Dr. John Mason McClellan, MD

  • Chapel Hill, NC
  • General surgeon
NPI1245674225PAC ID4587982087
Medicare services, 2024
43
Medicare patients, 2024
66
Publications
31
Hospital affiliations
2
Industry payments
$2,065
Practice address
101 Manning Drive, Chapel Hill, NC 27514
Practice phone
Call (919) 966-4141
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

UNC Hospitals

Hospital · Chapel Hill, North Carolina

See all 9 affiliations

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Dr. John Mason McClellan is a general surgeon in Chapel Hill, North Carolina

Dr. McClellan practices at UNC Hospitals in Chapel Hill, North Carolina, part of University of North Carolina Health Care System.

Dr. McClellan's NPI, 1245674225, was assigned on April 22, 2013. Dr. McClellan holds North Carolina license 2023-01390.

NPI and contact details
Medicare PAC ID
4587982087
NPI enumeration date
April 22, 2013
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(919) 966-4141
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
39
Medical school graduation
2013

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

Dr. John Mason McClellan practices at UNC Hospitals in Chapel Hill, North Carolina

Dr. McClellan's primary practice is UNC Hospitals, at 101 Manning Drive, Chapel Hill, NC 27514 in Orange County. The practice phone is (919) 966-4141.

  • UNC Hospitals
    101 Manning Drive, Chapel Hill, NC 27514 · Orange CountyPhone(919) 966-4141

Source: Dmand AI Affiliation Data

Dr. John Mason McClellan is affiliated with 4 sites of care and 5 medical groups

Dr. McClellan's primary practice is UNC Hospitals in Chapel Hill, North Carolina, part of University of North Carolina Health Care System. Dr. McClellan is also affiliated with Cape Fear Valley Medical Center. The medical group on file is UNC Faculty Physicians. Dmand AI also links Dr. McClellan to 4 more medical groups, 1 group practice or clinic and 1 therapy and rehab clinic, each named with a free account.

See all 9 affiliations for Dr. McClellan

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

Dmand AI tracks the EHR system at Dr. John Mason McClellan's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McClellan practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
UNC HospitalsAvailable with a free account
+3 more sites and 4 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dmand AI maps EHR vendors, IT decision makers and buying committees across University of North Carolina Health Care System and 6.2K+ hospitals, with verified contacts in the same login.

Dr. John Mason McClellan is one of 1,053 general surgeons in North Carolina

Surgery is Dr. McClellan's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. McClellan's licenses on file in 2 states: North Carolina and Washington.

Specialties and state licenses

  • Surgery, North CarolinaPrimaryLicense 2023-01390 · taxonomy 208600000X
  • Trauma surgery, WashingtonLicense MD60977216 · taxonomy 2086S0127X

General surgeons near Dr. McClellan

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. John Mason McClellan billed Medicare for 43 services in 2024

CMS data shows 43 Medicare services from Dr. McClellan across 2 procedure codes in 2024, for 66 Medicare patients. Medicare paid $3,024 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 202443
Medicare patients66
Paid by Medicare$3,024
Procedure codes2

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

  • 2023
  • 2024
Office and hospital visits
2023: 222024: 4395%

Dr. McClellan compared with the North Carolina median for general surgeons, 2024

  • Dr. McClellan
  • North Carolina median
Medicare services
43vs 15172% below
Medicare patients
66vs 11543% below

Medians across 950 general surgeons in North Carolina with Dmand AI profiles that report each measure.

Dr. McClellan'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. McClellan

Need commercial claims for Dr. McClellan?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. McClellan and other general surgeons in North Carolina.

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

Dr. John Mason McClellan treated 66 Medicare patients in 2024, average age 74

CMS counts 66 Medicare patients who saw Dr. McClellan in 2024. The largest group is 65 to 74, with 21 patients. 75% of them have high blood pressure, and 68% have high cholesterol. 20% are also on Medicaid. Their average risk score is 2.45, 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. McClellan's median patient age at 71, with 42% women.

Medicare patients, 202466
Average age74
Average risk score2.45
Also on Medicaid20%

Dr. McClellan's Medicare patients by age, 2024

Dr. McClellan's Medicare patients by sex, 2024

  • Women3350%
  • Men3350%

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

  1. High blood pressure75%
  2. High cholesterol68%
  3. Anxiety58%
  4. Arthritis58%
  5. Mood disorders52%
  6. Depression48%
  7. Chronic kidney disease42%
  8. Diabetes39%

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

Dr. McClellan's patients across all payers

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

Patient panel by age, all payers

Median age 71

Patient panel by sex, all payers

  • Women42%
  • Men58%

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

How Dr. John Mason McClellan takes part in Medicare

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

Accepts Medicare assignment
Yes

Removal of tissue: 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); and Doctors and Clinicians Utilization Data (CMS)

For MedTech and pharma teams

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Dr. John Mason McClellan has 31 publications on record

Dmand AI links 31 papers to Dr. McClellan, published from 2015 to 2025. 2023 was the busiest year, with 6. The most frequent topics are Swine, Resuscitation and Wounds and Injuries. Dr. McClellan has published most often in J Trauma Acute Care Surg. Dr. McClellan's most frequent co-authors are Daniel Taylor Lammers, MD, Jason Ray Bingham, MD and Richard David Betzold, MD.

