Dr. Carl W. Nissen, MD
- Medicare services, 2024
- 12
- Medicare patients, 2024
- 26
- Part D claims, 2024
- 54
- MIPS score, 2024
- 93
- Hospital affiliations
- 2
- Practice address
- 80 Seymour Street, Hartford, CT 06102
- Practice phone
- Call (860) 545-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Nissen's professional email, personal email and mobile number
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Dr. Carl W. Nissen is an orthopedic surgeon in Hartford, Connecticut
Dr. Nissen practices at Hartford Hospital in Hartford, Connecticut, part of Hartford HealthCare.
Dr. Nissen's NPI, 1982601530, was assigned on June 28, 2005. Dr. Nissen graduated from University of Connecticut School of Medicine in 1990. Dr. Nissen holds Connecticut license 033613.
- NPI
- 1982601530NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8729093505
- NPI enumeration date
- June 28, 2005
- NPI status
- Active
- Practice phone
- (860) 545-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Carl W. Nissen practices at Hartford Hospital in Hartford, Connecticut
Dr. Nissen's primary practice is Hartford Hospital, at 80 Seymour Street, Hartford, CT 06102 in Hartford County. The practice phone is (860) 545-5000.
- Hartford Hospital80 Seymour Street, Hartford, CT 06102 · Hartford CountyPhone(860) 545-5000
Source: Dmand AI Affiliation Data
Dr. Carl W. Nissen is affiliated with 4 sites of care and 1 medical group
Dr. Nissen's primary practice is Hartford Hospital in Hartford, Connecticut, part of Hartford HealthCare. The medical group on file is Hartford Hospital. Dmand AI also links Dr. Nissen to 1 more hospital, 1 physician office and 1 group practice or clinic, each named with a free account. Dr. Nissen's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Carl W. Nissen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nissen practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hartford Hospital | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Carl W. Nissen is one of 300 orthopedic surgeons in Connecticut
Orthopaedic surgery is Dr. Nissen's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Nissen is licensed in Connecticut.
Specialties and state licenses
- Orthopaedic surgery, ConnecticutPrimary
Orthopedic surgeons near Dr. Nissen
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. Carl W. Nissen billed Medicare for 12 services in 2024
CMS data shows 12 Medicare services from Dr. Nissen across 1 procedure code in 2024, all of them office visits, for 26 Medicare patients. Medicare paid $1,057 for them. Every service was in an office.
Dr. Nissen compared with the Connecticut median for orthopedic surgeons, 2024
- Dr. Nissen
- Connecticut median
- Medicare services
- 12vs 86499% below
- Medicare patients
- 26vs 20787% below
- Part D claims
- 34vs 12272% below
Medians across 297 orthopedic surgeons in Connecticut with Dmand AI profiles that report each measure.
Dr. Nissen'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. Nissen and other orthopedic surgeons in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Carl W. Nissen treated 26 Medicare patients in 2024, average age 72
CMS counts 26 Medicare patients who saw Dr. Nissen in 2024. The largest group is 65 to 74, with 12 patients. 73% of them have high cholesterol, and 65% have high blood pressure. Their average risk score is 0.82, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nissen's median patient age at 41, with 52% women.
Dr. Nissen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Nissen's Medicare patients by sex, 2024
- Women1558%
- Men1142%
Chronic conditions among Dr. Nissen's Medicare patients, 2024
- High cholesterol73%
- High blood pressure65%
- Arthritis58%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nissen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 41
Patient panel by sex, all payers
- Women52%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Carl W. Nissen wrote 54 Medicare Part D claims in 2024
In 2024, Dr. Nissen wrote 54 Medicare Part D claims for 21 patients. 94% of them were for generic drugs. CMS names the drug for 34 of them, across 2 drugs with 11 or more claims each, at $399 in total drug cost.
Dr. Nissen's Part D claims by kind of drug, 2024
- Generic51 claims94%
- Brand-name and other3 claims6%
Dr. Nissen'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.
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. Carl W. Nissen scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Nissen for performance year 2024, reported as part of a group.
Dr. Nissen's MIPS scores, performance year 2024
- 93of 100Final score
- 75.4of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 71of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Lower limb (leg) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Carl W. Nissen received $153 in industry payments from 2024 to 2025
CMS Open Payments shows 2 general payments to Dr. Nissen from 1 drug or device company from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Vericel Corporation paid the most, $153.
General payments to Dr. Nissen by program year, 2024 to 2025
Companies that paid Dr. Nissen the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Carl W. Nissen graduated from University of Connecticut School of Medicine
Dr. Nissen graduated from University of Connecticut School of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Carl W. Nissen'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 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 | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| 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. Carl W. Nissen
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. Carl W. Nissen's NPI number?
Dr. Carl W. Nissen's NPI number is 1982601530. It was assigned on June 28, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Carl W. Nissen?
Dr. Carl W. Nissen is an orthopedic surgeon in Hartford, Connecticut. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Carl W. Nissen practice?
Dr. Nissen practices at 80 Seymour Street, Hartford, CT 06102. Dr. Nissen's primary practice is Hartford Hospital in Hartford, Connecticut, part of Hartford HealthCare. Dmand AI also links Dr. Nissen to 1 hospital, 1 physician office and 1 group practice or clinic.
What is Dr. Carl W. Nissen's office phone number?
The practice phone on file for Dr. Nissen is (860) 545-5000.
What is Dr. Carl W. Nissen's medical license number?
Dr. Nissen holds Connecticut license 033613.
Which hospitals is Dr. Carl W. Nissen affiliated with?
Dr. Nissen practices at Hartford Hospital in Hartford, Connecticut. Dmand AI links Dr. Nissen to 1 more hospital.
What medical group is Dr. Carl W. Nissen part of?
Dr. Nissen is linked to Hartford Hospital.
Does Dr. Carl W. Nissen accept Medicare?
Yes. CMS data shows Dr. Nissen billed Medicare for 12 services in 2024.
What is Dr. Carl W. Nissen's MIPS score?
Dr. Nissen's MIPS final score for performance year 2024 is 93 out of 100, reported as part of a group.
How many Medicare patients does Dr. Carl W. Nissen see?
CMS counts 26 Medicare patients who saw Dr. Nissen in 2024, with an average age of 72.
Show 5 more questionsShow fewer questions
What services does Dr. Carl W. Nissen bill to Medicare?
In 2024, Dr. Nissen's most billed Medicare services were office visit, new patient (99203).
Where did Dr. Carl W. Nissen go to medical school?
Dr. Nissen graduated from University of Connecticut School of Medicine in 1990.
What drugs does Dr. Carl W. Nissen prescribe most?
In 2024 Medicare Part D data, Dr. Nissen's most prescribed drugs by claims were Ibuprofen and Diclofenac Sodium.
Has Dr. Carl W. Nissen received payments from drug or device companies?
CMS Open Payments shows $153 in general payments to Dr. Nissen from 1 company from 2024 to 2025. The largest total came from Vericel Corporation.
How long has Dr. Carl W. Nissen been practicing?
Dr. Nissen graduated from medical school in 1990, 36 years ago.
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