Dr. James Warner Marshall Jr., DO
- Medicare services, 2024
- 925
- Medicare patients, 2024
- 399
- Part D claims, 2024
- 862
- Industry payments
- $1,342
- Affiliated sites
- 3
- Practice address
- 317 Foxon Rd, East Haven, CT 06513
- Practice phone
- Call (203) 529-3271
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
DOCS Urgent Care - East Haven
Urgent Care Center · East Haven, Connecticut
Find Dr. Marshall's professional email, personal email and mobile number
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Dr. James Warner Marshall Jr. is an internist in East Haven, Connecticut
Dr. Marshall practices at DOCS Urgent Care - East Haven in East Haven, Connecticut.
Dr. Marshall's NPI, 1871597310, was assigned on June 13, 2005. Dr. Marshall graduated from University of New England College of Osteopathic Medicine in 1985. Dr. Marshall holds Connecticut license 000204.
- NPI
- 1871597310NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941324610
- NPI enumeration date
- June 13, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 529-3271
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Warner Marshall Jr. practices at DOCS Urgent Care - East Haven in East Haven, Connecticut
Dr. Marshall's primary practice is DOCS Urgent Care - East Haven, at 317 Foxon Rd, East Haven, CT 06513. The practice phone is (203) 529-3271.
- DOCS Urgent Care - East Haven317 Foxon Rd, East Haven, CT 06513Phone(203) 529-3271
Source: Dmand AI Affiliation Data
Dr. James Warner Marshall Jr. is affiliated with 3 sites of care and 2 medical groups
Dr. Marshall's primary practice is DOCS Urgent Care - East Haven in East Haven, Connecticut. The medical group on file is DOCS Medical Group. Dmand AI also links Dr. Marshall 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. James Warner Marshall Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marshall practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| DOCS Urgent Care - East Haven | 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. James Warner Marshall Jr. is one of 2,189 internists in Connecticut
Internal medicine is Dr. Marshall's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Marshall is licensed in Connecticut.
Specialties and state licenses
- Internal medicine, ConnecticutPrimary
Internists near Dr. Marshall
Counts of internists 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. James Warner Marshall Jr. billed Medicare for 925 services in 2024
CMS data shows 925 Medicare services from Dr. Marshall across 12 procedure codes in 2024, for 399 Medicare patients. Medicare paid $55,452 for them. Every service was in an office.
Dr. Marshall's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4012024: 45814%
- Tests and treatments
- 2023: 242024: 194708%
- Other services
- 2023: 392024: 181364%
- Lab and pathology
- 2023: 902024: 6528%
- Surgery
- 2023: 262024: 274%
Dr. Marshall compared with the Connecticut median for internists, 2024
- Dr. Marshall
- Connecticut median
- Medicare services
- 925vs 3902.4 times
- Medicare patients
- 399vs 1722.3 times
- Part D claims
- 635vs 34385% above
Medians across 2,185 internists in Connecticut 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marshall and other internists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Warner Marshall Jr. treated 399 Medicare patients in 2024, average age 72
CMS counts 399 Medicare patients who saw Dr. Marshall in 2024. The largest group is 65 to 74, with 191 patients. 68% of them have high cholesterol, and 64% have high blood pressure. 26% are also on Medicaid. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marshall's median patient age at 58, with 50% women.
Dr. Marshall's Medicare patients by age, 2024
Dr. Marshall's Medicare patients by sex, 2024
- Women24160%
- Men15840%
Chronic conditions among Dr. Marshall's Medicare patients, 2024
- High cholesterol68%
- High blood pressure64%
- Arthritis39%
- Anxiety29%
- Mood disorders26%
- Diabetes25%
- Ischemic heart disease23%
- Depression22%
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 58
Patient panel by sex, all payers
- Women50%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James Warner Marshall Jr. wrote 862 Medicare Part D claims in 2024
In 2024, Dr. Marshall wrote 862 Medicare Part D claims for 253 patients. 96% of them were for generic drugs. CMS names the drug for 635 of them, across 25 drugs with 11 or more claims each, at $3,879 in total drug cost. In 2023, CMS named 174 claims across 9 drugs.
Dr. Marshall's Part D claims by kind of drug, 2024
- Generic826 claims96%
- Brand-name and other36 claims4%
Dr. Marshall'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. Marshall's Part D claims, 2024
- Opioids3%27 of 862 claims
- Antibiotics24%205 of 862 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: 1742024: 635265%
Drugs named by CMS: 25 in 2024, 9 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
How Dr. James Warner Marshall Jr. 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. James Warner Marshall Jr. received $1,342 in industry payments from 2016 to 2025
CMS Open Payments shows 68 general payments to Dr. Marshall from 19 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Pfizer Inc. paid the most, $312.
General payments to Dr. Marshall by program year, 2016 to 2025
General payments to Dr. Marshall by kind, 2016 to 2025
- Food and beverage$1,31798%
- Education$252%
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. James Warner Marshall Jr. graduated from University of New England College of Osteopathic Medicine
Dr. Marshall graduated from University of New England College of Osteopathic Medicine in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James Warner Marshall Jr.'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) |
| 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. James Warner Marshall Jr.
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. James Warner Marshall Jr.'s NPI number?
Dr. James Warner Marshall Jr.'s NPI number is 1871597310. It was assigned on June 13, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. James Warner Marshall Jr.?
Dr. James Warner Marshall Jr. is an internist in East Haven, Connecticut. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. James Warner Marshall Jr. practice?
Dr. Marshall practices at 317 Foxon Rd, East Haven, CT 06513. Dr. Marshall's primary practice is DOCS Urgent Care - East Haven in East Haven, Connecticut. Dmand AI also links Dr. Marshall to 2 group practices and clinics and 1 medical group.
What is Dr. James Warner Marshall Jr.'s office phone number?
The practice phone on file for Dr. Marshall is (203) 529-3271.
What is Dr. James Warner Marshall Jr.'s medical license number?
Dr. Marshall holds Connecticut license 000204.
What medical group is Dr. James Warner Marshall Jr. part of?
Dr. Marshall is linked to DOCS Medical Group. Dmand AI links Dr. Marshall to 1 more medical group.
Does Dr. James Warner Marshall Jr. accept Medicare?
Yes. CMS data shows Dr. Marshall billed Medicare for 925 services in 2024, and Dr. Marshall accepts Medicare assignment.
How many Medicare patients does Dr. James Warner Marshall Jr. see?
CMS counts 399 Medicare patients who saw Dr. Marshall in 2024, with an average age of 72.
What services does Dr. James Warner Marshall Jr. bill to Medicare?
In 2024, Dr. Marshall's most billed Medicare services were office visit, established patient (99213), health assessment (96127) and office visit, new patient (99203).
Where did Dr. James Warner Marshall Jr. go to medical school?
Dr. Marshall graduated from University of New England College of Osteopathic Medicine in 1985.
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What drugs does Dr. James Warner Marshall Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Marshall's most prescribed drugs by claims were Amoxicillin-Clavulanate Potass, Lisinopril and Prednisone.
Has Dr. James Warner Marshall Jr. received payments from drug or device companies?
CMS Open Payments shows $1,342 in general payments to Dr. Marshall from 19 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. James Warner Marshall Jr. been practicing?
Dr. Marshall graduated from medical school in 1985, 41 years ago.
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