Dr. Marc K. Eckstein, MD

  • Thousand Oaks, CA
  • Emergency medicine physician
NPI1922010867PAC ID3274500640
Medicare services, 2024
1,418
Medicare patients, 2024
854
Part D claims, 2024
198
Publications
12
Clinical trials
1
Practice address
215 W Janss Rd, Thousand Oaks, CA 91360
Practice phone
Call (805) 497-2727
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Los Robles Regional Medical Center

Hospital · Thousand Oaks, California

See all 7 affiliations

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Dr. Marc K. Eckstein is an emergency medicine physician in Thousand Oaks, California

Dr. Eckstein practices at Los Robles Regional Medical Center in Thousand Oaks, California, part of HCA Healthcare.

Dr. Eckstein's NPI, 1922010867, was assigned on August 12, 2006. Dr. Eckstein graduated from Icahn School Of Medicine At Mount Sinai in 1989. Dr. Eckstein's California license number on file is G69852.

NPI and contact details
Medicare PAC ID
3274500640
NPI enumeration date
August 12, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(805) 497-2727
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Male
Estimated age
63
Medical school graduation
1989

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

Dr. Marc K. Eckstein practices at Los Robles Regional Medical Center in Thousand Oaks, California

Dr. Eckstein's primary practice is Los Robles Regional Medical Center, at 215 W Janss Rd, Thousand Oaks, CA 91360 in Ventura County. The practice phone is (805) 497-2727.

Source: Dmand AI Affiliation Data

Dr. Marc K. Eckstein is affiliated with 3 sites of care and 4 medical groups

Dr. Eckstein's primary practice is Los Robles Regional Medical Center in Thousand Oaks, California, part of HCA Healthcare. The medical group on file is USC Care Medical Group. Dmand AI also links Dr. Eckstein to 3 more medical groups and 2 group practices and clinics, each named with a free account.

See all 7 affiliations for Dr. Eckstein

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

Dmand AI tracks the EHR system at Dr. Marc K. Eckstein's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Eckstein practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Los Robles Regional Medical CenterAvailable with a free account
+2 more sites and 3 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Marc K. Eckstein is one of 7,423 emergency medicine physicians in California

Emergency medicine is Dr. Eckstein's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Eckstein is board certified in emergency medical services by the American Board of Emergency Medicine. Dmand AI has Dr. Eckstein's licenses on file in 4 states: California, Texas, Arizona and Florida.

Specialties and state licenses

  • Emergency medicine, CaliforniaPrimaryLicense G69852 · 1990 to 2025 · taxonomy 207P00000X
  • Texas licenseLicense T4513 · 2021 to 2025
  • Arizona license2022 to 2024
  • Florida licenseLicense ME153176 · 2021 to 2024

Emergency medicine physicians near Dr. Eckstein

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. Marc K. Eckstein billed Medicare for 1,418 services in 2024

CMS data shows 1,418 Medicare services from Dr. Eckstein across 6 procedure codes in 2024, for 854 Medicare patients. Medicare paid $128,846 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 20241,418
Medicare patients854
Paid by Medicare$128,846
Procedure codes6

Dr. Eckstein's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 4052024: 913125%
Tests and treatments
2023: 1972024: 491149%
Surgery
2023: 02024: 14

Dr. Eckstein compared with the California median for emergency medicine physicians, 2024

  • Dr. Eckstein
  • California median
Medicare services
1,418vs 2655.4 times
Medicare patients
854vs 2433.5 times
Part D claims
69vs 6211% above

Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.

Dr. Eckstein'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 Dr. Eckstein

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

Dr. Marc K. Eckstein treated 854 Medicare patients in 2024, average age 78

CMS counts 854 Medicare patients who saw Dr. Eckstein in 2024. The largest group is 75 to 84, with 305 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 2.05, 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. Eckstein's median patient age at 58, with 57% women.

