NPI registry status
Active
2026 NPPES data Surgical Oncology Physician NPI 1699116582 MS, PA-C
Verify on CMS → Chelsea Semrau, MS, PA-C
Surgical Oncology 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 1,410 in Surgical Oncology 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
685
Medicare Part D claims · 174 beneficiaries · Surgical Oncology Physician avg: 97
MIPS score
91.3/100
▲ 8 pts above national avg 83.1 · Exceptional
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Chelsea Semrau, MS, PA-C reported a CMS MIPS final score of 91.3/100 - above the 83.1 national average - and filed 685 Medicare Part D claims in 2023.
- 91.3/100
- MIPS score · +8 vs avg
- 685
- 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.
Chelsea Semrau, MS, PA-C's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
91 Top 37% higher than 63% 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 Chelsea Semrau, MS, PA-C sits
This provider among surgical oncology physician peers
Across the 416 surgical oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Chelsea Semrau, MS, PA-C writes more Part D claims than 98% of them and scores higher on MIPS quality than 64% - placing this provider in the high-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 surgical oncology physician peer from a representative sample of 60; the gold marker is Chelsea Semrau, MS, PA-C. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Chelsea Semrau, MS, PA-C 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 Chelsea Semrau, MS, PA-C?
High performer (top quartile)Primary specialty
Surgical Oncology Physician
Medicare Part D claims
685 7× vs specialty avg
MIPS final score
91.3/100 8.2 pts vs avg
Specialty distribution in Connecticut
How Surgical Oncology Physician compares to other specialties among Connecticut providers
Medicare quality performance, MIPS
Chelsea Semrau, MS, PA-C's 2023 MIPS final score plotted against the Surgical Oncology Physician national average
- MIPS Final Score
- 91.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Surgical Oncology Physician) - 91.3/100 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).
Chelsea Semrau, MS, PA-C appears in the CMS NPPES registry as a Surgical Oncology Physician provider holding MS, PA-C credentials at 85 SEYMOUR ST STE 705, Hartford, CT, 06106, with a listed phone of (860) 972-4341. NPI 1699116582 was issued on 07/09/2013.
Medicare Part D records for calendar year 2023 show 685 prescription claims written by this provider, covering 174 Medicare beneficiaries and totaling roughly $76K in drug spend, with an opioid prescribing rate of 10.1%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.3/100 for the 2023 performance year (Quality 86.4, Cost 56.5), compared with the national average of 83.1.
Surgical Oncology Physician is a narrow specialty nationwide, with 1,410 enrolled providers across 50 states and an average of 97 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 | 1699116582 |
|---|---|
| Specialty | Surgical Oncology Physician |
| Credentials | MS, PA-C |
| Gender | Female |
| NPI Issued | 07/09/2013 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
91.2591
Final Score
Avg: 83.1
86.3769
Quality
56.5221
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Chelsea Semrau, MS, PA-C 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
West 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).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
685
Total Claims
$76K
Total Drug Cost
174
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 832
- Total Day Supply
- 16,899
- Generic Drug Cost
- $20K
- Opioid Claims
- 69 (10.1% rate)
- Antibiotic Claims
- 21
Patient Demographics
- Average Patient Age
- 71.8 years
- Avg HCC Risk Score
- 1.83
- Gender Split
- 100% female / 0% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Chelsea Semrau, MS, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ondansetron Hcl
Ondansetron Hcl
57 claims
- Prochlorperazine M…
Prochlorperazine Maleate
57 claims
- Gabapentin
Gabapentin
51 claims
- Dexamethasone
Dexamethasone
49 claims
- Oxycodone Hcl
Oxycodone Hcl
35 claims
- Xarelto 20
Xarelto
20 claims
- Duloxetine Hcl 17
Duloxetine Hcl
17 claims
- Lorazepam 17
Lorazepam
17 claims
| Drug | Claims |
|---|---|
| Ondansetron Hcl | 57 |
| Prochlorperazine Maleate | 57 |
| Gabapentin | 51 |
| Dexamethasone | 49 |
| Oxycodone Hcl | 35 |
| Xarelto Rivaroxaban | 20 |
| Duloxetine Hcl | 17 |
| Lorazepam | 17 |
| Pregabalin | 17 |
| Eliquis Apixaban | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Surgical Oncology Physician Overview
How Chelsea Semrau, MS, PA-C fits within the Surgical Oncology Physician landscape nationally.
1,410
Surgical Oncology Physician Providers in US
50
States with Surgical Oncology Physician
97
Avg Claims per Provider
Chelsea Semrau, MS, PA-C's 685 claims are above the specialty average of 97.
Nearby Surgical Oncology Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Semrau.
Dr. Leah Bassin
MD
Farmington, CT
Dr. Kevin Billingsley
MD
New Haven, CT
Dr. Joshua Bleicher
M.D.
New Haven, CT
Dr. Lindsay Bliss
M.D.
Hartford, CT
Dr. Glenda Callender
MD
Waterbury, CT
Compare Surgical Oncology 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 Surgical Oncology 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 Chelsea Semrau, MS, PA-C's specialty? ▼
Chelsea Semrau, MS, PA-C specializes in Surgical Oncology Physician and practices in Hartford, Connecticut. Credentials: MS, PA-C.
How much does Chelsea Semrau, MS, PA-C prescribe under Medicare Part D? ▼
In 2023, Chelsea Semrau, MS, PA-C wrote 685 Medicare Part D claims totaling $76K in drug costs for 174 beneficiaries.
What is Chelsea Semrau, MS, PA-C's Medicare quality score? ▼
Chelsea Semrau, MS, PA-C has a CMS MIPS Final Score of 91.3/100 (Quality: 86.4, Cost: 56.5). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Chelsea Semrau, MS, PA-C located? ▼
Chelsea Semrau, MS, PA-C is located at 85 SEYMOUR ST STE 705, Hartford, CT, 06106. Phone: (860) 972-4341.
What is Chelsea Semrau, MS, PA-C's NPI number? ▼
Chelsea Semrau, MS, PA-C's National Provider Identifier (NPI) is 1699116582, issued on 07/09/2013.
Does Chelsea Semrau, MS, PA-C prescribe opioids? ▼
Yes, Chelsea Semrau, MS, PA-C had 69 opioid claims in 2023 with an opioid prescribing rate of 10.1%.
How many Surgical Oncology Physician providers are there in the US? ▼
There are 1,410 Surgical Oncology Physician providers across 50 states in the US. The average Surgical Oncology Physician provider writes 97 Medicare Part D claims per year.
What drugs does Chelsea Semrau, MS, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Chelsea Semrau, MS, PA-C's most frequently prescribed drugs include Ondansetron Hcl, Prochlorperazine Maleate, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Chelsea Semrau, MS, PA-C accept Medicare? ▼
Chelsea Semrau, MS, PA-C appears in CMS Medicare data with 685 Part D claims and 174 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Chelsea Semrau, MS, PA-C's credentials? ▼
Chelsea Semrau, MS, PA-C's NPI is 1699116582 with credentials MS, PA-C. 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
Compiled from official public sources by the PlainDoctor editorial team.