2026 NPPES data Emergency Medicine Physician NPI 1225529340 MD
Verify on CMS →

ALEXANDER DAYTON, MD

Emergency Medicine Physician in NORWICH, Connecticut. 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
435
Medicare Part D claims · 270 beneficiaries · Emergency Medicine Physician avg: 352
MIPS score
92.2292/100
▲ 9 pts above national avg 83.1 · [object Object]

What the federal data shows

ALEXANDER DAYTON, MD reported a CMS MIPS final score of 92.2292/100 — above the 83.1 national average — and filed 435 Medicare Part D claims in 2023.

92.2292/100
MIPS score · +9 vs avg
435
Part D claims, 2023
Likely
board-certified (heuristic)

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.

ALEXANDER DAYTON, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

92 Top 32% higher than 68% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored 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.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

ALEXANDER DAYTON, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — 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 ALEXANDER DAYTON, MD?

High performer (top quartile)

NPI registry status

Active

Issued 05/24/2018

NPI 1225529340

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

435 24% vs specialty avg

2023 prescription claims

Specialty avg: 352

MIPS final score

92.2292/100 9.129200000000012% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Connecticut

How Emergency Medicine Physician compares to other specialties among Connecticut providers

Connecticut providers

Emergency Medicine Physician share within Connecticut

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

Medicare quality performance — MIPS

ALEXANDER DAYTON, MD's 2023 MIPS final score plotted against the Emergency Medicine Physician national average

High performer (top quartile)
MIPS Final Score
92.2292/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Emergency Medicine Physician) — 92.2292/100 vs national avg 83.1

0%100%National avg83%92.2%
MIPS final score (Emergency Medicine Physician) — 92.2292/100 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).

ALEXANDER DAYTON, MD appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding MD credentials at 326 WASHINGTON ST, NORWICH, CT, 06360, with a listed phone of (860) 889-8331. NPI 1225529340 was issued on 05/24/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DAYTON 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 435 prescription claims written by this provider, covering 270 Medicare beneficiaries and totaling roughly $8K in drug spend, with an opioid prescribing rate of 7.8%. 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 92.2292/100 for the 2023 performance year (Quality 92.153, Cost 58.8274), 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

326 WASHINGTON ST
NORWICH, CT 06360

Provider Details

NPI 1225529340
Specialty Emergency Medicine Physician
Credentials MD
Gender Male
NPI Issued 05/24/2018

CMS Quality Score (MIPS)

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

92.2292
Final Score
Avg: 83.1
92.153
Quality
58.8274
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where ALEXANDER DAYTON, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

THE WILLIAM W BACKUS HOSPITAL
NORWICH, CT

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Medicare Part D Prescribing Data

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

435
Total Claims
$8K
Total Drug Cost
270
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
440
Total Day Supply
4,467
Generic Drug Cost
$5K
Opioid Claims
34 (7.8% rate)
Antibiotic Claims
111

Patient Demographics

Average Patient Age
69.2 years
Avg HCC Risk Score
1.82
Gender Split
59% female / 41% male
Age Distribution
<65: 75, 65-74: 94, 75-84: 72, 85+: 29

Top Prescribed Drugs (Medicare Part D)

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

What ALEXANDER DAYTON, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Ondansetron Odt
Ondansetron
39
Prednisone
39
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
37
Famotidine
32
Oxycodone Hcl
31
Sucralfate
29
Ibuprofen
26
Cefpodoxime Proxetil
25
Doxycycline Hyclate
17
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 ALEXANDER DAYTON, MD 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

ALEXANDER DAYTON, MD's 435 claims are above the specialty average of 352.

Nearby Emergency Medicine Physician Providers in Connecticut

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

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

Frequently Asked Questions

What is ALEXANDER DAYTON, MD's specialty?
ALEXANDER DAYTON, MD specializes in Emergency Medicine Physician and practices in NORWICH, Connecticut. Credentials: MD.
How much does ALEXANDER DAYTON, MD prescribe under Medicare Part D?
In 2023, ALEXANDER DAYTON, MD wrote 435 Medicare Part D claims totaling $8K in drug costs for 270 beneficiaries.
What is ALEXANDER DAYTON, MD's Medicare quality score?
ALEXANDER DAYTON, MD has a CMS MIPS Final Score of 92.2292/100 (Quality: 92.153, Cost: 58.8274). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is ALEXANDER DAYTON, MD located?
ALEXANDER DAYTON, MD is located at 326 WASHINGTON ST, NORWICH, CT, 06360. Phone: (860) 889-8331.
What is ALEXANDER DAYTON, MD's NPI number?
ALEXANDER DAYTON, MD's National Provider Identifier (NPI) is 1225529340, issued on 05/24/2018.
Does ALEXANDER DAYTON, MD prescribe opioids?
Yes, ALEXANDER DAYTON, MD had 34 opioid claims in 2023 with an opioid prescribing rate of 7.8%.
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 ALEXANDER DAYTON, MD prescribe most often?
Based on 2023 Medicare Part D data, ALEXANDER DAYTON, MD's most frequently prescribed drugs include Ondansetron Odt, Prednisone, Amoxicillin-Clavulanate Potass. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ALEXANDER DAYTON, MD accept Medicare?
ALEXANDER DAYTON, MD appears in CMS Medicare data with 435 Part D claims and 270 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ALEXANDER DAYTON, MD's credentials?
ALEXANDER DAYTON, MD's NPI is 1225529340 with credentials MD. 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