Medicare patients, 2024854
Average age78
Average risk score2.05
Also on Medicaid17%

Dr. Eckstein's Medicare patients by age, 2024

Dr. Eckstein's Medicare patients by sex, 2024

  • Women49858%
  • Men35642%

Chronic conditions among Dr. Eckstein's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis64%
  4. Ischemic heart disease45%
  5. Anxiety40%
  6. Mood disorders40%
  7. Atrial fibrillation37%
  8. Chronic kidney disease37%

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

Dr. Eckstein's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 58

Patient panel by sex, all payers

  • Women57%
  • Men42%

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

Dr. Marc K. Eckstein wrote 198 Medicare Part D claims in 2024

In 2024, Dr. Eckstein wrote 198 Medicare Part D claims for 120 patients. 93% of them were for generic drugs. CMS names the drug for 69 of them, across 4 drugs with 11 or more claims each, at $284 in total drug cost. In 2023, CMS named 26 claims across 2 drugs.

Part D claims, 2024198
Drugs named by CMS4
Total drug cost$284
Part D patients120

Dr. Eckstein's Part D claims by kind of drug, 2024

  • Generic185 claims93%
  • Brand-name and other13 claims7%

Dr. Eckstein'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.

Drug classes CMS tracks in Dr. Eckstein's Part D claims, 2024

  • Opioids16%31 of 198 claims
  • Antibiotics24%48 of 198 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 262024: 69165%

Drugs named by CMS: 4 in 2024, 2 in 2023.

See all prescribing by Dr. Eckstein

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

How Dr. Marc K. Eckstein takes part in Medicare

Dr. Eckstein accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

For MedTech and pharma teams

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Dr. Marc K. Eckstein has 12 publications on record

Dmand AI links 12 papers to Dr. Eckstein, published from 2015 to 2021. 2018 was the busiest year, with 3. Dr. Eckstein's most frequent co-authors are Stephen George Sanko, MD, Robin Andrea Conwit, MD and Scott L. Hamilton, DO.

Papers12
Years published2015 to 2021

Dr. Eckstein's papers by year, 2015 to 2021

Dr. Eckstein's most frequent co-authors

Recent publications by Dr. Eckstein

See all 12 publications and co-authors

See who Dr. Eckstein researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Eckstein works with, so you can find a warm path to the right emergency medicine physicians.

How network discovery works

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

Dr. Marc K. Eckstein has worked on 1 clinical trial

Dmand AI links Dr. Eckstein to 1 clinical trial. Conditions studied include Stroke and Cerebrovascular Disorders.

Conditions in Dr. Eckstein's trials

  • Stroke
  • Cerebrovascular Disorders

Investigators on the most trials with Dr. Eckstein

Recent clinical trials with Dr. Eckstein

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Marc K. Eckstein received $470 in industry payments from 2019 to 2025

CMS Open Payments shows 5 general payments to Dr. Eckstein from 4 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $290.

General payments to Dr. Eckstein by program year, 2019 to 2025

Companies that paid Dr. Eckstein the most, 2019 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Eckstein

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

Dr. Marc K. Eckstein has 1 award and honors on record

Dmand AI lists 1 award for Dr. Eckstein.

Awards and honors for Dr. Eckstein

  1. Undated
    • ACEP Fellow

Source: Dmand AI Professional Profile Data

Dr. Marc K. Eckstein graduated from Icahn School Of Medicine At Mount Sinai

Dr. Eckstein graduated from Icahn School Of Medicine At Mount Sinai in 1989. Dr. Eckstein is a member of ACEP.

  1. Medical schoolIcahn School Of Medicine At Mount Sinai
  2. Board certified in emergency medical servicesAmerican Board of Emergency Medicine
  3. Board certified in emergency medicineAmerican Board of Emergency Medicine

Source: Dmand AI Professional Profile Data

Dr. Marc K. Eckstein accepts plans from 8 insurance carriers

Dr. Eckstein is in network with 8 carriers, including United Healthcare, Aetna and Aspirus Health Plan. PPO plans come from the most carriers, 4. Check the plan with the practice before a visit.

