Dr. Thomas Nathaniel Marshall, MD
- Medicare services, 2024
- 393
- Medicare patients, 2024
- 540
- Hospital affiliations
- 2
- Industry payments
- $248
- Medical groups
- 4
- Practice address
- 1701 Oak Park Blvd, Lake Charles, LA 70601
- Practice phone
- Call (337) 494-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Thomas Nathaniel Marshall is an anesthesiologist in Lake Charles, Louisiana
Dr. Marshall practices at Lake Charles Memorial Hospital in Lake Charles, Louisiana, part of Lake Charles Memorial Health System.
Dr. Marshall's NPI, 1891087367, was assigned on May 3, 2011. Dr. Marshall graduated from Louisiana State University School of Medicine in Shreveport in 2011. Dr. Marshall holds Louisiana license MD.207582.
- NPI
- 1891087367NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092939223
- NPI enumeration date
- May 3, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (337) 494-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Nathaniel Marshall practices at Lake Charles Memorial Hospital in Lake Charles, Louisiana
Dr. Marshall's primary practice is Lake Charles Memorial Hospital, at 1701 Oak Park Blvd, Lake Charles, LA 70601 in Calcasieu Parish. The practice phone is (337) 494-3000.
- Lake Charles Memorial Hospital1701 Oak Park Blvd, Lake Charles, LA 70601 · Calcasieu ParishPhone(337) 494-3000
Source: Dmand AI Affiliation Data
Dr. Thomas Nathaniel Marshall is affiliated with 2 sites of care and 4 medical groups
Dr. Marshall's primary practice is Lake Charles Memorial Hospital in Lake Charles, Louisiana, part of Lake Charles Memorial Health System. Dr. Marshall is also affiliated with Beauregard Health System. The medical group on file is Ochsner Health. Dmand AI also links Dr. Marshall to 3 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. Thomas Nathaniel Marshall's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marshall practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lake Charles Memorial Hospital | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Lake Charles Memorial Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Thomas Nathaniel Marshall is one of 496 anesthesiologists in Louisiana
Anesthesiology is Dr. Marshall's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Marshall is licensed in Louisiana.
Specialties and state licenses
- Anesthesiology, LouisianaPrimary
Anesthesiologists near Dr. Marshall
Counts of anesthesiologists 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. Thomas Nathaniel Marshall billed Medicare for 393 services in 2024
CMS data shows 393 Medicare services from Dr. Marshall across 10 procedure codes in 2024, for 540 Medicare patients. Medicare paid $19,798 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Marshall's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 2622024: 35937%
- Surgery
- 2023: 112024: 34209%
Dr. Marshall compared with the Louisiana median for anesthesiologists, 2024
- Dr. Marshall
- Louisiana median
- Medicare services
- 393vs 527.6 times
- Medicare patients
- 540vs 876.2 times
Medians across 483 anesthesiologists in Louisiana with Dmand AI profiles that report each measure.
Dr. Marshall'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. Marshall?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marshall and other anesthesiologists in Louisiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Nathaniel Marshall treated 540 Medicare patients in 2024, average age 73
CMS counts 540 Medicare patients who saw Dr. Marshall in 2024. The largest group is 65 to 74, with 278 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 15% are also on Medicaid. Their average risk score is 1.40, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marshall's median patient age at 65, with 57% women.
Dr. Marshall's Medicare patients by age, 2024
Dr. Marshall's Medicare patients by sex, 2024
- Women29755%
- Men24345%
Chronic conditions among Dr. Marshall's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Diabetes41%
- Ischemic heart disease36%
- Anxiety33%
- Chronic kidney disease32%
- Mood disorders30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marshall's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Thomas Nathaniel Marshall takes part in Medicare
Dr. Marshall accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Thomas Nathaniel Marshall received $248 in industry payments from 2016 to 2025
CMS Open Payments shows 8 general payments to Dr. Marshall from 6 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. St. Jude Medical, Inc. paid the most, $100.
General payments to Dr. Marshall by program year, 2016 to 2025
Companies that paid Dr. Marshall 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. Thomas Nathaniel Marshall graduated from Louisiana State University School of Medicine in Shreveport
Dr. Marshall graduated from Louisiana State University School of Medicine in Shreveport in 2011.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas Nathaniel Marshall'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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. Thomas Nathaniel Marshall
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. Thomas Nathaniel Marshall's NPI number?
Dr. Thomas Nathaniel Marshall's NPI number is 1891087367. It was assigned on May 3, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Nathaniel Marshall?
Dr. Thomas Nathaniel Marshall is an anesthesiologist in Lake Charles, Louisiana. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Thomas Nathaniel Marshall practice?
Dr. Marshall practices at 1701 Oak Park Blvd, Lake Charles, LA 70601. Dr. Marshall's primary practice is Lake Charles Memorial Hospital in Lake Charles, Louisiana, part of Lake Charles Memorial Health System. Dmand AI also links Dr. Marshall to 3 medical groups.
What is Dr. Thomas Nathaniel Marshall's office phone number?
The practice phone on file for Dr. Marshall is (337) 494-3000.
What is Dr. Thomas Nathaniel Marshall's medical license number?
Dr. Marshall holds Louisiana license MD.207582.
Which hospitals is Dr. Thomas Nathaniel Marshall affiliated with?
Dr. Marshall practices at Lake Charles Memorial Hospital in Lake Charles, Louisiana. Dr. Marshall is also affiliated with Beauregard Health System.
What medical group is Dr. Thomas Nathaniel Marshall part of?
Dr. Marshall is linked to Ochsner Health. Dmand AI links Dr. Marshall to 3 more medical groups.
Does Dr. Thomas Nathaniel Marshall accept Medicare?
Yes. CMS data shows Dr. Marshall billed Medicare for 393 services in 2024, and Dr. Marshall accepts Medicare assignment.
How many Medicare patients does Dr. Thomas Nathaniel Marshall see?
CMS counts 540 Medicare patients who saw Dr. Marshall in 2024, with an average age of 73.
What services does Dr. Thomas Nathaniel Marshall bill to Medicare?
In 2024, Dr. Marshall's most billed Medicare services were anesthesia (00813), anesthesia (00731) and anesthesia (00812).
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Where did Dr. Thomas Nathaniel Marshall go to medical school?
Dr. Marshall graduated from Louisiana State University School of Medicine in Shreveport in 2011.
Has Dr. Thomas Nathaniel Marshall received payments from drug or device companies?
CMS Open Payments shows $248 in general payments to Dr. Marshall from 6 companies from 2016 to 2025. The largest total came from St. Jude Medical, Inc.
How long has Dr. Thomas Nathaniel Marshall been practicing?
Dr. Marshall graduated from medical school in 2011, 15 years ago.
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