NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1558504258 D.O.
Verify on CMS → Stephen Kelly, D.O.
Emergency Medicine Physician in Derby, Connecticut.
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
950
Medicare Part D claims · 546 beneficiaries · Emergency Medicine Physician avg: 355
Industry payments
$20
1 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Stephen Kelly, D.O. filed 950 Medicare Part D claims in 2024 as an Emergency Medicine Physician in Derby, Connecticut.
- 950
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥74th
- pct by Part D claim volume (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 Stephen Kelly, D.O.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1558504258), first enumerated 04/09/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 950 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- 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.
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$20 in reported industry payments (1 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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.
CMS NPPES provider registry desk
NPI 1558504258 · Emergency Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1558504258
- ENUM-MID 2009
- TAX-MEGA 66K Emergency Medicine
- RX-LIGHT 950
- BOOK-LIGHT 761 in Connecticut
- PHOTO-ENUM Eddie Turner, MD · 2009
Stephen Kelly, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
950 ≥ 74th percentile 74% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. 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 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Stephen Kelly, D.O. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Stephen Kelly, D.O.?
Quality data not reportedPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
950 168% vs specialty avg
Specialty distribution in Connecticut
How Emergency Medicine Physician compares to other specialties among Connecticut providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Emergency Medicine Physician. Verify directly:
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 | 1558504258 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 04/09/2009 |
Hospital and facility affiliations
Facilities where Stephen Kelly, D.O. 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.
Rpm Care Coordination PC
Newburyport, MA
Stationmd Professional Corporation
Staatsburg, NY
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Stephen Kelly, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$20
Largest payer
CSL Behring
Most common payment type
Education
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
950
Total Claims
$82K
Total Drug Cost
546
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,290.633
- Total Day Supply
- 27,323
- Generic Drug Cost
- $33K
- Antibiotic Claims
- 174
Patient Demographics
- Average Patient Age
- 58.0 years
- Avg HCC Risk Score
- 1.47
- Gender Split
- 55% female / 45% male
- Age Distribution
- <65: 335, 65-74: 145, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Stephen Kelly, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Prednisone
Prednisone
47 claims
- Clotrimazole
Clotrimazole
42 claims
- Ibuprofen
Ibuprofen
38 claims
- Erythromycin
Erythromycin
36 claims
- Ondansetron Odt
Ondansetron Odt
36 claims
- Cephalexin
Cephalexin
33 claims
- Cefdinir
Cefdinir
23 claims
- Azithromycin
Azithromycin
22 claims
| Drug | Claims |
|---|---|
| Prednisone | 47 |
| Clotrimazole | 42 |
| Ibuprofen | 38 |
| Erythromycin Erythromycin Base | 36 |
| Ondansetron Odt Ondansetron | 36 |
| Cephalexin | 33 |
| Cefdinir | 23 |
| Azithromycin | 22 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 21 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 19 |
* 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 Stephen Kelly, D.O. 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
Stephen Kelly, D.O.'s 950 claims are above the specialty average of 355.
Nationwide Emergency Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Kelly, both outside Connecticut so the neighborhoods are not geographic containment.
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 Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Kelly.
One of 761 Emergency Medicine Physician providers enrolled in Connecticut, 5 are shown here.
Dr. Carol Abbatiello
D.O.
Hartford, CT
Dr. Lincoln Abbott
MD
Hartford, CT
Dr. Wayne Abrahams
MD
Waterbury, CT
Dr. Theresa Adams
M.D.
New London, CT
Dr. Doreen Agboh
MD
New Haven, CT
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Stephen Kelly, D.O.'s specialty? ▼
Stephen Kelly, D.O. specializes in Emergency Medicine Physician and practices in Derby, Connecticut. Credentials: D.O..
How much does Stephen Kelly, D.O. prescribe under Medicare Part D? ▼
In 2024, Stephen Kelly, D.O. wrote 950 Medicare Part D claims totaling $82K in drug costs for 546 beneficiaries.
Where is Stephen Kelly, D.O. located? ▼
Stephen Kelly, D.O. is located at 130 DIVISION ST, Derby, CT, 06418. Phone: (203) 735-7421.
What is Stephen Kelly, D.O.'s NPI number? ▼
Stephen Kelly, D.O.'s National Provider Identifier (NPI) is 1558504258, issued on 04/09/2009.
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 Stephen Kelly, D.O. prescribe most often? ▼
Based on 2024 Medicare Part D data, Stephen Kelly, D.O.'s most frequently prescribed drugs include Prednisone, Clotrimazole, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stephen Kelly, D.O. accept Medicare? ▼
Stephen Kelly, D.O. appears in CMS Medicare data with 950 Part D claims and 546 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stephen Kelly, D.O.'s credentials? ▼
Stephen Kelly, D.O.'s NPI is 1558504258 with credentials D.O.. 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.
- 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.