2026 NPPES data Emergency Medicine Physician NPI 1578730958
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LESLIE ARMSTRONG

Emergency Medicine Physician in LONGMONT, Colorado. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
140
Medicare Part D claims · 104 beneficiaries · Emergency Medicine Physician avg: 352
MIPS score
88.614/100
▲ 6 pts above national avg 83.1 · [object Object]
What the federal data reveals: LESLIE ARMSTRONG is a Emergency Medicine Physician ([object Object]) practicing in LONGMONT, Colorado with a Medicare Part D prescribing footprint of 140 claims across 104 beneficiaries . Their CMS MIPS Final Score of 88.614/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: LESLIE ARMSTRONG reported a CMS MIPS final score of 88.614 out of 100, above the 83.1 national average, and filed 140 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

LESLIE ARMSTRONG practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

LESLIE ARMSTRONG at a glance

High performer (top quartile)

NPI registry status

Active

Issued 05/14/2008

NPI 1578730958

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

140 60% vs specialty avg

2023 prescription claims

Specialty avg: 352

MIPS final score

88.614/100 5.51400000000001% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Colorado

How Emergency Medicine Physician compares to other specialties among Colorado providers

Colorado providers

Emergency Medicine Physician share within Colorado

1. Emergency Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Emergency Medicine Physician share within Colorado

Medicare quality performance — MIPS

LESLIE ARMSTRONG's 2023 MIPS final score plotted against the Emergency Medicine Physician national average

High performer (top quartile)
MIPS Final Score
88.614/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Emergency Medicine Physician) — 88.614/100 vs national avg 83.1

0%100%National avg83%88.6%
MIPS final score (Emergency Medicine Physician) — 88.614/100 vs national avg 83.1

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

LESLIE ARMSTRONG is a Emergency Medicine Physician provider practicing in LONGMONT, Colorado, according to the CMS National Plan and Provider Enumeration System (NPPES). NPI: 1578730958. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

LESLIE ARMSTRONG appears in the CMS NPPES registry as a Emergency Medicine Physician provider at 1950 MOUNTAIN VIEW AVE, LONGMONT, CO, 80501, with a listed phone of (303) 306-7783. NPI 1578730958 was issued on 05/14/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ARMSTRONG most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 140 prescription claims written by this provider, covering 104 Medicare beneficiaries and totaling roughly $3K in drug spend, with an opioid prescribing rate of 16.4%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 88.614/100 for the 2023 performance year (Quality 86.6047), compared with the national average of 83.1.

Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

1950 MOUNTAIN VIEW AVE
LONGMONT, CO 80501

Provider Details

NPI 1578730958
Specialty Emergency Medicine Physician
Gender Female
NPI Issued 05/14/2008

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

88.614
Final Score
Avg: 83.1
86.6047
Quality

Reporting: Group practice

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

140
Total Claims
$3K
Total Drug Cost
104
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
142
Total Day Supply
1,081
Generic Drug Cost
$1K
Opioid Claims
23 (16.4% rate)
Antibiotic Claims
47

Patient Demographics

Average Patient Age
73.6 years
Avg HCC Risk Score
1.72
Gender Split
58% female / 42% male
Age Distribution
<65: 12, 65-74: 50, 75-84: 28, 85+: 14

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Ondansetron Odt
Ondansetron
24
Cefuroxime
Cefuroxime Axetil
17
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
17
Cephalexin
13

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Emergency Medicine Physician Overview

How LESLIE ARMSTRONG fits within the Emergency Medicine Physician landscape nationally.

64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider

LESLIE ARMSTRONG's 140 claims are below the specialty average of 352.

Nearby Emergency Medicine Physician Providers in Colorado

Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as ARMSTRONG.

Compare Emergency Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is LESLIE ARMSTRONG's specialty?
LESLIE ARMSTRONG specializes in Emergency Medicine Physician and practices in LONGMONT, Colorado.
How much does LESLIE ARMSTRONG prescribe under Medicare Part D?
In 2023, LESLIE ARMSTRONG wrote 140 Medicare Part D claims totaling $3K in drug costs for 104 beneficiaries.
What is LESLIE ARMSTRONG's Medicare quality score?
LESLIE ARMSTRONG has a CMS MIPS Final Score of 88.614/100 (Quality: 86.6047). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is LESLIE ARMSTRONG located?
LESLIE ARMSTRONG is located at 1950 MOUNTAIN VIEW AVE, LONGMONT, CO, 80501. Phone: (303) 306-7783.
What is LESLIE ARMSTRONG's NPI number?
LESLIE ARMSTRONG's National Provider Identifier (NPI) is 1578730958, issued on 05/14/2008.
Does LESLIE ARMSTRONG prescribe opioids?
Yes, LESLIE ARMSTRONG had 23 opioid claims in 2023 with an opioid prescribing rate of 16.4%.
How many Emergency Medicine Physician providers are there in the US?
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does LESLIE ARMSTRONG prescribe most often?
Based on 2023 Medicare Part D data, LESLIE ARMSTRONG's most frequently prescribed drugs include Ondansetron Odt, Cefuroxime, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LESLIE ARMSTRONG accept Medicare?
LESLIE ARMSTRONG appears in CMS Medicare data with 140 Part D claims and 104 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LESLIE ARMSTRONG's credentials?
LESLIE ARMSTRONG's NPI is 1578730958. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology