Dr. James Grant Barr, MD, PhD
- Medicare services, 2019
- 352
- Part D claims, 2020
- 12
- Industry payments
- $1,218
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- 854 W James Campbell Blvd, Columbia, TN 38401-4659
- Practice phone
- Call (931) 388-3209
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Barr'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 Grant Barr is a nephrologist in Columbia, Tennessee
Dr. Barr practices in Columbia, Tennessee.
Dr. Barr's NPI, 1831181957, was assigned on August 16, 2005. Dr. Barr holds Tennessee license 17679.
- NPI
- 1831181957NPI Registry (opens in a new tab)
- NPI enumeration date
- August 16, 2005
- NPI status
- Active
- Practice phone
- (931) 388-3209
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. James Grant Barr's practice address is in Columbia, Tennessee
Dr. Barr's practice address in the NPI Registry is 854 W James Campbell Blvd, Columbia, TN 38401-4659. The practice phone is (931) 388-3209.
- NPI Registry address854 W James Campbell Blvd, Columbia, TN 38401-4659Phone(931) 388-3209
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. James Grant Barr's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Barr practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Barr's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James Grant Barr is one of 230 nephrologists in Tennessee
Nephrology is Dr. Barr's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Barr is licensed in Tennessee.
Specialties and state licenses
- Nephrology, TennesseePrimary
Nephrologists near Dr. Barr
Counts of nephrologists 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 Grant Barr billed Medicare for 352 services in 2019
CMS data shows 352 Medicare services from Dr. Barr across 4 procedure codes in 2019. Medicare paid $31,773 for them. Every service was in an office.
Dr. Barr's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 1,0002019: 23876%
- Tests and treatments
- 2018: 7172019: 11484%
- Imaging
- 2018: 162019: 0100%
Dr. Barr compared with the Tennessee median for nephrologists, 2019
- Dr. Barr
- Tennessee median
- Medicare services
- 352vs 1,18770% below
- Part D claims
- 12vs 85399% below
Medians across 228 nephrologists in Tennessee with Dmand AI profiles that report each measure.
Dr. Barr's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Barr?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Barr and other nephrologists in Tennessee.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Grant Barr's patients have a median age of 69
Across all payers, Dmand AI patient panel data puts Dr. Barr's median patient age at 69, with 46% women.
Dr. Barr's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women46%
- Men54%
Source: Dmand AI Patient Panel Data
Dr. James Grant Barr wrote 12 Medicare Part D claims in 2020
In 2020, Dr. Barr wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $539 in total drug cost. In 2019, CMS named 909 claims across 26 drugs.
Dr. Barr's most prescribed drugs by claims, 2020
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, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 9092020: 1299%
Drugs named by CMS: 1 in 2020, 26 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. James Grant Barr received $1,218 in industry payments from 2016 to 2024
CMS Open Payments shows 64 general payments to Dr. Barr from 11 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $395.
General payments to Dr. Barr by program year, 2016 to 2024
Companies that paid Dr. Barr the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. James Grant Barr'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 |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Grant Barr
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 Grant Barr's NPI number?
Dr. James Grant Barr's NPI number is 1831181957. It was assigned on August 16, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. James Grant Barr?
Dr. James Grant Barr is a nephrologist in Columbia, Tennessee. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. James Grant Barr practice?
Dr. Barr practices at 854 W James Campbell Blvd, Columbia, TN 38401-4659.
What is Dr. James Grant Barr's office phone number?
The practice phone on file for Dr. Barr is (931) 388-3209.
What is Dr. James Grant Barr's medical license number?
Dr. Barr holds Tennessee license 17679.
Does Dr. James Grant Barr accept Medicare?
Yes. CMS data shows Dr. Barr billed Medicare for 352 services in 2019.
What services does Dr. James Grant Barr bill to Medicare?
In 2019, Dr. Barr's most billed Medicare services were office visit, established patient (99214), dialysis (90960) and care management and other visits (99490).
What drugs does Dr. James Grant Barr prescribe most?
In 2020 Medicare Part D data, Dr. Barr's most prescribed drugs by claims were Calcitriol.
Has Dr. James Grant Barr received payments from drug or device companies?
CMS Open Payments shows $1,218 in general payments to Dr. Barr from 11 companies from 2016 to 2024. The largest total came from Amgen Inc.
How long has Dr. James Grant Barr been practicing?
Dr. Barr's NPI was assigned in 2005.
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