Dr. John David Marr, DO
- Medicare services, 2024
- 154
- Medicare patients, 2026
- 131
- Part D claims, 2026
- 44
- Hospital affiliations
- 1
- Industry payments
- $787
- Practice address
- 6100 Harris Pkwy, Fort Worth, TX 76132
- Practice phone
- Call (817) 433-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Marr'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. John David Marr is a general surgeon in Fort Worth, Texas
Dr. Marr practices at Texas Health Southwest Fort Worth in Fort Worth, Texas, part of Texas Health Resources.
Dr. Marr's NPI, 1952898017, was assigned on April 15, 2018. Dr. Marr graduated from Texas College of Osteopathic Medicine in 2018. Dr. Marr holds Texas license U4563.
- NPI
- 1952898017NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3870955982
- NPI enumeration date
- April 15, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (817) 433-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John David Marr practices at Texas Health Southwest Fort Worth in Fort Worth, Texas
Dr. Marr's primary practice is Texas Health Southwest Fort Worth, at 6100 Harris Pkwy, Fort Worth, TX 76132 in Tarrant County. The practice phone is (817) 433-5000.
- Texas Health Southwest Fort Worth6100 Harris Pkwy, Fort Worth, TX 76132 · Tarrant CountyPhone(817) 433-5000
Source: Dmand AI Affiliation Data
Dr. John David Marr is affiliated with 3 sites of care and 2 medical groups
Dr. Marr's primary practice is Texas Health Southwest Fort Worth in Fort Worth, Texas, part of Texas Health Resources. The medical group on file is North Texas Surgical Specialists. Dmand AI also links Dr. Marr to 2 more group practices and clinics and 1 medical group, 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. John David Marr's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marr practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Texas Health Southwest Fort Worth | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John David Marr is one of 1,939 general surgeons in Texas
Surgery is Dr. Marr's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Marr is board certified in 2024 - 2025 by the MD State License. Dr. Marr is licensed in Texas.
Specialties and state licenses
- Surgery, TexasPrimary
General surgeons near Dr. Marr
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 David Marr billed Medicare for 154 services in 2024
CMS data shows 154 Medicare services from Dr. Marr across 6 procedure codes in 2024, for 131 Medicare patients. Medicare paid $13,378 for them.
Dr. Marr's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 192024: 154711%
Where Dr. Marr's Medicare services took place, 2024
- In an office4026%
- In a facility11474%
Dr. Marr compared with the Texas median for general surgeons, 2024
- Dr. Marr
- Texas median
- Medicare services
- 154vs 11831% above
- Medicare patients
- 131vs 9735% above
- Part D claims
- 17vs 4260% below
Medians across 1,674 general surgeons in Texas with Dmand AI profiles that report each measure.
Dr. Marr'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. Marr?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marr 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 David Marr treated 131 Medicare patients in 2026, average age 73
CMS counts 131 Medicare patients who saw Dr. Marr in 2026. The largest group is 65 to 74, with 46 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.73, 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. Marr's median patient age at 59, with 45% women.
Dr. Marr's Medicare patients by age, 2026
Dr. Marr's Medicare patients by sex, 2026
- Women7759%
- Men5441%
Chronic conditions among Dr. Marr's Medicare patients, 2026
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Anxiety48%
- Mood disorders48%
- Depression44%
- Diabetes44%
- Ischemic heart disease43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marr's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women45%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2026 data
Dr. John David Marr wrote 44 Medicare Part D claims in 2026
In 2026, Dr. Marr wrote 44 Medicare Part D claims for 14 patients. 100% of them were for generic drugs. CMS names the drug for 17 of them, across 1 drug with 11 or more claims each, at $64 in total drug cost.
Dr. Marr'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.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2026 data
How Dr. John David Marr takes part in Medicare
Dr. Marr accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 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)
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)
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Dr. John David Marr received $787 in industry payments from 2019 to 2025
CMS Open Payments shows 11 general payments to Dr. Marr from 6 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 52% of the total. Applied Medical Resources Corporation paid the most, $375.
