmont, CO
Leslie Leanne Armstrong is an emergency medicine physician with a practice address in Longmont, Colorado, and NPI 1578730958, issued on May 14, 2008. Check the license (Colorado 49936, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Leslie Leanne Armstrong
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 49936 CO
TL-2407 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1950 Mountain View Ave, Longmont, CO 80501
- Phone
- (303) 306-7783
- Enumerated
- May 14, 2008
- Record last updated
- Feb 28, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (303) 306-7753
- Medicaid ID
- 72925361 CO
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,434 in Colorado → Look up another NPI →
Also registered at 1950 Mountain View Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Heather Adams, CRNACertified Registered Nurse Anesthetist1225055098
- Gary Bock, RPHPharmacist1902598113
- Constance Carroll, P.T.Physical Therapist1609075506
- Katherine Caufield, LCSWClinical Social Worker1518217504
- Lindsey Cesca, M.D.Emergency Medicine Physician1417391301
- Leticia Cisneros, R.PH.Pharmacist1740600121
Verify Leslie Leanne Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 49936Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% fewer Medicare Part D claims than the average emergency medicine physician in 2024
167 Medicare Part D claims for 129 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 21 claims were for opioids.
Most prescribed
- Cefuroxime37 claims
- Ondansetron Odt22 claims
- Hydrocodone-Acetaminophen18 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 88.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Leslie Leanne Armstrong among 1,434 emergency medicine physician records in Colorado
Leslie Leanne Armstrong is one of 1,434 emergency medicine physician records with a practice address in Colorado. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 53% of them.
- NPI issued2008 · 53% of these records are older, 43% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2014 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Colorado
There are 1,434 emergency medicine physician records in Colorado.
All 1,434 in Colorado → Every provider in Longmont → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Lindsey Cesca, M.D.Longmont, CO 805011417391301
- Albert ColtonLongmont, CO 805011689657157
- Wyatt HallLongmont, CO 805011023094760
- James Hogan, MDLongmont, CO 805011912979832
- Andrew JohanosLongmont, CO 805011891771309
- Linda KeyesLongmont, CO 805011962411298
- Brian Liu, DOLongmont, CO 805011093380735
- Herbert OgdenLongmont, CO 805011790769859
Common questions
What is Leslie Leanne Armstrong's NPI number?
Leslie Leanne Armstrong's National Provider Identifier (NPI) is 1578730958, issued on May 14, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Leslie Leanne Armstrong located?
The NPPES record lists a practice address at 1950 Mountain View Ave, Longmont, CO, 80501. Phone: (303) 306-7783. Providers update this record themselves, so call before visiting.
How can I verify Leslie Leanne Armstrong's license?
NPPES lists Colorado license number 49936, 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 Leslie Leanne Armstrong prescribe under Medicare Part D?
In 2024, Leslie Leanne Armstrong had 167 Medicare Part D claims for 129 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Leslie Leanne Armstrong's MIPS final score?
The 2023 MIPS final score is 88.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.