Dr. James Clifford Marshall, DO
- Medicare services, 2022
- 126
- Part D claims, 2024
- 52
- Industry payments
- $91
- Affiliated sites
- 1
- Insurance carriers
- 4
- Practice address
- 12600 Seminole Blvd Suite A-3 Suite A-3, Largo, FL 33778
- Practice phone
- Call (727) 585-3610
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
James C. Marshall D.O. F.A.C.C. P.A.
Physician office · Largo, Florida
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. James Clifford Marshall is an internist in Youngstown, Ohio
Dr. Marshall practices at James C. Marshall D.O. F.A.C.C. P.A. in Largo, Florida.
Dr. Marshall's NPI, 1609979228, was assigned on September 7, 2006. Dr. Marshall graduated from New York Institute of Technology College of Osteopathic Medicine - Old Westbury in 1982. Dr. Marshall holds Florida license OS6394.
- NPI
- 1609979228NPI Registry (opens in a new tab)
- NPI enumeration date
- September 7, 2006
- NPI status
- Active
- Practice phone
- (727) 585-3610
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. James Clifford Marshall practices in Largo and Youngstown
Dr. Marshall's primary practice is James C. Marshall D.O. F.A.C.C. P.A., at 12600 Seminole Blvd Suite A-3 Suite A-3, Largo, FL 33778. The practice phone is (727) 585-3610. The NPI Registry lists Dr. Marshall's practice address as 8401 Market St, Youngstown, OH 44512.
- James C. Marshall D.O. F.A.C.C. P.A.Primary12600 Seminole Blvd Suite A-3 Suite A-3, Largo, FL 33778Phone(727) 585-3610
- NPI Registry address8401 Market St, Youngstown, OH 44512 · Mahoning CountyPhone(727) 585-3610
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. James Clifford Marshall is affiliated with 1 site of care
Dr. Marshall's primary practice is James C. Marshall D.O. F.A.C.C. P.A. in Largo, Florida.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. James Clifford 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 |
|---|---|
| James C. Marshall D.O. F.A.C.C. P.A. | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James Clifford Marshall is one of 4,708 internists in Ohio
Internal medicine is Dr. Marshall's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Marshall is board certified in cardiovascular disease by the American Board of Internal Medicine. Dmand AI has Dr. Marshall's licenses on file in 2 states: Florida and Wisconsin.
Specialties and state licenses
- Internal medicine, FloridaPrimary
- Cardiovascular disease, Wisconsin
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 Clifford Marshall billed Medicare for 126 services in 2022
CMS data shows 126 Medicare services from Dr. Marshall across 3 procedure codes in 2022. Medicare paid $5,222 for them. Every service was in an office.
Dr. Marshall's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 872022: 7316%
- Tests and treatments
- 2021: 1162022: 5354%
Dr. Marshall compared with the Ohio median for internists, 2022
- Dr. Marshall
- Ohio median
- Medicare services
- 126vs 48774% below
- Part D claims
- 14vs 29495% below
Medians across 4,703 internists in Ohio with Dmand AI profiles that report each measure.
Dr. Marshall's most billed Medicare procedure codes, 2022
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 Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Clifford Marshall's patients have a median age of 85
Across all payers, Dmand AI patient panel data puts Dr. Marshall's median patient age at 85, with 100% 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 85
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. James Clifford Marshall wrote 52 Medicare Part D claims in 2024
In 2024, Dr. Marshall wrote 52 Medicare Part D claims for 13 patients. 69% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $17,050 in total drug cost. In 2023, CMS named 40 claims across 2 drugs.
Dr. Marshall's Part D claims by kind of drug, 2024
- Generic36 claims69%
- Brand-name16 claims31%
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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 402024: 1465%
Drugs named by CMS: 1 in 2024, 2 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
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Dr. James Clifford Marshall received $91 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Marshall from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $91.
Companies that paid Dr. Marshall the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James Clifford Marshall has 1 award and honors on record
Dmand AI lists 1 award for Dr. Marshall.
Awards and honors for Dr. Marshall
- Undated
- ACC Fellow
Source: Dmand AI Professional Profile Data
Dr. James Clifford Marshall graduated from New York Institute of Technology College of Osteopathic Medicine - Old Westbury
Dr. Marshall graduated from New York Institute of Technology College of Osteopathic Medicine - Old Westbury in 1982. Dr. Marshall is a member of ACC.
- Medical school
- Board certified in cardiovascular disease
- Board certified in internal medicine
- Board certified in 1992 - 2026
- Board certified in 1984 - 1993
- Board certified in 1989 - 2026
- Board certified in 2020 - 2025
- Board certified in 1990 - 1994
Source: Dmand AI Professional Profile Data
Dr. James Clifford Marshall accepts plans from 4 insurance carriers
Dr. Marshall is in network with 4 carriers, including Excellus BlueCross BlueShield, Humana and HCSC. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Excellus BlueCross BlueShield
- Humana
- HCSC
- RI State Medicaid
Plan types Dr. Marshall accepts, by number of carriers
- Medicare3
- PPO3
- HMO2
- EPO1
- Medicaid1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. James Clifford 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation 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 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. James Clifford 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. James Clifford Marshall's NPI number?
Dr. James Clifford Marshall's NPI number is 1609979228. It was assigned on September 7, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James Clifford Marshall?
Dr. James Clifford Marshall is an internist in Youngstown, Ohio. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. James Clifford Marshall practice?
Dr. Marshall practices at 12600 Seminole Blvd Suite A-3 Suite A-3, Largo, FL 33778. Dr. Marshall also practices at 8401 Market St, Youngstown, OH 44512. Dr. Marshall's primary practice is James C. Marshall D.O. F.A.C.C. P.A. in Largo, Florida.
What is Dr. James Clifford Marshall's office phone number?
The practice phone on file for Dr. Marshall is (727) 585-3610.
What is Dr. James Clifford Marshall's medical license number?
Dr. Marshall holds Florida license OS6394, one of the licenses on file in 2 states.
Which states has Dr. James Clifford Marshall been licensed in?
Dmand AI has state licenses on file for Dr. Marshall in Florida and Wisconsin.
Does Dr. James Clifford Marshall accept Medicare?
Yes. CMS data shows Dr. Marshall billed Medicare for 126 services in 2022.
Is Dr. James Clifford Marshall board certified?
Yes. Dr. Marshall is board certified in cardiovascular disease by the American Board of Internal Medicine.
What services does Dr. James Clifford Marshall bill to Medicare?
In 2022, Dr. Marshall's most billed Medicare services were office visit, established patient (99213), heart test or procedure (93000) and office visit, established patient (99214).
Where did Dr. James Clifford Marshall go to medical school?
Dr. Marshall graduated from New York Institute of Technology College of Osteopathic Medicine - Old Westbury in 1982.
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What drugs does Dr. James Clifford Marshall prescribe most?
In 2024 Medicare Part D data, Dr. Marshall's most prescribed drugs by claims were Eliquis.
Has Dr. James Clifford Marshall received payments from drug or device companies?
CMS Open Payments shows $91 in general payments to Dr. Marshall from 1 company from 2016 to 2016. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. James Clifford Marshall been practicing?
Dr. Marshall graduated from medical school in 1982, 44 years ago.
What insurance does Dr. James Clifford Marshall accept?
Dr. Marshall is in network with 4 carriers, including Excellus BlueCross BlueShield, Humana and HCSC. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
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