Dr. James J Diffee , MD
Internal Medicine โข Jackson, TN
2863 Highway 45 Byp
Jackson, TN 383053618
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. James Diffee is listed in NPPES under Internal Medicine.
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NPI assigned on September 15, 2005; this date does not establish years in practice.
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Published CMS data list 8,130 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- J0897 โ Injection, denosumab, 1 mg: 2,580 service units.
- 36415 โ Insertion of needle into vein for collection of blood sample: 798 service units.
- 99214 โ Established patient outpatient office visit: 744 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 40 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 9,162 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Amlodipine Besylate โ 591 prescription fills, including refills.
- Atorvastatin Calcium โ 441 prescription fills, including refills.
- Metformin Hcl โ 343 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 135 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Jackson, TN (2024, 49 clinicians with data). Median for this group: 1,144. Middle half: 546 to 2,535.
More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Tennessee (2024, 1,611 clinicians with data). Median for this group: 791. Middle half: 360 to 2,030.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 9,538 in 2020 to 8,130 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
2863 Highway 45 Byp
Jackson, TN 383053618
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
386 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $286,871 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $230,180 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
19,775 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$625,679 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $110.87 in 2023
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2023.
NPI first issued
2005
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Diffee has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Diffee as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Jackson and Tennessee
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Jackson, TN (2024, 49 clinicians with data). Median for this group: 1,144. Middle half: 546 to 2,535.
More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Tennessee (2024, 1,611 clinicians with data). Median for this group: 791. Middle half: 360 to 2,030.
Medicare-allowed amount
A higher Medicare-allowed amount than 95% of clinicians listed under Internal Medicine in Jackson, TN (2024, 49 clinicians with data). Median for this group: $83,683. Middle half: $59,016 to $130,356.
A higher Medicare-allowed amount than 95% of clinicians listed under Internal Medicine in Tennessee (2024, 1,611 clinicians with data). Median for this group: $69,187. Middle half: $31,162 to $121,898.
Paid by Medicare
A higher Medicare payment amount than 95% of clinicians listed under Internal Medicine in Jackson, TN (2024, 49 clinicians with data). Median for this group: $68,636. Middle half: $46,079 to $102,186.
A higher Medicare payment amount than 95% of clinicians listed under Internal Medicine in Tennessee (2024, 1,611 clinicians with data). Median for this group: $53,796. Middle half: $24,059 to $94,420.
Medicare Part D prescriptions
More Part D prescriptions than 85% of clinicians listed under Internal Medicine in Jackson, TN (2024, 48 clinicians with data). Median for this group: 318. Middle half: 108 to 4,281.
More Part D prescriptions than 80% of clinicians listed under Internal Medicine in Tennessee (2024, 1,686 clinicians with data). Median for this group: 933. Middle half: 139 to 6,843.
Part D drug cost
A higher Part D drug cost than 85% of clinicians listed under Internal Medicine in Jackson, TN (2024, 48 clinicians with data). Median for this group: $15,339. Middle half: $2,613 to $242,687.
A higher Part D drug cost than 75% of clinicians listed under Internal Medicine in Tennessee (2024, 1,686 clinicians with data). Median for this group: $71,826. Middle half: $7,500 to $530,936.
64 active clinicians are listed under Internal Medicine with a practice address in Jackson, TN (2,599 in Tennessee).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Jackson
4.7% of these 64 clinicians have the CMS telehealth indicator.
76.6% of these 64 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 15% from 9,538 in 2020 to 8,130 in 2024.
- 2020: 9,538
- 2021: 9,337
- 2022: 10,195
- 2023: 8,776
- 2024: 8,130
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Medicare-allowed amount
Medicare-allowed amount stayed about the same: $290,974 in 2020 and $286,871 in 2024.
- 2020: $290,974
- 2021: $303,852
- 2022: $323,221
- 2023: $294,785
- 2024: $286,871
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Paid by Medicare
Paid by Medicare stayed about the same: $231,199 in 2020 and $230,180 in 2024.
- 2020: $231,199
- 2021: $245,185
- 2022: $261,174
- 2023: $234,320
- 2024: $230,180
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 27% from 12,517 in 2020 to 9,162 in 2024.
- 2020: 12,517
- 2021: 11,369
- 2022: 9,944
- 2023: 9,275
- 2024: 9,162
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30-day fills
30-day fills decreased 21% from 25,025 in 2020 to 19,775 in 2024.
- 2020: 25,025
- 2021: 23,612
- 2022: 21,204
- 2023: 20,203
- 2024: 19,775
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Part D drug cost
Part D drug cost decreased 19% from $773,877 in 2020 to $625,679 in 2024.
- 2020: $773,877
- 2021: $810,657
- 2022: $673,616
- 2023: $759,742
- 2024: $625,679
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $245.06 in 2021 to $110.87 in 2023.
