Dr. Alexander Roman Nelson, MD
- Medicare services, 2024
- 247
- Medicare patients, 2024
- 243
- Part D claims, 2024
- 24
- Publications
- 7
- MIPS score, 2024
- 87
- Practice address
- 20 York Street, New Haven, CT 06510
- Practice phone
- Call (203) 688-5900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Yale New Haven Psychiatric Hospital (York St)
Psychiatric Inpatient Facility · New Haven, 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. Alexander Roman Nelson is an emergency medicine physician in New Haven, Connecticut
Dr. Nelson practices at Yale New Haven Psychiatric Hospital (York St) in New Haven, Connecticut.
Dr. Nelson's NPI, 1326543372, was assigned on March 29, 2018. Dr. Nelson graduated from Florida International Univ, College of Medicine in 2018. Dr. Nelson holds Connecticut license 7042.
- NPI
- 1326543372NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820345333
- NPI enumeration date
- March 29, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 688-5900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alexander Roman Nelson practices at Yale New Haven Psychiatric Hospital (York St) in New Haven, Connecticut
Dr. Nelson's primary practice is Yale New Haven Psychiatric Hospital (York St), at 20 York Street, New Haven, CT 06510. The practice phone is (203) 688-5900.
- Yale New Haven Psychiatric Hospital (York St)20 York Street, New Haven, CT 06510Phone(203) 688-5900
Source: Dmand AI Affiliation Data
Dr. Alexander Roman Nelson is affiliated with 2 sites of care and 1 medical group
Dr. Nelson's primary practice is Yale New Haven Psychiatric Hospital (York St) in New Haven, Connecticut. Dr. Nelson is also affiliated with Yale New Haven Hospital. The medical group on file is Yale Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alexander Roman Nelson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nelson practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Yale New Haven Psychiatric Hospital (York St) | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alexander Roman Nelson is one of 683 emergency medicine physicians in Connecticut
Emergency medicine is Dr. Nelson's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Nelson is licensed in Connecticut.
Specialties and state licenses
- Emergency medicine, ConnecticutPrimary
Emergency medicine physicians near Dr. Nelson
Counts of emergency medicine physicians 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. Alexander Roman Nelson billed Medicare for 247 services in 2024
CMS data shows 247 Medicare services from Dr. Nelson across 4 procedure codes in 2024, for 243 Medicare patients. Medicare paid $30,964 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Nelson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3062024: 22626%
- Tests and treatments
- 2023: 222024: 215%
Dr. Nelson compared with the Connecticut median for emergency medicine physicians, 2024
- Dr. Nelson
- Connecticut median
- Medicare services
- 247vs 243Close to median
- Medicare patients
- 243vs 250Close to median
Medians across 695 emergency medicine physicians 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.
Need commercial claims for Dr. Nelson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nelson and other emergency medicine physicians in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alexander Roman Nelson treated 243 Medicare patients in 2024, average age 74
CMS counts 243 Medicare patients who saw Dr. Nelson in 2024. The largest group is 65 to 74, with 74 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 40% are also on Medicaid. Their average risk score is 2.30, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Nelson's median patient age at 72, with 60% women.
Dr. Nelson's Medicare patients by age, 2024
Dr. Nelson's Medicare patients by sex, 2024
- Women12451%
- Men11949%
Chronic conditions among Dr. Nelson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Anxiety52%
- Mood disorders51%
- Depression42%
- Diabetes42%
- Ischemic heart disease42%
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 72
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alexander Roman Nelson wrote 24 Medicare Part D claims in 2024
In 2024, Dr. Nelson wrote 24 Medicare Part D claims for 23 patients. 79% of them were for generic drugs.