General payments to Dr. Marr by program year, 2019 to 2025
General payments to Dr. Marr by kind, 2019 to 2025
- Food and beverage$41252%
- Consulting fees$37548%
Companies that paid Dr. Marr the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John David Marr graduated from Texas College of Osteopathic Medicine
Dr. Marr graduated from Texas College of Osteopathic Medicine in 2018.
- Medical school
- Board certified in 2024 - 2025
- Board certified in 2023 - 2027
Source: Dmand AI Professional Profile Data
Dr. John David Marr accepts plans from 22 insurance carriers
Dr. Marr is in network with 22 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 14. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Michigan
- CareFirst BlueCross BlueShield
- Cigna
- HCSC
- Alliant Health Plans
- +14 more carriersWith a free account
Plan types Dr. Marr accepts, by number of carriers
- PPO14
- HMO12
- Medicare10
- POS6
- EPO4
- Medicaid2
Source: Dmand AI Insurance Network Data
Sources for Dr. John David Marr'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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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 David Marr
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 David Marr's NPI number?
Dr. John David Marr's NPI number is 1952898017. It was assigned on April 15, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. John David Marr?
Dr. John David Marr is a general surgeon in Fort Worth, Texas. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John David Marr practice?
Dr. Marr practices at 6100 Harris Pkwy, Fort Worth, TX 76132. Dr. Marr's primary practice is Texas Health Southwest Fort Worth in Fort Worth, Texas, part of Texas Health Resources. Dmand AI also links Dr. Marr to 2 group practices and clinics and 1 medical group, and a free account names each one.
What is Dr. John David Marr's office phone number?
The practice phone on file for Dr. Marr is (817) 433-5000. Dmand AI also checks direct phone and mobile numbers, available with a free account.
What is Dr. John David Marr's email address?
Dmand AI checks professional and personal email addresses for Dr. Marr through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. John David Marr's medical license number?
Dr. Marr holds Texas license U4563.
Which hospitals is Dr. John David Marr affiliated with?
Dr. Marr practices at Texas Health Southwest Fort Worth in Fort Worth, Texas.
What medical group is Dr. John David Marr part of?
Dr. Marr is linked to North Texas Surgical Specialists. Dmand AI links Dr. Marr to 1 more medical group, named with a free account.
Who does Dr. John David Marr practice with?
Dmand AI links 31 HCPs to Dr. Marr's primary medical group, 22 of them general surgeons. A free account lists them, with verified contacts.
Does Dr. John David Marr accept Medicare?
Yes. CMS data shows Dr. Marr billed Medicare for 154 services in 2024, and Dr. Marr accepts Medicare assignment.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. John David Marr see?
CMS counts 131 Medicare patients who saw Dr. Marr in 2026, with an average age of 73.
Is Dr. John David Marr board certified?
Yes. Dr. Marr is board certified in 2024 - 2025 by the MD State License.
What services does Dr. John David Marr bill to Medicare?
In 2024, Dr. Marr's most billed Medicare services were office visit, established patient (99213), hospital inpatient care (99232) and hospital inpatient care (99223).
Where did Dr. John David Marr go to medical school?
Dr. Marr graduated from Texas College of Osteopathic Medicine in 2018.
What drugs does Dr. John David Marr prescribe most?
In 2024 Medicare Part D data, Dr. Marr's most prescribed drugs by claims were Pantoprazole Sodium.
Has Dr. John David Marr received payments from drug or device companies?
CMS Open Payments shows $787 in general payments to Dr. Marr from 6 companies from 2019 to 2025. The largest total came from Applied Medical Resources Corporation.
How long has Dr. John David Marr been practicing?
Dr. Marr graduated from medical school in 2018, 8 years ago.
What EHR does Dr. John David Marr's practice use?
Dmand AI tracks the EHR system at Texas Health Southwest Fort Worth and at 2 more sites and 1 medical group. The vendor and product are available with a free Dmand AI account.
What insurance does Dr. John David Marr accept?
Dr. Marr is in network with 22 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 14. Check the plan with the practice before a visit. The full carrier list is available with a free Dmand AI account.
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