Dr. John B. Mack, MD
- Medicare services, 2024
- 686
- Medicare patients, 2024
- 355
- Part D claims, 2024
- 469
- Hospital affiliations
- 2
- Industry payments
- $765
- Practice address
- 2901 N Fourth St, Longview, TX 75605
- Practice phone
- Call (903) 758-1818
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mack's professional email, personal email and mobile number
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Dr. John B. Mack is a general surgeon in Longview, Texas
Dr. Mack practices at Longview Regional Medical Center in Longview, Texas, part of Community Health Systems.
Dr. Mack's NPI, 1801826151, was assigned on July 3, 2006. Dr. Mack graduated from Baylor College of Medicine in 1987. Dr. Mack holds Texas license H6396.
- NPI
- 1801826151NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8123019882
- NPI enumeration date
- July 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (903) 758-1818
- 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. John B. Mack practices at Longview Regional Medical Center in Longview, Texas
Dr. Mack's primary practice is Longview Regional Medical Center, at 2901 N Fourth St, Longview, TX 75605 in Gregg County. The practice phone is (903) 758-1818.
- Longview Regional Medical Center2901 N Fourth St, Longview, TX 75605 · Gregg CountyPhone(903) 758-1818
Source: Dmand AI Affiliation Data
Dr. John B. Mack is affiliated with 3 sites of care and 1 medical group
Dr. Mack's primary practice is Longview Regional Medical Center in Longview, Texas, part of Community Health Systems. Dr. Mack is also affiliated with CHRISTUS Good Shepherd Medical Center - Longview. The medical group on file is Diagnostic Clinic of Longview. Dmand AI also links Dr. Mack to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John B. Mack's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mack practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Longview Regional Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John B. Mack is one of 1,939 general surgeons in Texas
Surgery is Dr. Mack's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Mack is licensed in Texas.
Specialties and state licenses
- Surgery, TexasPrimary
General surgeons near Dr. Mack
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 B. Mack billed Medicare for 686 services in 2024
CMS data shows 686 Medicare services from Dr. Mack across 13 procedure codes in 2024, for 355 Medicare patients. Medicare paid $90,143 for them.
Dr. Mack's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4872024: 4439%
- Surgery
- 2023: 1972024: 12039%
- Imaging
- 2023: 322024: 79147%
- Other services
- 2023: 292024: 4452%
Where Dr. Mack's Medicare services took place, 2024
- In an office56683%
- In a facility12017%
Dr. Mack compared with the Texas median for general surgeons, 2024
- Dr. Mack
- Texas median
- Medicare services
- 686vs 1185.8 times
- Medicare patients
- 355vs 973.7 times
- Part D claims
- 451vs 4210.7 times
Medians across 1,674 general surgeons in Texas with Dmand AI profiles that report each measure.
Dr. Mack'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. Mack and other general surgeons in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John B. Mack treated 355 Medicare patients in 2024, average age 73
CMS counts 355 Medicare patients who saw Dr. Mack in 2024. The largest group is 65 to 74, with 207 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 4% are also on Medicaid. Their average risk score is 1.11, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mack's median patient age at 71, with 71% women.
Dr. Mack's Medicare patients by age, 2024
Dr. Mack's Medicare patients by sex, 2024
- Women27778%
- Men7822%
Chronic conditions among Dr. Mack's Medicare patients, 2024
- High blood pressure75%
- High cholesterol74%
- Cancer56%
- Arthritis42%
- Anxiety29%
- Ischemic heart disease26%
- Diabetes24%
- Mood disorders23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mack'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
- Women71%
- Men28%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John B. Mack wrote 469 Medicare Part D claims in 2024
In 2024, Dr. Mack wrote 469 Medicare Part D claims for 218 patients. 98% of them were for generic drugs. CMS names the drug for 451 of them, across 3 drugs with 11 or more claims each, at $1,770 in total drug cost. In 2023, CMS named 378 claims across 2 drugs.
Dr. Mack's Part D claims by kind of drug, 2024
- Generic460 claims98%
- Brand-name and other9 claims2%
Dr. Mack'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. Mack's Part D claims, 2024
- Opioids46%217 of 469 claims
- Antibiotics2%11 of 469 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: 3782024: 45119%
Drugs named by CMS: 3 in 2024, 2 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. John B. Mack ranks in the 99th percentile for hernia repair - groin (open) in Medicare
Dr. Mack accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 39 procedures of hernia repair - groin (open) by Dr. Mack, more than 99% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Mack ranks in Medicare procedure volume
- Mastectomy
- 95th percentile55 procedures
- Hernia repair - groin (open)
- 99th percentile39 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Removal of the uterus: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 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)
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Dr. John B. Mack received $765 in industry payments from 2016 to 2025
CMS Open Payments shows 43 general payments to Dr. Mack from 18 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Mallinckrodt LLC paid the most, $119.
General payments to Dr. Mack by program year, 2016 to 2025
Companies that paid Dr. Mack 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. John B. Mack graduated from Baylor College of Medicine
Dr. Mack graduated from Baylor College of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John B. Mack'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)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. John B. Mack
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 B. Mack's NPI number?
Dr. John B. Mack's NPI number is 1801826151. It was assigned on July 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John B. Mack?
Dr. John B. Mack is a general surgeon in Longview, Texas. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John B. Mack practice?
Dr. Mack practices at 2901 N Fourth St, Longview, TX 75605. Dr. Mack's primary practice is Longview Regional Medical Center in Longview, Texas, part of Community Health Systems. Dmand AI also links Dr. Mack to 1 group practice or clinic.
What is Dr. John B. Mack's office phone number?
The practice phone on file for Dr. Mack is (903) 758-1818.
What is Dr. John B. Mack's medical license number?
Dr. Mack holds Texas license H6396.
Which hospitals is Dr. John B. Mack affiliated with?
Dr. Mack practices at Longview Regional Medical Center in Longview, Texas. Dr. Mack is also affiliated with CHRISTUS Good Shepherd Medical Center - Longview.
What medical group is Dr. John B. Mack part of?
Dr. Mack is linked to Diagnostic Clinic of Longview.
Does Dr. John B. Mack accept Medicare?
Yes. CMS data shows Dr. Mack billed Medicare for 686 services in 2024, and Dr. Mack accepts Medicare assignment.
How many Medicare patients does Dr. John B. Mack see?
CMS counts 355 Medicare patients who saw Dr. Mack in 2024, with an average age of 73.
What services does Dr. John B. Mack bill to Medicare?
In 2024, Dr. Mack's most billed Medicare services were office visit, established patient (99213), office visit, new patient (99204) and office visit, established patient (99214).
Show 4 more questionsShow fewer questions
Where did Dr. John B. Mack go to medical school?
Dr. Mack graduated from Baylor College of Medicine in 1987.
What drugs does Dr. John B. Mack prescribe most?
In 2024 Medicare Part D data, Dr. Mack's most prescribed drugs by claims were Ondansetron HCl, Tramadol HCl and Clindamycin HCl.
Has Dr. John B. Mack received payments from drug or device companies?
CMS Open Payments shows $765 in general payments to Dr. Mack from 18 companies from 2016 to 2025. The largest total came from Mallinckrodt LLC.
How long has Dr. John B. Mack been practicing?
Dr. Mack graduated from medical school in 1987, 39 years ago.
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