Dr. James J. Diffee, MD
- Medicare services, 2024
- 8,130
- Medicare patients, 2024
- 386
- Part D claims, 2024
- 9,808
- Industry payments
- $1,172
- Affiliated sites
- 1
- Practice address
- 2863 Highway 45th Byp, Jackson, TN 38305
- Practice phone
- Call (731) 664-1375
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Jackson Clinic PA
Jackson, Tennessee
Find Dr. Diffee's professional email, personal email and mobile number
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Dr. James J. Diffee is an internist in Jackson, Tennessee
Dr. Diffee practices at Jackson Clinic PA in Jackson, Tennessee.
Dr. Diffee's NPI, 1518952514, was assigned on September 15, 2005. Dr. Diffee graduated from University of Tennessee, Hsc, College of Medicine in 1978. Dr. Diffee holds Tennessee license 11702.
- NPI
- 1518952514NPI Registry (opens in a new tab)
- NPI enumeration date
- September 15, 2005
- NPI status
- Active
- Practice phone
- (731) 664-1375
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. James J. Diffee practices at Jackson Clinic PA in Jackson, Tennessee
Dr. Diffee's primary practice is Jackson Clinic PA, at 2863 Highway 45th Byp, Jackson, TN 38305 in Madison County. The practice phone is (731) 664-1375.
- Jackson Clinic PA2863 Highway 45th Byp, Jackson, TN 38305 · Madison CountyPhone(731) 664-1375
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. James J. Diffee is affiliated with 2 sites of care and 1 medical group
Dr. Diffee's primary practice is Jackson Clinic PA in Jackson, Tennessee. The medical group on file is The Jackson Clinic. Dmand AI also links Dr. Diffee to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. James J. Diffee's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diffee practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Jackson Clinic PA | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James J. Diffee is one of 2,427 internists in Tennessee
Internal medicine is Dr. Diffee's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Diffee is licensed in Tennessee.
Specialties and state licenses
- Internal medicine, TennesseePrimary
Internists near Dr. Diffee
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 J. Diffee billed Medicare for 8,130 services in 2024
CMS data shows 8,130 Medicare services from Dr. Diffee across 40 procedure codes in 2024, for 386 Medicare patients. Medicare paid $230,177 for them. Every service was in an office.
Dr. Diffee's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 3,3292024: 2,66920%
- Lab and pathology
- 2023: 2,2512024: 2,3012%
- Office and hospital visits
- 2023: 1,0442024: 1,0212%
- Other services
- 2023: 8782024: 8932%
- Surgery
- 2023: 8552024: 7987%
- Tests and treatments
- 2023: 3322024: 29910%
- Imaging
- 2023: 872024: 14971%
Dr. Diffee compared with the Tennessee median for internists, 2024
- Dr. Diffee
- Tennessee median
- Medicare services
- 8,130vs 67112.1 times
- Medicare patients
- 386vs 22274% above
- Part D claims
- 9,162vs 33427.4 times
Medians across 2,462 internists in Tennessee with Dmand AI profiles that report each measure.
Dr. Diffee'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. Diffee and other internists in Tennessee.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James J. Diffee treated 386 Medicare patients in 2024, average age 77
CMS counts 386 Medicare patients who saw Dr. Diffee in 2024. The largest group is 75 to 84, with 171 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 0.96, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Diffee's median patient age at 70, with 43% women.
Dr. Diffee's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Diffee's Medicare patients by sex, 2024
- Women19751%
- Men18949%
Chronic conditions among Dr. Diffee's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Chronic kidney disease34%
- Diabetes33%
- Ischemic heart disease26%
- Anxiety25%
- Osteoporosis20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Diffee'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
- Women43%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James J. Diffee wrote 9,808 Medicare Part D claims in 2024
In 2024, Dr. Diffee wrote 9,808 Medicare Part D claims for 503 patients. 88% of them were for generic drugs. CMS names the drug for 9,162 of them, across 134 drugs with 11 or more claims each, at $625,679 in total drug cost. In 2023, CMS named 9,275 claims across 139 drugs.
Dr. Diffee's Part D claims by kind of drug, 2024
- Generic8,656 claims88%
- Brand-name1,092 claims11%
- Other60 claims1%
Dr. Diffee'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. Diffee's Part D claims, 2024
- Opioids2%186 of 9,808 claims
- Antibiotics1%65 of 9,808 claims
- Antipsychotics, patients 65 and over0%27 of 9,808 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: 9,2752024: 9,1621%
Drugs named by CMS: 134 in 2024, 139 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 J. Diffee received $1,172 in industry payments from 2016 to 2023
CMS Open Payments shows 34 general payments to Dr. Diffee from 7 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $459.
General payments to Dr. Diffee by program year, 2016 to 2023
Companies that paid Dr. Diffee the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James J. Diffee graduated from University of Tennessee, Hsc, College of Medicine
Dr. Diffee graduated from University of Tennessee, Hsc, College of Medicine in 1978.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James J. Diffee'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 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) |
| 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 J. Diffee
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 J. Diffee's NPI number?
Dr. James J. Diffee's NPI number is 1518952514. It was assigned on September 15, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. James J. Diffee?
Dr. James J. Diffee is an internist in Jackson, Tennessee. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. James J. Diffee practice?
Dr. Diffee practices at 2863 Highway 45th Byp, Jackson, TN 38305. Dr. Diffee's primary practice is Jackson Clinic PA in Jackson, Tennessee. Dmand AI also links Dr. Diffee to 1 group practice or clinic.
What is Dr. James J. Diffee's office phone number?
The practice phone on file for Dr. Diffee is (731) 664-1375.
What is Dr. James J. Diffee's medical license number?
Dr. Diffee holds Tennessee license 11702.
What medical group is Dr. James J. Diffee part of?
Dr. Diffee is linked to The Jackson Clinic.
Does Dr. James J. Diffee accept Medicare?
Yes. CMS data shows Dr. Diffee billed Medicare for 8,130 services in 2024.
How many Medicare patients does Dr. James J. Diffee see?
CMS counts 386 Medicare patients who saw Dr. Diffee in 2024, with an average age of 77.
What services does Dr. James J. Diffee bill to Medicare?
In 2024, Dr. Diffee's most billed Medicare services were injected or infused drug (J0897), surgery: heart and blood vessels (36415) and office visit, established patient (99214).
Where did Dr. James J. Diffee go to medical school?
Dr. Diffee graduated from University of Tennessee, Hsc, College of Medicine in 1978.
Show 3 more questionsShow fewer questions
What drugs does Dr. James J. Diffee prescribe most?
In 2024 Medicare Part D data, Dr. Diffee's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Metformin HCl.
Has Dr. James J. Diffee received payments from drug or device companies?
CMS Open Payments shows $1,172 in general payments to Dr. Diffee from 7 companies from 2016 to 2023. The largest total came from Amgen Inc.
How long has Dr. James J. Diffee been practicing?
Dr. Diffee graduated from medical school in 1978, 48 years ago.
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