NPI registry status
Active
2026 NPPES data Pediatric Orthopaedic Surgery Physician NPI 1982601530 MD
Verify on CMS → Carl Nissen, MD
Pediatric Orthopaedic Surgery Physician in Hartford, 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 615 in Pediatric Orthopaedic Surgery 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
60
Medicare Part D claims · 26 beneficiaries · Pediatric Orthopaedic Surgery Physician avg: 128
MIPS score
86.4/100
▲ 3 pts above national avg 83.1 · Above neutral
Industry payments
$124.99
1 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Carl Nissen, MD reported a CMS MIPS final score of 86.4/100 - above the 83.1 national average - and filed 60 Medicare Part D claims in 2023.
- 86.4/100
- MIPS score · +3 vs avg
- 60
- 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.
Carl Nissen, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
86 Top 48% higher than 52% of 477,587 scored providers
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
Where Carl Nissen, MD sits
This provider among pediatric orthopaedic surgery physician peers
Across the 37 pediatric orthopaedic surgery physician providers who report both Medicare Part D prescribing and a MIPS quality score, Carl Nissen, MD writes more Part D claims than 43% of them and scores higher on MIPS quality than 54% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one pediatric orthopaedic surgery physician peer from a representative sample of 36; the gold marker is Carl Nissen, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Carl Nissen, 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 Carl Nissen, MD?
High performer (top quartile)Primary specialty
Pediatric Orthopaedic Surgery Physician
Medicare Part D claims
60 53% vs specialty avg
MIPS final score
86.4/100 3.3 pts vs avg
Specialty distribution in Connecticut
How Pediatric Orthopaedic Surgery Physician compares to other specialties among Connecticut providers
Medicare quality performance, MIPS
Carl Nissen, MD's 2023 MIPS final score plotted against the Pediatric Orthopaedic Surgery Physician national average
- MIPS Final Score
- 86.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Pediatric Orthopaedic Surgery Physician) - 86.4/100 vs national avg 83.1
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).
Carl Nissen, MD appears in the CMS NPPES registry as a Pediatric Orthopaedic Surgery Physician provider holding MD credentials at 31 SEYMOUR ST STE 204, Hartford, CT, 06106, with a listed phone of (860) 421-3233. NPI 1982601530 was issued on 06/28/2005.
Medicare Part D records for calendar year 2023 show 60 prescription claims written by this provider, covering 26 Medicare beneficiaries and totaling roughly $3K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 86.4/100 for the 2023 performance year (Quality 82, Cost 43), compared with the national average of 83.1.
Pediatric Orthopaedic Surgery Physician is a narrow specialty nationwide, with 615 enrolled providers across 49 states and an average of 128 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
Provider Details
| NPI | 1982601530 |
|---|---|
| Specialty | Pediatric Orthopaedic Surgery Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/28/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
86.4127
Final Score
Avg: 83.1
81.9936
Quality
43.0396
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Carl Nissen, 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.
Hartford Hospital
★★★★☆ 4/5
Hartford, CT
Acute Care Hospitals
CMS CCN: 070025
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 Carl Nissen, MD. Source: openpaymentsdata.cms.gov.
Total received
$125
Largest payer
Vericel Corporation
Most common payment type
Food and Beverage
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 2023.
60
Total Claims
$3K
Total Drug Cost
26
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 64
- Total Day Supply
- 1,570
- Generic Drug Cost
- $667
Patient Demographics
- Average Patient Age
- 67.4 years
- Avg HCC Risk Score
- 1.01
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Ibuprofen | 28 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Pediatric Orthopaedic Surgery Physician in CT →
All providers in Connecticut →
Compare specialties →
Pediatric Orthopaedic Surgery Physician Overview
How Carl Nissen, MD fits within the Pediatric Orthopaedic Surgery Physician landscape nationally.
615
Pediatric Orthopaedic Surgery Physician Providers in US
49
States with Pediatric Orthopaedic Surgery Physician
128
Avg Claims per Provider
Carl Nissen, MD's 60 claims are below the specialty average of 128.
Nearby Pediatric Orthopaedic Surgery Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Nissen.
Dr. Sonia Chaudhry
M.D.
Hartford, CT
Dr. Peter Deluca
M.D.
Branford, CT
Dr. Mark Lee
M.D.
Hartford, CT
Dr. Brian Smith
MD
Hartford, CT
Dr. Rachael Staub
MS, PA-C
Waterbury, CT
Compare Pediatric Orthopaedic Surgery Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Connecticut medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pediatric Orthopaedic Surgery Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Carl Nissen, MD's specialty? ▼
Carl Nissen, MD specializes in Pediatric Orthopaedic Surgery Physician and practices in Hartford, Connecticut. Credentials: MD.
How much does Carl Nissen, MD prescribe under Medicare Part D? ▼
In 2023, Carl Nissen, MD wrote 60 Medicare Part D claims totaling $3K in drug costs for 26 beneficiaries.
What is Carl Nissen, MD's Medicare quality score? ▼
Carl Nissen, MD has a CMS MIPS Final Score of 86.4/100 (Quality: 82, Cost: 43). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Carl Nissen, MD located? ▼
Carl Nissen, MD is located at 31 SEYMOUR ST STE 204, Hartford, CT, 06106. Phone: (860) 421-3233.
What is Carl Nissen, MD's NPI number? ▼
Carl Nissen, MD's National Provider Identifier (NPI) is 1982601530, issued on 06/28/2005.
How many Pediatric Orthopaedic Surgery Physician providers are there in the US? ▼
There are 615 Pediatric Orthopaedic Surgery Physician providers across 49 states in the US. The average Pediatric Orthopaedic Surgery Physician provider writes 128 Medicare Part D claims per year.
What drugs does Carl Nissen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Carl Nissen, MD's most frequently prescribed drugs include Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Carl Nissen, MD accept Medicare? ▼
Carl Nissen, MD appears in CMS Medicare data with 60 Part D claims and 26 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Carl Nissen, MD's credentials? ▼
Carl Nissen, MD's NPI is 1982601530 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
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 (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
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 May 2026.