- 2021: $245.06
- 2022: $206.49
- 2023: $110.87
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2023), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2023 (payments made January 1 โ December 31, 2023): fewer than 11 records totaling $110.87.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Amgen Inc. |
Food and Beverage
In-kind items and services
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Prolia | General | $110.87 |
Source: CMS Open Payments, program year 2023, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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J0897
Injection, denosumab, 1 mg
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2,580 | 29 | $34.07 | $25.70 |
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36415
Insertion of needle into vein for collection of blood sample
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798 | 356 | $9.09 | $8.04 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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744 | 356 | $216.00 | $121.40 |
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80053
Blood test, comprehensive group of blood chemicals
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577 | 327 | $24.00 | $10.32 |
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80061
Blood test, lipids (cholesterol and triglycerides)
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520 | 296 | $36.00 | $13.10 |
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83036
Hemoglobin a1c level
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293 | 155 | $26.00 | $9.47 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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283 | 283 | $280.00 | $124.94 |
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G0444
Annual depression screening, 5 to 15 minutes
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275 | 275 | $40.00 | $17.97 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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244 | 169 | $147.00 | $86.24 |
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85025
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
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159 | 117 | $21.00 | $7.61 |
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84443
Blood test, thyroid stimulating hormone (tsh)
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152 | 83 | $50.00 | $16.46 |
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90662
Influenza vaccine split virus, preservative free
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143 | 141 | $100.00 | $81.27 |
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G0008
Administration of influenza virus vaccine
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142 | 140 | $60.00 | $29.78 |
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96372
Injection of drug or substance under skin or into muscle
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135 | 42 | $67.00 | $13.52 |
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82043
Urine microalbumin (protein) level
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106 | 92 | $10.00 | $5.66 |
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82570
Creatinine level to test for kidney function or muscle injury
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105 | 92 | $14.00 | $5.08 |
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J3420
Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg
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89 | 13 | $6.00 | $1.26 |
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82306
Vitamin d-3 level
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87 | 73 | $81.00 | $28.68 |
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77080
Dxa bone density measurement of hip, pelvis, spine
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71 | 71 | $185.00 | $35.91 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
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69 | 67 | $35.00 | $15.84 |
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G0103
Prostate cancer screening; prostate specific antigen test (psa)
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50 | 50 | $50.00 | $18.16 |
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G0179
Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a
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46 | 19 | $85.00 | $39.57 |
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80048
Blood test, basic group of blood chemicals (calcium, total)
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42 | 37 | $19.00 | $8.20 |
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81001
Manual urinalysis test with examination using microscope, automated
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42 | 33 | $9.00 | $3.11 |
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71046
X-ray of chest, 2 views
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36 | 32 | $65.78 | $21.07 |
(top 25 shown)
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Amlodipine Besylate | Amlodipine Besylate | 591 | 46,688 | $3,224.32 | 148 |
| Atorvastatin Calcium | Atorvastatin Calcium | 441 | 33,415 | $4,334.01 | 116 |
| Metformin Hcl | Metformin Hcl | 343 | 27,698 | $2,135.99 | 92 |
| Omeprazole | Omeprazole | 319 | 25,413 | $3,783.77 | 86 |
| Lisinopril | Lisinopril | 278 | 19,109 | $1,851.00 | 61 |
| Levothyroxine Sodium | Levothyroxine Sodium | 277 | 18,337 | $2,202.53 | 59 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 263 | 21,786 | $4,119.86 | 77 |
| Alprazolam | Alprazolam | 248 | 7,306 | $1,099.13 | 36 |
| Simvastatin | Simvastatin | 241 | 19,655 | $1,556.50 | 58 |
| Gabapentin | Gabapentin | 202 | 7,023 | $1,382.41 | 31 |
| Hydrochlorothiazide | Hydrochlorothiazide | 196 | 14,500 | $702.09 | 46 |
| Losartan Potassium | Losartan Potassium | 192 | 16,195 | $2,751.00 | 53 |
| Potassium Chloride | Potassium Chloride | 182 | 11,482 | $4,010.15 | 40 |
| Pantoprazole Sodium | Pantoprazole Sodium | 157 | 11,719 | $2,820.62 | 41 |
| Alendronate Sodium | Alendronate Sodium | 149 | 8,895 | $867.96 | 36 |
| Zolpidem Tartrate | Zolpidem Tartrate | 146 | 4,496 | $876.86 | 25 |
| Allopurinol | Allopurinol | 145 | 11,172 | $1,972.72 | 37 |
| Tamsulosin Hcl | Tamsulosin Hcl | 139 | 9,435 | $1,734.73 | 37 |
| Metoprolol Succinate | Metoprolol Succinate | 136 | 10,275 | $2,180.20 | 33 |
| Olmesartan Medoxomil | Olmesartan Medoxomil | 136 | 11,760 | $2,815.15 | 36 |
| Ozempic | Semaglutide | 116 | 4,480 | $144,701.99 | 20 |
| Meloxicam | Meloxicam | 113 | 7,615 | $512.29 | 46 |
| Temazepam | Temazepam | 110 | 3,300 | $1,410.16 | 21 |
| Fluticasone Propionate | Fluticasone Propionate | 108 | 5,606 | $1,327.57 | 33 |
| Benazepril Hcl | Benazepril Hcl | 107 | 6,640 | $725.03 | 21 |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20080722000345
TN
3476626698
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine - Endocrinology, Diabetes & Metabolism
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Gerontology
Advanced Practice Nurse
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated September 15, 2005.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Internal Medicine Providers in Jackson
- Dr. Natasha Mahajan, MD
- Dr. Osayawe Odeh, MD
- Dr. Harold Batson, MD
- Dr. Kelechi Emmanuel, MD
- Dr. Evanna Proctor, MD
- Dr. Khamoshi Patel, DO
Mailing Address
Po Box 400
Jackson, TN 383020400
Phone: 7314238697