Dr. Mark A. Demar, MD
- Medicare services, 2024
- 56
- Medicare patients, 2024
- 85
- Part D claims, 2024
- 111
- MIPS score, 2024
- 81
- Hospital affiliations
- 2
- Practice address
- 2001 Errecart Blvd, Elko, NV 89801
- Practice phone
- Call (775) 738-5151
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Demar's professional email, personal email and mobile number
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Dr. Mark A. Demar is a general surgeon in Elko, Nevada
Dr. Demar practices at Northeastern Nevada Regional Hospital in Elko, Nevada, part of Lifepoint Health.
Dr. Demar's NPI, 1821050253, was assigned on April 3, 2006. Dr. Demar graduated from University of Cincinnati College of Medicine in 1991. Dr. Demar holds Nevada license 12637.
- NPI
- 1821050253NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0143212704
- NPI enumeration date
- April 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (775) 738-5151
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark A. Demar practices at Northeastern Nevada Regional Hospital in Elko, Nevada
Dr. Demar's primary practice is Northeastern Nevada Regional Hospital, at 2001 Errecart Blvd, Elko, NV 89801 in Elko County. The practice phone is (775) 738-5151.
- Northeastern Nevada Regional Hospital2001 Errecart Blvd, Elko, NV 89801 · Elko CountyPhone(775) 738-5151
Source: Dmand AI Affiliation Data
Dr. Mark A. Demar is affiliated with 2 sites of care and 5 medical groups
Dr. Demar's primary practice is Northeastern Nevada Regional Hospital in Elko, Nevada, part of Lifepoint Health. Dr. Demar is also affiliated with Banner Churchill Community Hospital. The medical group on file is Banner Churchill Community Hospital. Dmand AI also links Dr. Demar to 4 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark A. Demar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Demar practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northeastern Nevada Regional Hospital | Available with a free account |
| +1 more site and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark A. Demar is one of 202 general surgeons in Nevada
Surgery is Dr. Demar's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Demar is licensed in Nevada.
Specialties and state licenses
- Surgery, NevadaPrimary
General surgeons near Dr. Demar
Counts of general 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. Mark A. Demar billed Medicare for 56 services in 2024
CMS data shows 56 Medicare services from Dr. Demar across 4 procedure codes in 2024, for 85 Medicare patients. Medicare paid $6,220 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Demar's Medicare services by type, 2022 to 2024
- 2022
- 2024
- Office and hospital visits
- 2022: 972024: 2970%
- Surgery
- 2022: 02024: 15
- Other services
- 2022: 02024: 12
Dr. Demar compared with the Nevada median for general surgeons, 2024
- Dr. Demar
- Nevada median
- Medicare services
- 56vs 17869% below
- Medicare patients
- 85vs 12834% below
- Part D claims
- 77vs 4667% above
Medians across 181 general surgeons in Nevada with Dmand AI profiles that report each measure.
Dr. Demar'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. Demar and other general surgeons in Nevada.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark A. Demar treated 85 Medicare patients in 2024, average age 72
CMS counts 85 Medicare patients who saw Dr. Demar in 2024. The largest group is 65 to 74, with 43 patients. 72% of them have high cholesterol, and 69% have high blood pressure. 22% are also on Medicaid. Their average risk score is 1.24, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Demar's median patient age at 61, with 54% women.
Dr. Demar's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Demar's Medicare patients by sex, 2024
- Women4351%
- Men4249%
Chronic conditions among Dr. Demar's Medicare patients, 2024
- High cholesterol72%
- High blood pressure69%
- COPD39%
- Arthritis38%
- Tobacco use29%
- Ischemic heart disease28%
- Diabetes26%
- Mood disorders25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Demar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark A. Demar wrote 111 Medicare Part D claims in 2024
In 2024, Dr. Demar wrote 111 Medicare Part D claims for 102 patients. 50% of them were for generic drugs. CMS names the drug for 77 of them, across 3 drugs with 11 or more claims each, at $933 in total drug cost. In 2022, CMS named 12 claims across 1 drug.
