NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1104056654 DO
Verify on CMS → Chad Armstrong, DO
Emergency Medicine Physician in Cape Girardeau, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 66,293 in Emergency Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
232
Medicare Part D claims · 180 beneficiaries · Emergency Medicine Physician avg: 355
MIPS score
92.6/100
▲ 9 pts above national avg 83.5 · Exceptional
What the federal data shows
Chad Armstrong, DO reported a CMS MIPS final score of 92.6/100 - above the 83.5 national average - and filed 232 Medicare Part D claims in 2024.
- 92.6/100
- MIPS score · +9 vs avg
- 232
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥66th
- pct among measured MIPS (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Chad Armstrong, DO
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1104056654), first enumerated 07/18/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 232 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 92.6/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Armstrong with other Emergency Medicine Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 39 Emergency Medicine Physician providers in Cape Girardeau, MO →
Also enrolled in Missouri
- Dr. Robert Abbott, M.D. Saint Charles, MO
- Dr. Nagla Abdelmalek, M.D. Saint Louis, MO
- Dr. Donald Ables, MD Kansas City, MO
- Dr. Enyo Ablordeppey, MD Saint Louis, MO
- Dr. Allison Abma, DO Branson, MO
- Dr. Sean Abraham, D.O. Columbia, MO
Other specialties in Cape Girardeau: Family Nurse Practitioner (151) · Behavior Technician (114) · Professional Counselor (108) · Speech-Language Pathologist (69)
CMS NPPES provider registry desk
NPI 1104056654 · Emergency Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · MIPS-ABOVE · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1104056654
- ENUM-MID 2009
- TAX-MEGA 66K Emergency Medicine
- MIPS-ABOVE 92.6/100
- RX-LIGHT 232
- BOOK-LIGHT 1,352 in Missouri
- PHOTO-FINISH Ralph Hoover, M.D. · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Peter Buffa, M.D…
Peter Buffa, M.D., PA
92.5 MIPS pts
- Armstrong · this…
Armstrong · this provider
92.6 MIPS pts
- Ralph Hoover, M.…
Ralph Hoover, M.D.
92.6 MIPS pts
- Allana Rodriguez…
Allana Rodriguez, MD
92.6 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Chad Armstrong, DO's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
93 ≥ 66th percentile 66% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Chad Armstrong, DO sits
This provider among emergency medicine physician peers
Across the 14,017 emergency medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Chad Armstrong, DO writes more Part D claims than 69% of them and scores higher on MIPS quality than 60% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one emergency medicine physician peer from a representative sample of 60; the gold marker is Chad Armstrong, DO. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Chad Armstrong, DO 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).
What does the federal data show about Chad Armstrong, DO?
High performer (top quartile)Primary specialty
Emergency Medicine Physician
Medicare Part D claims
232 35% vs specialty avg
MIPS final score
92.6/100 9.1 pts vs avg
Specialty distribution in Missouri
How Emergency Medicine Physician compares to other specialties among Missouri providers
Medicare quality performance, MIPS
Chad Armstrong, DO's 2023 MIPS final score plotted against the Emergency Medicine Physician national average
- MIPS Final Score
- 92.6/100
- vs 83.5 national avg · 2023 performance year
How MIPS and board certification work
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).
Practice Address
Provider Details
| NPI | 1104056654 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 07/18/2009 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
92.5751
Final Score
Measured-score avg: 83.5
85.0323
Quality
88
Promoting Interoperability
Reporting: Alternative Payment Model
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
232
Total Claims
$9K
Total Drug Cost
180
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 234.133
- Total Day Supply
- 2,088
- Generic Drug Cost
- $2K
- Opioid Claims
- 54 (23.3% rate)
- Antibiotic Claims
- 80
Patient Demographics
- Average Patient Age
- 69.2 years
- Avg HCC Risk Score
- 2.06
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 48, 65-74: 67, 75-84: 45, 85+: 20
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Chad Armstrong, DO prescribes most
Top Medicare Part D drugs by claim count, 2024
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
47 claims
- Ondansetron Odt
Ondansetron Odt
23 claims
- Cephalexin 18
Cephalexin
18 claims
- Clindamycin Hcl 18
Clindamycin Hcl
18 claims
- Furosemide 12
Furosemide
12 claims
- Azithromycin 11
Azithromycin
11 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 47 |
| Ondansetron Odt Ondansetron | 23 |
| Cephalexin | 18 |
| Clindamycin Hcl | 18 |
| Furosemide | 12 |
| Azithromycin | 11 |
* 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 Chad Armstrong, DO fits within the Emergency Medicine Physician landscape nationally.
66,293
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
355
Avg Claims per Provider
Chad Armstrong, DO's 232 claims are below the specialty average of 355.
Nationwide Emergency Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Armstrong, both outside Missouri so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (92.6 here).
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Emergency Medicine Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Armstrong.
One of 1,352 Emergency Medicine Physician providers enrolled in Missouri, 11 are shown on this page.
Dr. Lajon Addison
D.O.
Columbia, MO
Dr. Opeolu Adeoye
MD
Saint Louis, MO
Dr. Lukuman Afuwape
M.D
Kansas City, MO
Dr. Faqir Ahmad
MD
Saint Louis, MO
Dr. Salma Ahmad
MD
Saint Louis, MO
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Chad Armstrong, DO's specialty? ▼
Chad Armstrong, DO specializes in Emergency Medicine Physician and practices in Cape Girardeau, Missouri. Credentials: DO.
How much does Chad Armstrong, DO prescribe under Medicare Part D? ▼
In 2024, Chad Armstrong, DO wrote 232 Medicare Part D claims totaling $9K in drug costs for 180 beneficiaries.
What is Chad Armstrong, DO's Medicare quality score? ▼
Chad Armstrong, DO has a CMS MIPS Final Score of 92.6/100 (Quality: 85). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Chad Armstrong, DO located? ▼
Chad Armstrong, DO is located at 211 SAINT FRANCIS DR, Cape Girardeau, MO, 63703. Phone: (573) 331-5110.
What is Chad Armstrong, DO's NPI number? ▼
Chad Armstrong, DO's National Provider Identifier (NPI) is 1104056654, issued on 07/18/2009.
Does Chad Armstrong, DO prescribe opioids? ▼
Yes, Chad Armstrong, DO had 54 opioid claims in 2024 with an opioid prescribing rate of 23.3%.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 66,293 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 355 Medicare Part D claims per year.
What drugs does Chad Armstrong, DO prescribe most often? ▼
Based on 2024 Medicare Part D data, Chad Armstrong, DO's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Ondansetron Odt, Cephalexin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Chad Armstrong, DO accept Medicare? ▼
Chad Armstrong, DO appears in CMS Medicare data with 232 Part D claims and 180 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Chad Armstrong, DO's credentials? ▼
Chad Armstrong, DO's NPI is 1104056654 with credentials DO. 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
View source datasets and methodology notes
- 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 (2024). 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 August 2026 (NPPES) / 2024 (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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.