Dr. Stephen J. Nelson, MD
- Medicare services, 2024
- 2,733
- Medicare patients, 2024
- 447
- Part D claims, 2024
- 1,931
- Publications
- 14
- Hospital affiliations
- 4
- Practice address
- 2408 Whitney Ave, Hamden, CT 06518
- Practice phone
- Call (203) 407-3500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Connecticut Orthopaedic Specialists
Hamden, Connecticut
Find Dr. Nelson's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Stephen J. Nelson is an orthopedic surgeon in Hamden, Connecticut
Dr. Nelson practices at Connecticut Orthopaedic Specialists in Hamden, Connecticut.
Dr. Nelson's NPI, 1194161604, was assigned on May 12, 2013. Dr. Nelson graduated from University of Connecticut School of Medicine in 2013. Dr. Nelson holds Connecticut license 63627.
- NPI
- 1194161604NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183936446
- NPI enumeration date
- May 12, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 407-3500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen J. Nelson practices at Connecticut Orthopaedic Specialists in Hamden, Connecticut
Dr. Nelson's primary practice is Connecticut Orthopaedic Specialists, at 2408 Whitney Ave, Hamden, CT 06518 in South Central Ct County. The practice phone is (203) 407-3500.
- Connecticut Orthopaedic Specialists2408 Whitney Ave, Hamden, CT 06518 · South Central Ct CountyPhone(203) 407-3500
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen J. Nelson is affiliated with 9 sites of care and 1 medical group
Dr. Nelson's primary practice is Connecticut Orthopaedic Specialists in Hamden, Connecticut. Dr. Nelson is also affiliated with Yale New Haven Hospital. The medical group on file is Connecticut Orthopaedics. Dmand AI also links Dr. Nelson to 3 more hospitals, 3 home health agencies and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stephen J. Nelson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nelson practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Connecticut Orthopaedic Specialists | Available with a free account |
| +8 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen J. Nelson is one of 300 orthopedic surgeons in Connecticut
Orthopaedic surgery is Dr. Nelson's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Nelson is licensed in Connecticut.
Specialties and state licenses
- Orthopaedic surgery, ConnecticutPrimary
Orthopedic surgeons near Dr. Nelson
Counts of orthopedic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Stephen J. Nelson billed Medicare for 2,733 services in 2024
CMS data shows 2,733 Medicare services from Dr. Nelson across 19 procedure codes in 2024, for 447 Medicare patients. Medicare paid $167,250 for them.
Dr. Nelson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 4782024: 1,291170%
- Imaging
- 2023: 7522024: 59121%
- Office and hospital visits
- 2023: 5442024: 5381%
- Surgery
- 2023: 2302024: 2477%
- Other services
- 2023: 02024: 66
Where Dr. Nelson's Medicare services took place, 2024
- In an office2,60095%
- In a facility1335%
Dr. Nelson compared with the Connecticut median for orthopedic surgeons, 2024
- Dr. Nelson
- Connecticut median
- Medicare services
- 2,733vs 8643.2 times
- Medicare patients
- 447vs 2072.2 times
- Part D claims
- 1,862vs 12215.3 times
Medians across 297 orthopedic surgeons in Connecticut with Dmand AI profiles that report each measure.
Dr. Nelson's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nelson and other orthopedic surgeons in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen J. Nelson treated 447 Medicare patients in 2024, average age 76
CMS counts 447 Medicare patients who saw Dr. Nelson in 2024. The largest group is 75 to 84, with 189 patients. 75% of them have arthritis, and 75% have high blood pressure. 12% are also on Medicaid. Their average risk score is 1.12, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nelson's median patient age at 71, with 60% women.
Dr. Nelson's Medicare patients by age, 2024
Dr. Nelson's Medicare patients by sex, 2024
- Women29666%
- Men15134%
Chronic conditions among Dr. Nelson's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Anxiety29%
- Mood disorders28%
- Ischemic heart disease27%
- Depression21%
- Osteoporosis21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nelson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women60%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen J. Nelson wrote 1,931 Medicare Part D claims in 2024
In 2024, Dr. Nelson wrote 1,931 Medicare Part D claims for 582 patients. 97% of them were for generic drugs. CMS names the drug for 1,862 of them, across 13 drugs with 11 or more claims each, at $11,945 in total drug cost. In 2023, CMS named 2,146 claims across 15 drugs.