Dr. Nelson's Part D claims by kind of drug, 2024
- Generic19 claims79%
- Brand-name and other5 claims21%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Alexander Roman Nelson scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Nelson for performance year 2024, reported as part of a group. Dr. Nelson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Nelson's MIPS scores, performance year 2024
- 87of 100Final score
- 77.4of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 74of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Alexander Roman Nelson has 7 publications on record
Dmand AI links 7 papers to Dr. Nelson, published from 2021 to 2025. 2022 was the busiest year, with 2. The most frequent topics are Emergency Medical Services and COVID-19. Dr. Nelson has published most often in Prehosp Emerg Care. Dr. Nelson's most frequent co-authors are Kevin D. Burns, MD, Mark Kantrowitz Rollins, DO and Matthew Shapiro, MD.
Dr. Nelson's papers by year, 2021 to 2025
Topics Dr. Nelson writes about most
- Emergency Medical Services
- COVID-19
Dr. Nelson's most frequent co-authors
- Kevin D. Burns, MD3 shared papers
- Mark Kantrowitz Rollins, DO3 shared papers
- Matthew Shapiro, MD3 shared papers
Recent publications by Dr. Nelson
Acad Emerg Med
Prehosp Emerg Care
Prehosp Emerg Care
Prehosp Emerg Care
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 emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Alexander Roman Nelson received $125 in industry payments in 2022
CMS Open Payments shows 1 general payment to Dr. Nelson from 1 drug or device company in 2022. Food and beverage make up the largest share, 100% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $125.
Companies that paid Dr. Nelson the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Alexander Roman Nelson graduated from Florida International Univ, College of Medicine
Dr. Nelson graduated from Florida International Univ, College of Medicine in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Alexander Roman 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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 (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)Clinician Public Reporting: Overall MIPS Performance (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. Alexander Roman 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. Alexander Roman Nelson's NPI number?
Dr. Alexander Roman Nelson's NPI number is 1326543372. It was assigned on March 29, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Alexander Roman Nelson?
Dr. Alexander Roman Nelson is an emergency medicine physician in New Haven, Connecticut. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Alexander Roman Nelson practice?
Dr. Nelson practices at 20 York Street, New Haven, CT 06510. Dr. Nelson's primary practice is Yale New Haven Psychiatric Hospital (York St) in New Haven, Connecticut.
What is Dr. Alexander Roman Nelson's office phone number?
The practice phone on file for Dr. Nelson is (203) 688-5900.
What is Dr. Alexander Roman Nelson's medical license number?
Dr. Nelson holds Connecticut license 7042.
Which hospitals is Dr. Alexander Roman Nelson affiliated with?
Dr. Nelson is affiliated with Yale New Haven Hospital.
What medical group is Dr. Alexander Roman Nelson part of?
Dr. Nelson is linked to Yale Health.
Does Dr. Alexander Roman Nelson accept Medicare?
Yes. CMS data shows Dr. Nelson billed Medicare for 247 services in 2024, and Dr. Nelson accepts Medicare assignment.
What is Dr. Alexander Roman Nelson's MIPS score?
Dr. Nelson's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
How many Medicare patients does Dr. Alexander Roman Nelson see?
CMS counts 243 Medicare patients who saw Dr. Nelson in 2024, with an average age of 74.
Show 6 more questionsShow fewer questions
What services does Dr. Alexander Roman Nelson bill to Medicare?
In 2024, Dr. Nelson's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and heart test or procedure (93308).
Where did Dr. Alexander Roman Nelson go to medical school?
Dr. Nelson graduated from Florida International Univ, College of Medicine in 2018.
Has Dr. Alexander Roman Nelson received payments from drug or device companies?
CMS Open Payments shows $125 in general payments to Dr. Nelson from 1 company from 2022 to 2022. The largest total came from Boehringer Ingelheim Pharmaceuticals, Inc.
How long has Dr. Alexander Roman Nelson been practicing?
Dr. Nelson graduated from medical school in 2018, 8 years ago.
Does Dr. Alexander Roman Nelson do research?
Dmand AI links 7 publications to Dr. Nelson, published from 2021 to 2025.
Who does Dr. Alexander Roman Nelson publish with?
Dr. Nelson's most frequent co-authors are Kevin D. Burns, MD (3 shared papers), Mark Kantrowitz Rollins, DO (3 shared papers) and Matthew Shapiro, MD (3 shared papers).
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