Nels Davis Carroll

  • Mountain View, CA
  • Cardiothoracic surgeon
NPI1396122099PAC ID9638462344
Medicare services, 2024
114
Medicare patients, 2024
91
Part D claims, 2024
11
Publications
11
Hospital affiliations
3
Practice address
2500 Grant Road, Mountain View, CA 94040
Practice phone
Call (650) 940-7000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

El Camino Health - Mountain View Hospital

Hospital · Mountain View, California

See all 8 affiliations

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Nels Davis Carroll is a cardiothoracic surgeon in Mountain View, California

Nels Carroll practices at El Camino Health - Mountain View Hospital in Mountain View, California, part of El Camino Healthcare District.

Nels Carroll's NPI, 1396122099, was assigned on May 1, 2015. Nels Carroll graduated from Lewis Katz School of Medicine in 2015. Nels Carroll holds California license A192800.

NPI and contact details
Medicare PAC ID
9638462344
NPI enumeration date
May 1, 2015
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(650) 940-7000
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
37
Medical school graduation
2015

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Nels Davis Carroll practices at El Camino Health - Mountain View Hospital in Mountain View, California

Nels Carroll's primary practice is El Camino Health - Mountain View Hospital, at 2500 Grant Road, Mountain View, CA 94040 in Santa Clara County. The practice phone is (650) 940-7000.

Source: Dmand AI Affiliation Data

Nels Davis Carroll is affiliated with 5 sites of care and 3 medical groups

Nels Carroll's primary practice is El Camino Health - Mountain View Hospital in Mountain View, California, part of El Camino Healthcare District. Nels Carroll is also affiliated with UCLA West Valley Medical Center. The medical group on file is El Camino Health Medical Network. Dmand AI also links Nels Carroll to 1 more hospital, 2 hospital outpatient departments and 2 medical groups, each named with a free account.

See all 8 affiliations for Nels Carroll

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Nels Davis Carroll's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Nels Carroll practices, 5 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
El Camino Health - Mountain View HospitalAvailable with a free account
+4 more sites and 2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Nels Davis Carroll is one of 568 cardiothoracic surgeons in California

Thoracic surgery (cardiothoracic vascular surgery) is Nels Carroll's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Nels Carroll is board certified in thoracic and cardiac surgery by the American Board of Thoracic Surgery. Dmand AI has Nels Carroll's licenses on file in 2 states: California and Washington.

Specialties and state licenses

  • Thoracic surgery (cardiothoracic vascular surgery), CaliforniaPrimaryLicense A192800 · 2024 to 2026 · taxonomy 208G00000X
  • Washington licenseLicense MD61172512 · 2021 to 2026

Clinical focus

Dmand AI lists heart bypass surgery, heart valve surgery and lung resection among the conditions Nels Carroll treats.

Cardiothoracic surgeons near Nels Carroll

Counts of cardiothoracic 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

Nels Davis Carroll billed Medicare for 114 services in 2024

CMS data shows 114 Medicare services from Nels Carroll across 6 procedure codes in 2024, for 91 Medicare patients. Medicare paid $19,738 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024114
Medicare patients91
Paid by Medicare$19,738
Procedure codes6

Nels Carroll's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 1012024: 8714%
Surgery
2023: 1122024: 2776%

Nels Carroll compared with the California median for cardiothoracic surgeons, 2024

  • Nels Carroll
  • California median
Medicare services
114vs 114Close to median
Medicare patients
91vs 95Close to median
Part D claims
11vs 1942% below

Medians across 453 cardiothoracic surgeons in California with Dmand AI profiles that report each measure.

Nels Carroll'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.

See all procedures by Nels Carroll

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Nels Davis Carroll treated 91 Medicare patients in 2024, average age 77

CMS counts 91 Medicare patients who saw Nels Carroll in 2024. The largest group is 65 to 74, with 37 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.59, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Nels Carroll's median patient age at 72, with 45% women.

Medicare patients, 202491
Average age77
Average risk score1.59
Also on Medicaid16%

Nels Carroll's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Nels Carroll's Medicare patients by sex, 2024

  • Women3640%
  • Men5560%

Chronic conditions among Nels Carroll's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Ischemic heart disease71%
  4. Arthritis57%
  5. Heart failure47%
  6. Atrial fibrillation42%
  7. COPD41%
  8. Cancer36%

Share of Medicare patients with each condition. A patient can have several.

Nels Carroll'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

  • Women45%
  • Men55%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Nels Davis Carroll wrote 11 Medicare Part D claims in 2024

In 2024, Nels Carroll wrote 11 Medicare Part D claims. 100% of them were for generic drugs. They cover 1 drug, with $42 in total drug cost.

Part D claims, 202411
Drugs named by CMS1
Total drug cost$42

Nels Carroll's most prescribed drugs by claims, 2023

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

See all prescribing by Nels Carroll

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

Nels Davis Carroll ranks in the 61st percentile for coronary artery bypass graft (cabg) in Medicare

Nels Carroll accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 17 procedures of coronary artery bypass graft (cabg) by Nels Carroll, more than 61% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes

Where Nels Carroll ranks in Medicare procedure volume

Coronary artery bypass graft (CABG)
61st percentile17 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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Nels Davis Carroll has 11 publications on record

Dmand AI links 11 papers to Nels Carroll, published from 2016 to 2020. 2019 was the busiest year, with 4. The most frequent topics are Aortic Valve. Nels Carroll has published most often in J Thorac Cardiovasc Surg. Nels Carroll's most frequent co-authors are Dawn Szu-Fei Hui, MD, Gorav Ailawadi, MD and Kevin M. Beers, DO.

