Blood Loss, SurgicalCardiac Surgical ProceduresErythrocyte Transfusion
Dr. Mark G. Nelson, MD
NPI1134111743PAC ID6103019526
- Medicare services, 2024
- 380
- Medicare patients, 2024
- 302
- Part D claims, 2024
- 51
- Publications
- 1
- MIPS score, 2024
- 95
- Practice address
- 12500 Willowbrook Road, Cumberland, MD 21502
- Practice phone
- Call (240) 964-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Nelson's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark G. Nelson is a cardiothoracic surgeon in Cumberland, Maryland
Dr. Nelson practices at UPMC Western Maryland in Cumberland, Maryland, part of University of Pittsburgh Medical Center.
Dr. Nelson's NPI, 1134111743, was assigned on August 19, 2005. Dr. Nelson graduated from University of Maryland School of Medicine in 1987. Dr. Nelson holds Maryland license D0056355.
NPI and contact details
- NPI
- 1134111743NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103019526
- NPI enumeration date
- August 19, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (240) 964-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark G. Nelson practices at UPMC Western Maryland in Cumberland, Maryland
Dr. Nelson's primary practice is UPMC Western Maryland, at 12500 Willowbrook Road, Cumberland, MD 21502 in Allegany County. The practice phone is (240) 964-7000.
- UPMC Western Maryland12500 Willowbrook Road, Cumberland, MD 21502 · Allegany CountyPhone(240) 964-7000
Source: Dmand AI Affiliation Data
Dr. Mark G. Nelson is affiliated with 7 sites of care and 2 medical groups
Dr. Nelson's primary practice is UPMC Western Maryland in Cumberland, Maryland, part of University of Pittsburgh Medical Center. Dr. Nelson is also affiliated with Potomac Valley Hospital. The medical group on file is UPMC Western Maryland Obstetrics and Gynecology. Dmand AI also links Dr. Nelson to 1 more hospital, 2 group practices and clinics, 2 home health agencies and 1 medical group, each named with a free account.
Potomac Valley HospitalUPMC Western Maryland Obstetrics and Gynecology1 hospitalName with a free account2 group practices and clinicsNames with a free account2 home health agenciesNames with a free account1 medical groupName with a free account
See all 9 affiliations for Dr. NelsonSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark G. Nelson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nelson practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UPMC Western Maryland | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Nelson practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across University of Pittsburgh Medical Center and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark G. Nelson is one of 77 cardiothoracic surgeons in Maryland
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Nelson's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Nelson is licensed in Maryland.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), MarylandPrimary
Cardiothoracic surgeons near Dr. Nelson
Counts of cardiothoracic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
77cardiothoracic surgeons in Maryland
2cardiothoracic surgeons in Cumberland
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark G. Nelson billed Medicare for 380 services in 2024
CMS data shows 380 Medicare services from Dr. Nelson across 13 procedure codes in 2024, for 302 Medicare patients. Medicare paid $144,902 for them.
Medicare services, 2024380
Medicare patients302
Paid by Medicare$144,902
Procedure codes13
Dr. Nelson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1082024: 236119%
- Office and hospital visits
- 2023: 1582024: 1449%
Where Dr. Nelson's Medicare services took place, 2024
- In an office14438%
- In a facility23662%
Dr. Nelson compared with the Maryland median for cardiothoracic surgeons, 2024
- Dr. Nelson
- Maryland median
- Medicare services
- 380vs 1892.0 times
- Medicare patients
- 302vs 1442.1 times
- Part D claims
- 12vs 1520% below
Medians across 66 cardiothoracic surgeons in Maryland with Dmand AI profiles that report each measure.
Dr. Nelson'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.
Need commercial claims for Dr. Nelson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nelson and other cardiothoracic surgeons in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark G. Nelson treated 302 Medicare patients in 2024, average age 76
CMS counts 302 Medicare patients who saw Dr. Nelson in 2024. The largest group is 75 to 84, with 115 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.68, 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. Nelson's median patient age at 75, with 34% women.
Medicare patients, 2024302
Average age76
Average risk score1.68
Also on Medicaid20%
Dr. Nelson's Medicare patients by age, 2024
Dr. Nelson's Medicare patients by sex, 2024
- Women13244%
- Men17056%
Chronic conditions among Dr. Nelson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease68%
- Arthritis60%
- Heart failure53%
- Atrial fibrillation48%
- Diabetes46%
- Chronic kidney disease42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nelson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women34%
- Men65%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark G. Nelson wrote 51 Medicare Part D claims in 2024
In 2024, Dr. Nelson wrote 51 Medicare Part D claims for 36 patients. 88% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $28 in total drug cost. In 2023, CMS named 12 claims across 1 drug.
