Dr. John E. Marshall, MD
- Medicare services, 2018
- 4,475
- Part D claims, 2024
- 23
- Industry payments
- $380
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 7373 Perkins Rd, Baton Rouge, LA 70808
- Practice phone
- Call (225) 769-4044
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Lsuhn Billing - Baton Rouge (7373 Perkins Rd)
Multi-specialty group site · Baton Rouge, Louisiana
Find Dr. Marshall'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 E. Marshall is a rheumatologist in Baton Rouge, Louisiana
Dr. Marshall practices at Lsuhn Billing - Baton Rouge (7373 Perkins Rd) in Baton Rouge, Louisiana.
Dr. Marshall's NPI, 1811918568, was assigned on July 21, 2006. Dr. Marshall holds Louisiana license 12924R.
- NPI
- 1811918568NPI Registry (opens in a new tab)
- NPI enumeration date
- July 21, 2006
- NPI status
- Active
- Practice phone
- (225) 769-4044
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John E. Marshall practices at Lsuhn Billing - Baton Rouge (7373 Perkins Rd) in Baton Rouge, Louisiana
Dr. Marshall's primary practice is Lsuhn Billing - Baton Rouge (7373 Perkins Rd), at 7373 Perkins Rd, Baton Rouge, LA 70808. The practice phone is (225) 769-4044.
- Lsuhn Billing - Baton Rouge (7373 Perkins Rd)7373 Perkins Rd, Baton Rouge, LA 70808Phone(225) 769-4044
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John E. Marshall is affiliated with 1 site of care and 1 medical group
Dr. Marshall's primary practice is Lsuhn Billing - Baton Rouge (7373 Perkins Rd) in Baton Rouge, Louisiana. The medical group on file is LSU Healthcare Network.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. John E. Marshall's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marshall practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lsuhn Billing - Baton Rouge (7373 Perkins Rd) | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John E. Marshall is one of 81 rheumatologists in Louisiana
Rheumatology is Dr. Marshall's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Marshall is licensed in Louisiana.
Specialties and state licenses
- Rheumatology, LouisianaPrimary
Rheumatologists near Dr. Marshall
Counts of rheumatologists 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 E. Marshall billed Medicare for 4,475 services in 2018
CMS data shows 4,475 Medicare services from Dr. Marshall across 21 procedure codes in 2018. Medicare paid $73,378 for them. Every service was in an office.
Dr. Marshall's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Drugs given in the office
- 2017: 3,2542018: 2,25231%
- Lab and pathology
- 2017: 1,3332018: 1,18411%
- Office and hospital visits
- 2017: 8472018: 61827%
- Surgery
- 2017: 6022018: 40333%
- Tests and treatments
- 2017: 382018: 1853%
- Other services
- 2017: 142018: 0100%
Dr. Marshall compared with the Louisiana median for rheumatologists, 2018
- Dr. Marshall
- Louisiana median
- Medicare services
- 4,475vs 6726.7 times
- Part D claims
- 1,335vs 2,05835% below
Medians across 81 rheumatologists in Louisiana with Dmand AI profiles that report each measure.
Dr. Marshall's most billed Medicare procedure codes, 2018
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 rheumatologists in Louisiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John E. Marshall's patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Dr. Marshall's median patient age at 70, with 72% women.
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 70
Patient panel by sex, all payers
- Women72%
- Men28%
Source: Dmand AI Patient Panel Data
Dr. John E. Marshall wrote 23 Medicare Part D claims in 2024
In 2024, Dr. Marshall wrote 23 Medicare Part D claims. 70% of them were for generic drugs. They cover 39 drugs, with $90,387 in total drug cost. In 2018, CMS named 10,357 claims across 106 drugs.
Dr. Marshall's Part D claims by kind of drug, 2024
- Generic16 claims70%
- Brand-name and other7 claims30%
Dr. Marshall's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 10,3572019: 1,33587%
Drugs named by CMS: 39 in 2019, 106 in 2018.
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
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Dr. John E. Marshall received $380 in industry payments from 2016 to 2018
CMS Open Payments shows 18 general payments to Dr. Marshall from 5 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 86% of the total. West-Ward Pharmaceuticals paid the most, $145.
General payments to Dr. Marshall by program year, 2016 to 2018
General payments to Dr. Marshall by kind, 2016 to 2018
- Food and beverage$32886%
- Education$5214%
Companies that paid Dr. Marshall the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John E. 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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 E. 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. John E. Marshall's NPI number?
Dr. John E. Marshall's NPI number is 1811918568. It was assigned on July 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John E. Marshall?
Dr. John E. Marshall is a rheumatologist in Baton Rouge, Louisiana. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. John E. Marshall practice?
Dr. Marshall practices at 7373 Perkins Rd, Baton Rouge, LA 70808. Dr. Marshall's primary practice is Lsuhn Billing - Baton Rouge (7373 Perkins Rd) in Baton Rouge, Louisiana.
What is Dr. John E. Marshall's office phone number?
The practice phone on file for Dr. Marshall is (225) 769-4044.
What is Dr. John E. Marshall's medical license number?
Dr. Marshall holds Louisiana license 12924R.
What medical group is Dr. John E. Marshall part of?
Dr. Marshall is linked to LSU Healthcare Network.
Does Dr. John E. Marshall accept Medicare?
Yes. CMS data shows Dr. Marshall billed Medicare for 4,475 services in 2018.
What services does Dr. John E. Marshall bill to Medicare?
In 2018, Dr. Marshall's most billed Medicare services were injected or infused drug (J7325), injected or infused drug (J3301) and office visit, established patient (99214).
What drugs does Dr. John E. Marshall prescribe most?
In 2019 Medicare Part D data, Dr. Marshall's most prescribed drugs by claims were Leucovorin Calcium, Hydrocodone-Acetaminophen and Methotrexate.
Has Dr. John E. Marshall received payments from drug or device companies?
CMS Open Payments shows $380 in general payments to Dr. Marshall from 5 companies from 2016 to 2018. The largest total came from West-Ward Pharmaceuticals.
How long has Dr. John E. Marshall been practicing?
Dr. Marshall's NPI was assigned in 2006.
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