Papers11
Years published2016 to 2020

Nels Carroll's papers by year, 2016 to 2020

Topics Nels Carroll writes about most

  • Aortic Valve

Nels Carroll's most frequent co-authors

Recent publications by Nels Carroll

See all 11 publications and co-authors

See who Nels Carroll researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Nels Carroll works with, so you can find a warm path to the right cardiothoracic surgeons.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Nels Davis Carroll received $27,180 in industry payments from 2019 to 2025

CMS Open Payments shows 161 general payments to Nels Carroll from 18 drug and device companies from 2019 to 2025. Education make up the largest share, 54% of the total. Intuitive Surgical, Inc. paid the most, $17,859.

General payments to Nels Carroll by program year, 2019 to 2025

General payments to Nels Carroll by kind, 2019 to 2025

$27.2Kin total
  • Education$14,69354%
  • Travel and lodging$7,63228%
  • Food and beverage$4,85418%

Companies that paid Nels Carroll the most, 2019 to 2025

Share is of all general payments to this clinician.

See all payments to Nels Carroll

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Nels Davis Carroll graduated from Lewis Katz School of Medicine

Nels Carroll graduated from Lewis Katz School of Medicine in 2015.

  1. Medical schoolLewis Katz School of Medicine
  2. Board certified in thoracic and cardiac surgeryAmerican Board of Thoracic Surgery

Source: Dmand AI Professional Profile Data

Nels Davis Carroll accepts plans from 9 insurance carriers

Nels Carroll is in network with 9 carriers, including Blue Cross Blue Shield of Michigan, Cigna and Humana. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.

  • Blue Cross Blue Shield of Michigan
  • Cigna
  • Humana
  • Kaiser Permanente
  • Blue Cross Blue Shield of Massachusetts
  • Elevance
  • HCSC
  • Regence Health Plans
  • +1 more carriersWith a free account

Plan types Nels Carroll accepts, by number of carriers

  1. Medicare9
  2. PPO8
  3. HMO4
  4. POS1

Source: Dmand AI Insurance Network Data

Sources for Nels Davis Carroll's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors 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-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Nels Davis Carroll

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Nels Davis Carroll's NPI number?

Nels Davis Carroll's NPI number is 1396122099. It was assigned on May 1, 2015, and it is active in the NPI Registry.

What does Nels Davis Carroll specialize in?

Nels Davis Carroll is a cardiothoracic surgeon in Mountain View, California. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).

Where does Nels Davis Carroll practice?

Nels Carroll practices at 2500 Grant Road, Mountain View, CA 94040. Nels Carroll's primary practice is El Camino Health - Mountain View Hospital in Mountain View, California, part of El Camino Healthcare District. Dmand AI also links Nels Carroll to 1 hospital, 2 hospital outpatient departments and 2 medical groups.

What is Nels Davis Carroll's office phone number?

The practice phone on file for Nels Carroll is (650) 940-7000.

What is Nels Davis Carroll's medical license number?

Nels Carroll holds California license A192800, one of the licenses on file in 2 states.

Which states has Nels Davis Carroll been licensed in?

Dmand AI has state licenses on file for Nels Carroll in California (2024 to 2026) and Washington (2021 to 2026).

Which hospitals is Nels Davis Carroll affiliated with?

Nels Carroll practices at El Camino Health - Mountain View Hospital in Mountain View, California. Nels Carroll is also affiliated with UCLA West Valley Medical Center. Dmand AI links Nels Carroll to 1 more hospital.

What medical group is Nels Davis Carroll part of?

Nels Carroll is linked to El Camino Health Medical Network. Dmand AI links Nels Carroll to 2 more medical groups.

Does Nels Davis Carroll accept Medicare?

Yes. CMS data shows Nels Carroll billed Medicare for 114 services in 2024, and Nels Carroll accepts Medicare assignment.

How many Medicare patients does Nels Davis Carroll see?

CMS counts 91 Medicare patients who saw Nels Carroll in 2024, with an average age of 77.

Show 9 more questionsShow fewer questions

Is Nels Davis Carroll board certified?

Yes. Nels Carroll is board certified in thoracic and cardiac surgery by the American Board of Thoracic Surgery.

What services does Nels Davis Carroll bill to Medicare?

In 2024, Nels Carroll's most billed Medicare services were office visit, established patient (99215), hospital inpatient care (99232) and surgery: heart and blood vessels (33361).

Where did Nels Davis Carroll go to medical school?

Nels Carroll graduated from Lewis Katz School of Medicine in 2015.

What drugs does Nels Davis Carroll prescribe most?

In 2023 Medicare Part D data, Nels Carroll's most prescribed drugs by claims were Tramadol HCl.

Has Nels Davis Carroll received payments from drug or device companies?

CMS Open Payments shows $27,180 in general payments to Nels Carroll from 18 companies from 2019 to 2025. The largest total came from Intuitive Surgical, Inc.

How long has Nels Davis Carroll been practicing?

Nels Carroll graduated from medical school in 2015, 11 years ago.

Does Nels Davis Carroll do research?

Dmand AI links 11 publications to Nels Carroll, published from 2016 to 2020.

Who does Nels Davis Carroll publish with?

Nels Carroll's most frequent co-authors are Dawn Szu-Fei Hui, MD (3 shared papers), Gorav Ailawadi, MD (1 shared paper) and Kevin M. Beers, DO (1 shared paper).

What insurance does Nels Davis Carroll accept?

Nels Carroll is in network with 9 carriers, including Blue Cross Blue Shield of Michigan, Cigna and Humana. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.

Selling to thoracic surgery (cardiothoracic vascular surgery) practices?

See cardiothoracic surgeons in California by site of care and group

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