James Warner Marshall, D.O.
Internal Medicine Physician · Orange, CT
James Warner Marshall, D.O. is an internal medicine physician with a practice address in Orange, Connecticut, and NPI 1871597310, issued on Jun 13, 2005. Check the license (Connecticut 000204, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- James Warner Marshall
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 000204 CT
Self-reported in NPPES; status is on the state search - Practice location
- 521 Boston Post RD, Orange, CT 06477
- Phone
- (203) 529-3271
- Enumerated
- Jun 13, 2005
- Record last updated
- Jul 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (203) 529-3273
- Medicare enrollment
- Enrolled (PECOS I20100901000844); accepts Medicare assignment
- Medical or professional school
- Univ Of New England, College Of Dental Medicine, 1985
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 521 Boston Post RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew PennacchiaPhysician Assistant1982287538
- Mikaela PerrelliPhysician Assistant1992376503
- Rebecca ProcaMedical Physician Assistant1891460663
Verify James Warner Marshall in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 000204Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average internal medicine physician in 2024
862 Medicare Part D claims for 253 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 27 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass59 claims
- Lisinopril54 claims
- Prednisone44 claims
- Metformin Hcl39 claims
- Atorvastatin Calcium36 claims
- Bupropion Xl35 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $89.75
4 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- CT Medical Group Inc.Orange, CT
- Docs Medical IncOrange, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Warner Marshall among 2,623 internal medicine physician records in Connecticut
James Warner Marshall, D.O. is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 89% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1985 · median 2004 among the 1,646 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 internal medicine physician records list a practice address in Orange
They are 8 of the 378 NPPES records with a practice address in Orange, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Orange → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Abisola Afolalu, MDOrange, CT 064771992847644
- Thelma Batiancila, MDOrange, CT 064771922103365
- Nasiha FahmiOrange, CT 064771629113980
- Attilio Granata, MD, MBA, FACPOrange, CT 064771831305226
- Hannah Hill, MDOrange, CT 064771477041093
- Gordon Hill, MDOrange, CT 064771316563380
- David Kaminsky, MDOrange, CT 064771710924865
- Steven Herzig, MDOxford, CT 064781215953963
Common questions
What is James Warner Marshall, D.O.'s NPI number?
James Warner Marshall, D.O.'s National Provider Identifier (NPI) is 1871597310, issued on Jun 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is James Warner Marshall, D.O. located?
The NPPES record lists a practice address at 521 Boston Post RD, Orange, CT, 06477. Phone: (203) 529-3271. Providers update this record themselves, so call before visiting.
How can I verify James Warner Marshall, D.O.'s license?
NPPES lists Connecticut license number 000204, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Warner Marshall, D.O. prescribe under Medicare Part D?
In 2024, James Warner Marshall, D.O. had 862 Medicare Part D claims for 253 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.