Papers31
Years published2015 to 2025

Dr. McClellan's papers by year, 2015 to 2025

Topics Dr. McClellan writes about most

  • Swine
  • Resuscitation
  • Wounds and Injuries
  • Blood Transfusion
  • Disease Models, Animal
  • Hemorrhage
  • Shock, Hemorrhagic
  • Emergency Medical Services

Dr. McClellan's most frequent co-authors

Recent publications by Dr. McClellan

See all 31 publications and co-authors

See who Dr. McClellan researches with

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

How network discovery works

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

Dr. John Mason McClellan received $2,065 in industry payments from 2016 to 2024

CMS Open Payments shows 15 general payments to Dr. McClellan from 6 drug and device companies from 2016 to 2024. Travel and lodging make up the largest share, 48% of the total. Zimmer Biomet Holdings, Inc. paid the most, $1,155.

General payments to Dr. McClellan by program year, 2016 to 2024

General payments to Dr. McClellan by kind, 2016 to 2024

$2.1Kin total
  • Travel and lodging$98948%
  • Food and beverage$77337%
  • Grants$30315%

Companies that paid Dr. McClellan the most, 2016 to 2024

Share is of all general payments to this clinician.

See all payments to Dr. McClellan

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

Sources for Dr. John Mason McClellan'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)
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)
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. John Mason McClellan

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. John Mason McClellan's NPI number?

Dr. John Mason McClellan's NPI number is 1245674225. It was assigned on April 22, 2013, and it is active in the NPI Registry.

What kind of doctor is Dr. John Mason McClellan?

Dr. John Mason McClellan is a general surgeon in Chapel Hill, North Carolina. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).

Where does Dr. John Mason McClellan practice?

Dr. McClellan practices at 101 Manning Drive, Chapel Hill, NC 27514. Dr. McClellan's primary practice is UNC Hospitals in Chapel Hill, North Carolina, part of University of North Carolina Health Care System. Dmand AI also links Dr. McClellan to 4 medical groups, 1 group practice or clinic and 1 therapy and rehab clinic.

What is Dr. John Mason McClellan's office phone number?

The practice phone on file for Dr. McClellan is (919) 966-4141.

What is Dr. John Mason McClellan's medical license number?

Dr. McClellan holds North Carolina license 2023-01390, one of the licenses on file in 2 states.

Which states has Dr. John Mason McClellan been licensed in?

Dmand AI has state licenses on file for Dr. McClellan in North Carolina and Washington.

Which hospitals is Dr. John Mason McClellan affiliated with?

Dr. McClellan practices at UNC Hospitals in Chapel Hill, North Carolina. Dr. McClellan is also affiliated with Cape Fear Valley Medical Center.

What medical group is Dr. John Mason McClellan part of?

Dr. McClellan is linked to UNC Faculty Physicians. Dmand AI links Dr. McClellan to 4 more medical groups.

Does Dr. John Mason McClellan accept Medicare?

Yes. CMS data shows Dr. McClellan billed Medicare for 43 services in 2024, and Dr. McClellan accepts Medicare assignment.

How many Medicare patients does Dr. John Mason McClellan see?

CMS counts 66 Medicare patients who saw Dr. McClellan in 2024, with an average age of 74.

Show 5 more questionsShow fewer questions

What services does Dr. John Mason McClellan bill to Medicare?

In 2024, Dr. McClellan's most billed Medicare services were hospital inpatient care (99232) and hospital inpatient care (99222).

Has Dr. John Mason McClellan received payments from drug or device companies?

CMS Open Payments shows $2,065 in general payments to Dr. McClellan from 6 companies from 2016 to 2024. The largest total came from Zimmer Biomet Holdings, Inc.

How long has Dr. John Mason McClellan been practicing?

Dr. McClellan graduated from medical school in 2013, 13 years ago.

Does Dr. John Mason McClellan do research?

Dmand AI links 31 publications to Dr. McClellan, published from 2015 to 2025.

Who does Dr. John Mason McClellan publish with?

Dr. McClellan's most frequent co-authors are Daniel Taylor Lammers, MD (13 shared papers), Jason Ray Bingham, MD (11 shared papers) and Richard David Betzold, MD (5 shared papers).

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