  • United Healthcare
  • Aetna
  • Aspirus Health Plan
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare
  • Elevance
  • EMI Health
  • HCSC

Plan types Dr. Eckstein accepts, by number of carriers

  1. PPO4
  2. HMO2
  3. Medicare2
  4. POS2
  5. EPO1

Source: Dmand AI Insurance Network Data

Sources for Dr. Marc K. Eckstein'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)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
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 Dr. Marc K. Eckstein

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. Marc K. Eckstein's NPI number?

Dr. Marc K. Eckstein's NPI number is 1922010867. It was assigned on August 12, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Marc K. Eckstein?

Dr. Marc K. Eckstein is an emergency medicine physician in Thousand Oaks, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).

Where does Dr. Marc K. Eckstein practice?

Dr. Eckstein practices at 215 W Janss Rd, Thousand Oaks, CA 91360. Dr. Eckstein's primary practice is Los Robles Regional Medical Center in Thousand Oaks, California, part of HCA Healthcare. Dmand AI also links Dr. Eckstein to 3 medical groups and 2 group practices and clinics.

What is Dr. Marc K. Eckstein's office phone number?

The practice phone on file for Dr. Eckstein is (805) 497-2727.

What is Dr. Marc K. Eckstein's medical license number?

Dr. Eckstein's California license number on file is G69852, one of the licenses on file in 4 states.

Which states has Dr. Marc K. Eckstein been licensed in?

Dmand AI has state licenses on file for Dr. Eckstein in California (1990 to 2025), Texas (2021 to 2025), Arizona (2022 to 2024) and Florida (2021 to 2024).

Which hospitals is Dr. Marc K. Eckstein affiliated with?

Dr. Eckstein practices at Los Robles Regional Medical Center in Thousand Oaks, California.

What medical group is Dr. Marc K. Eckstein part of?

Dr. Eckstein is linked to USC Care Medical Group. Dmand AI links Dr. Eckstein to 3 more medical groups.

Does Dr. Marc K. Eckstein accept Medicare?

Yes. CMS data shows Dr. Eckstein billed Medicare for 1,418 services in 2024, and Dr. Eckstein accepts Medicare assignment.

How many Medicare patients does Dr. Marc K. Eckstein see?

CMS counts 854 Medicare patients who saw Dr. Eckstein in 2024, with an average age of 78.

Show 9 more questionsShow fewer questions

Is Dr. Marc K. Eckstein board certified?

Yes. Dr. Eckstein is board certified in emergency medical services by the American Board of Emergency Medicine.

What services does Dr. Marc K. Eckstein bill to Medicare?

In 2024, Dr. Eckstein's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and critical care (99291).

Where did Dr. Marc K. Eckstein go to medical school?

Dr. Eckstein graduated from Icahn School Of Medicine At Mount Sinai in 1989.

What drugs does Dr. Marc K. Eckstein prescribe most?

In 2024 Medicare Part D data, Dr. Eckstein's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Ibuprofen and Ondansetron ODT.

Has Dr. Marc K. Eckstein received payments from drug or device companies?

CMS Open Payments shows $470 in general payments to Dr. Eckstein from 4 companies from 2019 to 2025. The largest total came from Stryker Corporation.

How long has Dr. Marc K. Eckstein been practicing?

Dr. Eckstein graduated from medical school in 1989, 37 years ago.

Does Dr. Marc K. Eckstein do research?

Dmand AI links 12 publications to Dr. Eckstein, published from 2015 to 2021. Dr. Eckstein has worked on 1 clinical trial.

Who does Dr. Marc K. Eckstein publish with?

Dr. Eckstein's most frequent co-authors are Stephen George Sanko, MD (5 shared papers), Robin Andrea Conwit, MD (2 shared papers) and Scott L. Hamilton, DO (2 shared papers).

What insurance does Dr. Marc K. Eckstein accept?

Dr. Eckstein is in network with 8 carriers, including United Healthcare, Aetna and Aspirus Health Plan. PPO plans come from the most carriers, 4. Check the plan with the practice before a visit.

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