Dr. Gregory D. Witters, MD
- Medicare services, 2020
- 81
- Part D claims, 2020
- 2,204
- Industry payments
- $2,127
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 4777 Andrew Jackson Parkway, Hermitage, TN 37076
- Practice phone
- Call (615) 889-1599
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ascension Medical Group Saint Thomas - Hermitage (Andrew Jackson Parkway)
Primary care practice · Hermitage, Tennessee
Find Dr. Witters' 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. Gregory D. Witters is a family medicine physician in Tennessee
Dr. Witters practices at Ascension Medical Group Saint Thomas - Hermitage (Andrew Jackson Parkway) in Hermitage, Tennessee.
Dr. Witters' NPI, 1932179389, was assigned on January 26, 2006. Dr. Witters holds Tennessee license MD11350.
- NPI
- 1932179389NPI Registry (opens in a new tab)
- NPI enumeration date
- January 26, 2006
- NPI status
- Active
- Practice phone
- (615) 889-1599
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory D. Witters practices at Ascension Medical Group Saint Thomas - Hermitage (Andrew Jackson Parkway) in Hermitage, Tennessee
Dr. Witters' primary practice is Ascension Medical Group Saint Thomas - Hermitage (Andrew Jackson Parkway), at 4777 Andrew Jackson Parkway, Hermitage, TN 37076. The practice phone is (615) 889-1599.
- Ascension Medical Group Saint Thomas - Hermitage (Andrew Jackson Parkway)4777 Andrew Jackson Parkway, Hermitage, TN 37076Phone(615) 889-1599
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory D. Witters is affiliated with 1 site of care and 1 medical group
Dr. Witters' primary practice is Ascension Medical Group Saint Thomas - Hermitage (Andrew Jackson Parkway) in Hermitage, Tennessee. The medical group on file is Ascension Saint Thomas Medical Partners.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Gregory D. Witters' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Witters practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ascension Medical Group Saint Thomas - Hermitage (Andrew Jackson Parkway) | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory D. Witters is one of 2,430 family medicine physicians in Tennessee
Family medicine is Dr. Witters' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Witters is licensed in Tennessee.
Specialties and state licenses
- Family medicine, TennesseePrimary
Family medicine physicians near Dr. Witters
Counts of family medicine physicians 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. Gregory D. Witters billed Medicare for 81 services in 2020
CMS data shows 81 Medicare services from Dr. Witters across 2 procedure codes in 2020. Medicare paid $2,320 for them. Every service was in an office.
Dr. Witters' Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 6012020: 6589%
- Other services
- 2019: 2492020: 1694%
- Drugs given in the office
- 2019: 442020: 0100%
- Lab and pathology
- 2019: 482020: 0100%
- Tests and treatments
- 2019: 2062020: 0100%
Dr. Witters compared with the Tennessee median for family medicine physicians, 2020
- Dr. Witters
- Tennessee median
- Medicare services
- 81vs 63087% below
- Part D claims
- 2,204vs 1,32267% above
Medians across 2,475 family medicine physicians in Tennessee with Dmand AI profiles that report each measure.
Dr. Witters' most billed Medicare procedure codes, 2020
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. Witters?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Witters and other family medicine physicians in Tennessee.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory D. Witters' patients have a median age of 66
Across all payers, Dmand AI patient panel data puts Dr. Witters' median patient age at 66, with 48% women.
Dr. Witters' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women48%
- Men52%
Source: Dmand AI Patient Panel Data
Dr. Gregory D. Witters wrote 2,204 Medicare Part D claims in 2020
In 2020, Dr. Witters wrote 2,204 Medicare Part D claims. They cover 68 drugs, with $128,675 in total drug cost. In 2019, CMS named 5,429 claims across 112 drugs.
Dr. Witters' 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: 5,4292020: 2,20459%
Drugs named by CMS: 68 in 2020, 112 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gregory D. Witters received $2,127 in industry payments from 2016 to 2019
CMS Open Payments shows 71 general payments to Dr. Witters from 19 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 83% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $395.
General payments to Dr. Witters by program year, 2016 to 2019
General payments to Dr. Witters by kind, 2016 to 2019
- Food and beverage$1,77183%
- Consulting fees$34016%
- Education$161%
Companies that paid Dr. Witters the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gregory D. Witters'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 | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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. Gregory D. Witters
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. Gregory D. Witters' NPI number?
Dr. Gregory D. Witters' NPI number is 1932179389. It was assigned on January 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory D. Witters?
Dr. Gregory D. Witters is a family medicine physician in Tennessee. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Gregory D. Witters practice?
Dr. Witters practices at 4777 Andrew Jackson Parkway, Hermitage, TN 37076. Dr. Witters' primary practice is Ascension Medical Group Saint Thomas - Hermitage (Andrew Jackson Parkway) in Hermitage, Tennessee.
What is Dr. Gregory D. Witters' office phone number?
The practice phone on file for Dr. Witters is (615) 889-1599.
What is Dr. Gregory D. Witters' medical license number?
Dr. Witters holds Tennessee license MD11350.
What medical group is Dr. Gregory D. Witters part of?
Dr. Witters is linked to Ascension Saint Thomas Medical Partners.
Does Dr. Gregory D. Witters accept Medicare?
Yes. CMS data shows Dr. Witters billed Medicare for 81 services in 2020.
What services does Dr. Gregory D. Witters bill to Medicare?
In 2020, Dr. Witters' most billed Medicare services were office visit, established patient (99213) and medicare service (G0439).
What drugs does Dr. Gregory D. Witters prescribe most?
In 2020 Medicare Part D data, Dr. Witters' most prescribed drugs by claims were Levothyroxine Sodium, Lisinopril and Metformin HCl.
Has Dr. Gregory D. Witters received payments from drug or device companies?
CMS Open Payments shows $2,127 in general payments to Dr. Witters from 19 companies from 2016 to 2019. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. Gregory D. Witters been practicing?
Dr. Witters' NPI was assigned in 2006.
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