Dr. Demar's Part D claims by kind of drug, 2024
- Generic56 claims50%
- Brand-name55 claims50%
Dr. Demar'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. Demar's Part D claims, 2024
- Opioids17%19 of 111 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, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 122024: 77542%
Drugs named by CMS: 3 in 2024, 1 in 2022.
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. Mark A. Demar scored 81 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 81 out of 100 for Dr. Demar for performance year 2024, reported as part of a group. Dr. Demar accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 33 procedures of colonoscopy by Dr. Demar, more than 55% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Demar's MIPS scores, performance year 2024
- 81of 100Final score
- 68.1of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
- 69of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Demar ranks in Medicare procedure volume
- Colonoscopy
- 55th percentile33 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); 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. Mark A. Demar received $16,293 in industry payments from 2016 to 2023
CMS Open Payments shows 50 general payments to Dr. Demar from 3 drug and device companies from 2016 to 2023. Education make up the largest share, 68% of the total. Intuitive Surgical, Inc. paid the most, $16,262.
General payments to Dr. Demar by program year, 2016 to 2023
General payments to Dr. Demar by kind, 2016 to 2023
- Education$11,00068%
- Travel and lodging$4,09425%
- Food and beverage$1,1997%
Companies that paid Dr. Demar the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark A. Demar graduated from University of Cincinnati College of Medicine
Dr. Demar graduated from University of Cincinnati College of Medicine in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark A. Demar'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 | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)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. Mark A. Demar
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. Mark A. Demar's NPI number?
Dr. Mark A. Demar's NPI number is 1821050253. It was assigned on April 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark A. Demar?
Dr. Mark A. Demar is a general surgeon in Elko, Nevada. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Mark A. Demar practice?
Dr. Demar practices at 2001 Errecart Blvd, Elko, NV 89801. Dr. Demar's primary practice is Northeastern Nevada Regional Hospital in Elko, Nevada, part of Lifepoint Health. Dmand AI also links Dr. Demar to 4 medical groups.
What is Dr. Mark A. Demar's office phone number?
The practice phone on file for Dr. Demar is (775) 738-5151.
What is Dr. Mark A. Demar's medical license number?
Dr. Demar holds Nevada license 12637.
Which hospitals is Dr. Mark A. Demar affiliated with?
Dr. Demar practices at Northeastern Nevada Regional Hospital in Elko, Nevada. Dr. Demar is also affiliated with Banner Churchill Community Hospital.
What medical group is Dr. Mark A. Demar part of?
Dr. Demar is linked to Banner Churchill Community Hospital. Dmand AI links Dr. Demar to 4 more medical groups.
Does Dr. Mark A. Demar accept Medicare?
Yes. CMS data shows Dr. Demar billed Medicare for 56 services in 2024, and Dr. Demar accepts Medicare assignment.
What is Dr. Mark A. Demar's MIPS score?
Dr. Demar's MIPS final score for performance year 2024 is 81 out of 100, reported as part of a group.
How many Medicare patients does Dr. Mark A. Demar see?
CMS counts 85 Medicare patients who saw Dr. Demar in 2024, with an average age of 72.
Show 5 more questionsShow fewer questions
What services does Dr. Mark A. Demar bill to Medicare?
In 2024, Dr. Demar's most billed Medicare services were hospital inpatient care (99232), surgery: digestive system (45380) and medicare service (G0121).
Where did Dr. Mark A. Demar go to medical school?
Dr. Demar graduated from University of Cincinnati College of Medicine in 1991.
What drugs does Dr. Mark A. Demar prescribe most?
In 2024 Medicare Part D data, Dr. Demar's most prescribed drugs by claims were Peg-3350 And Electrolytes, Gavilyte-G and Oxycodone-Acetaminophen.
Has Dr. Mark A. Demar received payments from drug or device companies?
CMS Open Payments shows $16,293 in general payments to Dr. Demar from 3 companies from 2016 to 2023. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Mark A. Demar been practicing?
Dr. Demar graduated from medical school in 1991, 35 years ago.
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