Dr. Nelson's Part D claims by kind of drug, 2024
- Generic1,873 claims97%
- Brand-name58 claims3%
Dr. Nelson's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Nelson's Part D claims, 2024
- Opioids16%303 of 1,931 claims
- Antibiotics17%329 of 1,931 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,1462024: 1,86213%
Drugs named by CMS: 13 in 2024, 15 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Stephen J. Nelson ranks in the 90th percentile for knee replacement in Medicare
Dr. Nelson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 84 procedures of knee replacement by Dr. Nelson, more than 90% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Nelson ranks in Medicare procedure volume
- Knee replacement
- 90th percentile84 procedures
- Hip replacement
- 81st percentile37 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Stephen J. Nelson has 14 publications on record
Dmand AI links 14 papers to Dr. Nelson, published from 2014 to 2024. 2017 was the busiest year, with 3. The most frequent topics are Patient Readmission, Postoperative Complications and Length of Stay. Dr. Nelson has published most often in J Arthroplasty. Dr. Nelson's most frequent co-authors are Nathaniel Thomas Ondeck, MD, MHS, Patawut Bovonratwet, MD and Jonathan Cui, MD.
Dr. Nelson's papers by year, 2014 to 2024
Topics Dr. Nelson writes about most
- Patient Readmission
- Postoperative Complications
- Length of Stay
- Propensity Score
- Quality Improvement
- Ambulatory Surgical Procedures
- Inpatients
- Lumbar Vertebrae
Dr. Nelson's most frequent co-authors
- Nathaniel Thomas Ondeck, MD, MHS7 shared papers
- Patawut Bovonratwet, MD5 shared papers
- Jonathan Cui, MD3 shared papers
Recent publications by Dr. Nelson
J Arthroplasty
See who Dr. Nelson researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nelson works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Stephen J. Nelson received $5,816 in industry payments from 2019 to 2025
CMS Open Payments shows 83 general payments to Dr. Nelson from 17 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 68% of the total. Stryker Corporation paid the most, $2,815.
General payments to Dr. Nelson by program year, 2019 to 2025
General payments to Dr. Nelson by kind, 2019 to 2025
- Food and beverage$3,95968%
- Honoraria$1,50026%
- Travel and lodging$3576%
Companies that paid Dr. Nelson the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen J. Nelson graduated from University of Connecticut School of Medicine
Dr. Nelson graduated from University of Connecticut School of Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen J. Nelson's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Stephen J. Nelson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Stephen J. Nelson's NPI number?
Dr. Stephen J. Nelson's NPI number is 1194161604. It was assigned on May 12, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen J. Nelson?
Dr. Stephen J. Nelson is an orthopedic surgeon in Hamden, Connecticut. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Stephen J. Nelson practice?
Dr. Nelson practices at 2408 Whitney Ave, Hamden, CT 06518. Dr. Nelson's primary practice is Connecticut Orthopaedic Specialists in Hamden, Connecticut. Dmand AI also links Dr. Nelson to 3 hospitals, 3 home health agencies and 1 group practice or clinic.
What is Dr. Stephen J. Nelson's office phone number?
The practice phone on file for Dr. Nelson is (203) 407-3500.
What is Dr. Stephen J. Nelson's medical license number?
Dr. Nelson holds Connecticut license 63627.
Which hospitals is Dr. Stephen J. Nelson affiliated with?
Dr. Nelson is affiliated with Yale New Haven Hospital. Dmand AI links Dr. Nelson to 3 more hospitals.
What medical group is Dr. Stephen J. Nelson part of?
Dr. Nelson is linked to Connecticut Orthopaedics.
Does Dr. Stephen J. Nelson accept Medicare?
Yes. CMS data shows Dr. Nelson billed Medicare for 2,733 services in 2024, and Dr. Nelson accepts Medicare assignment.
How many Medicare patients does Dr. Stephen J. Nelson see?
CMS counts 447 Medicare patients who saw Dr. Nelson in 2024, with an average age of 76.
What services does Dr. Stephen J. Nelson bill to Medicare?
In 2024, Dr. Nelson's most billed Medicare services were injected or infused drug (J7318), injected or infused drug (J3301) and office visit, established patient (99213).
Show 6 more questionsShow fewer questions
Where did Dr. Stephen J. Nelson go to medical school?
Dr. Nelson graduated from University of Connecticut School of Medicine in 2013.
What drugs does Dr. Stephen J. Nelson prescribe most?
In 2024 Medicare Part D data, Dr. Nelson's most prescribed drugs by claims were Meloxicam, Amoxicillin and Oxycodone HCl.
Has Dr. Stephen J. Nelson received payments from drug or device companies?
CMS Open Payments shows $5,816 in general payments to Dr. Nelson from 17 companies from 2019 to 2025. The largest total came from Stryker Corporation.
How long has Dr. Stephen J. Nelson been practicing?
Dr. Nelson graduated from medical school in 2013, 13 years ago.
Does Dr. Stephen J. Nelson do research?
Dmand AI links 14 publications to Dr. Nelson, published from 2014 to 2024.
Who does Dr. Stephen J. Nelson publish with?
Dr. Nelson's most frequent co-authors are Nathaniel Thomas Ondeck, MD, MHS (7 shared papers), Patawut Bovonratwet, MD (5 shared papers) and Jonathan Cui, MD (3 shared papers).
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