Part D claims, 202451
Drugs named by CMS1
Total drug cost$28
Part D patients36
Dr. Nelson's Part D claims by kind of drug, 2024
- Generic45 claims88%
- Brand-name and other6 claims12%
Dr. Nelson'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 122024: 12No change
Drugs named by CMS: 1 in 2024, 1 in 2023.
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 G. Nelson scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Nelson for performance year 2024, reported through an alternative payment model (APM). Dr. Nelson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 45 procedures of coronary artery bypass graft (cabg) by Dr. Nelson, more than 94% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Nelson's MIPS scores, performance year 2024
- 95of 100Final score
- 79.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Nelson ranks in Medicare procedure volume
- Pacemaker insertion or repair
- 92nd percentile59 procedures
- Coronary artery bypass graft (CABG)
- 94th percentile45 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of tissue: 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 G. Nelson has 1 publication on record
Dmand AI links 1 paper to Dr. Nelson in 2016. Dr. Nelson's most frequent co-authors are James Morris Brown, MD, John Victor Conte, MD and Keith A. Horvath, MD.
Papers1
Dr. Nelson's most frequent co-authors
- James Morris Brown, MD1 shared paper
- John Victor Conte, MD1 shared paper
- Keith A. Horvath, MD1 shared paper
Recent publications by Dr. Nelson
See who Dr. Nelson researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nelson works with, so you can find a warm path to the right cardiothoracic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark G. Nelson received $795 in industry payments from 2016 to 2025
CMS Open Payments shows 26 general payments to Dr. Nelson from 14 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. AtriCure, Inc. paid the most, $206.
General payments to Dr. Nelson by program year, 2016 to 2025
Companies that paid Dr. Nelson the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark G. Nelson graduated from University of Maryland School of Medicine
Dr. Nelson graduated from University of Maryland School of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark G. Nelson'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 G. Nelson
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 G. Nelson's NPI number?
Dr. Mark G. Nelson's NPI number is 1134111743. It was assigned on August 19, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark G. Nelson?
Dr. Mark G. Nelson is a cardiothoracic surgeon in Cumberland, Maryland. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).
Where does Dr. Mark G. Nelson practice?
Dr. Nelson practices at 12500 Willowbrook Road, Cumberland, MD 21502. Dr. Nelson's primary practice is UPMC Western Maryland in Cumberland, Maryland, part of University of Pittsburgh Medical Center. Dmand AI also links Dr. Nelson to 1 hospital, 2 group practices and clinics, 2 home health agencies and 1 medical group.
What is Dr. Mark G. Nelson's office phone number?
The practice phone on file for Dr. Nelson is (240) 964-7000.
What is Dr. Mark G. Nelson's medical license number?
Dr. Nelson holds Maryland license D0056355.
Which hospitals is Dr. Mark G. Nelson affiliated with?
Dr. Nelson practices at UPMC Western Maryland in Cumberland, Maryland. Dr. Nelson is also affiliated with Potomac Valley Hospital. Dmand AI links Dr. Nelson to 1 more hospital.
What medical group is Dr. Mark G. Nelson part of?
Dr. Nelson is linked to UPMC Western Maryland Obstetrics and Gynecology. Dmand AI links Dr. Nelson to 1 more medical group.
Does Dr. Mark G. Nelson accept Medicare?
Yes. CMS data shows Dr. Nelson billed Medicare for 380 services in 2024, and Dr. Nelson accepts Medicare assignment.
What is Dr. Mark G. Nelson's MIPS score?
Dr. Nelson's MIPS final score for performance year 2024 is 95 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Mark G. Nelson see?
CMS counts 302 Medicare patients who saw Dr. Nelson in 2024, with an average age of 76.
Show 7 more questionsShow fewer questions
What services does Dr. Mark G. Nelson bill to Medicare?
In 2024, Dr. Nelson's most billed Medicare services were surgery: heart and blood vessels (33208), office visit, new patient (99205) and office visit, new patient (99203).
Where did Dr. Mark G. Nelson go to medical school?
Dr. Nelson graduated from University of Maryland School of Medicine in 1987.
What drugs does Dr. Mark G. Nelson prescribe most?
In 2024 Medicare Part D data, Dr. Nelson's most prescribed drugs by claims were Clopidogrel.
Has Dr. Mark G. Nelson received payments from drug or device companies?
CMS Open Payments shows $795 in general payments to Dr. Nelson from 14 companies from 2016 to 2025. The largest total came from AtriCure, Inc.
How long has Dr. Mark G. Nelson been practicing?
Dr. Nelson graduated from medical school in 1987, 39 years ago.
Does Dr. Mark G. Nelson do research?
Dmand AI links 1 publication to Dr. Nelson.
Who does Dr. Mark G. Nelson publish with?
Dr. Nelson's most frequent co-authors are James Morris Brown, MD (1 shared paper), John Victor Conte, MD (1 shared paper) and Keith A. Horvath, MD (1 shared paper).
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