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Dr. Grant Michael Clark, MD
NPI1700029626PAC ID1052557725
- Medicare services, 2024
- 3,050
- Medicare patients, 2024
- 382
- Part D claims, 2024
- 423
- Publications
- 9
- Clinical trials
- 7
- Practice address
- 1901 W Clinch Ave, Knoxville, TN 37916
- Practice phone
- Call (865) 541-1101
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Clark'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. Grant Michael Clark is a radiation oncologist in Knoxville, Tennessee
Dr. Clark practices at Fort Sanders Regional Medical Center in Knoxville, Tennessee, part of Covenant Health.
Dr. Clark's NPI, 1700029626, was assigned on April 7, 2009. Dr. Clark graduated from West Virginia University School of Medicine in 2009. Dr. Clark holds Tennessee license 51020.
NPI and contact details
- NPI
- 1700029626NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1052557725
- NPI enumeration date
- April 7, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (865) 541-1101
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Grant Michael Clark practices at Fort Sanders Regional Medical Center in Knoxville, Tennessee
Dr. Clark's primary practice is Fort Sanders Regional Medical Center, at 1901 W Clinch Ave, Knoxville, TN 37916 in Knox County. The practice phone is (865) 541-1101.
- Fort Sanders Regional Medical Center1901 W Clinch Ave, Knoxville, TN 37916 · Knox CountyPhone(865) 541-1101
Source: Dmand AI Affiliation Data
Dr. Grant Michael Clark is affiliated with 8 sites of care and 2 medical groups
Dr. Clark's primary practice is Fort Sanders Regional Medical Center in Knoxville, Tennessee, part of Covenant Health. Dr. Clark is also affiliated with Covenant Health Parkwest. The medical group on file is Thompson Oncology Group. Dmand AI also links Dr. Clark to 4 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.
Covenant Health ParkwestThompson Oncology Group4 hospitalsNames with a free account2 group practices and clinicsNames with a free account1 medical groupName with a free account
See all 10 affiliations for Dr. ClarkSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Grant Michael Clark's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Clark practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fort Sanders Regional Medical Center | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Grant Michael Clark is one of 120 radiation oncologists in Tennessee
Radiation oncology is Dr. Clark's primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Clark is licensed in Tennessee.
Specialties and state licenses
- Radiation oncology, TennesseePrimary
Radiation oncologists near Dr. Clark
Counts of radiation oncologists 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. Grant Michael Clark billed Medicare for 3,050 services in 2024
CMS data shows 3,050 Medicare services from Dr. Clark across 20 procedure codes in 2024, for 382 Medicare patients. Medicare paid $257,519 for them.
Medicare services, 20243,050
Medicare patients382
Paid by Medicare$257,519
Procedure codes20
Dr. Clark's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 2,6542024: 2,5484%
- Office and hospital visits
- 2023: 5442024: 5028%
Where Dr. Clark's Medicare services took place, 2024
- In an office48616%
- In a facility2,56484%
Dr. Clark compared with the Tennessee median for radiation oncologists, 2024
- Dr. Clark
- Tennessee median
- Medicare services
- 3,050vs 1,73875% above
- Medicare patients
- 382vs 21181% above
- Part D claims
- 331vs 565.9 times
Medians across 113 radiation oncologists in Tennessee with Dmand AI profiles that report each measure.
Dr. Clark'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.
Need commercial claims for Dr. Clark?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Clark and other radiation oncologists in Tennessee.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Grant Michael Clark treated 382 Medicare patients in 2024, average age 74
CMS counts 382 Medicare patients who saw Dr. Clark in 2024. The largest group is 65 to 74, with 194 patients. 75% of them have cancer, and 75% have high blood pressure. 7% are also on Medicaid. Their average risk score is 1.69, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Clark's median patient age at 73, with 54% women.
Medicare patients, 2024382
Average age74
Average risk score1.69
Also on Medicaid7%
Dr. Clark's Medicare patients by age, 2024
Dr. Clark's Medicare patients by sex, 2024
- Women20453%
- Men17847%
Chronic conditions among Dr. Clark's Medicare patients, 2024
- Cancer75%
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Ischemic heart disease40%
- COPD36%
- Diabetes30%
- Anxiety27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Clark's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Grant Michael Clark wrote 423 Medicare Part D claims in 2024
In 2024, Dr. Clark wrote 423 Medicare Part D claims for 174 patients. 94% of them were for generic drugs. CMS names the drug for 331 of them, across 13 drugs with 11 or more claims each, at $5,008 in total drug cost. In 2023, CMS named 390 claims across 14 drugs.
Part D claims, 2024423
Drugs named by CMS13
Total drug cost$5,008
Part D patients174
Dr. Clark's Part D claims by kind of drug, 2024
- Generic398 claims94%
- Brand-name25 claims6%
Dr. Clark'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. Clark's Part D claims, 2024
- Opioids11%46 of 423 claims
- Antibiotics3%11 of 423 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: 3902024: 33115%
Drugs named by CMS: 13 in 2024, 14 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
Dr. Grant Michael Clark scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Clark for performance year 2024, reported as part of a group. Dr. Clark accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Clark's MIPS scores, performance year 2024
- 100of 100Final score
- 100of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Grant Michael Clark has 9 publications on record
Dmand AI links 9 papers to Dr. Clark, published from 2011 to 2023. 2012 was the busiest year, with 2. The most frequent topics are Prostatic Neoplasms, Radiosurgery and Radiotherapy Dosage. Dr. Clark has published most often in Pract Radiat Oncol. Dr. Clark's most frequent co-authors are John B. Fiveash, Barton L. Guthrie, MD and Brendan Michael Prendergast, MD.
Papers9
Years published2011 to 2023
Dr. Clark's papers by year, 2011 to 2023
Topics Dr. Clark writes about most
- Prostatic Neoplasms
- Radiosurgery
- Radiotherapy Dosage
Dr. Clark's most frequent co-authors
- John B. Fiveash6 shared papers
- Barton L. Guthrie, MD3 shared papers
- Brendan Michael Prendergast, MD3 shared papers
Recent publications by Dr. Clark
Dose Fractionation, RadiationDose-Response Relationship, RadiationErectile Dysfunction
See who Dr. Clark researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Clark works with, so you can find a warm path to the right radiation oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Grant Michael Clark has worked on 7 clinical trials
Dmand AI links Dr. Clark to 7 clinical trials, 4 of them phase 3 studies. 5 are still active or recruiting. Conditions studied include Lung Neoplasms, Thoracic Neoplasms and Breast Neoplasms. Alliance for Clinical Trials in Oncology sponsors the most, 2.
Clinical trials with Dr. Clark by phase
- NonePhase 1: no trials
- NonePhase 2: no trials
- 1Phase 2/3: 1 trial
- 4Phase 3: 4 trials
- NonePhase 4: no trials
Conditions in Dr. Clark's trials
- Lung Neoplasms
- Thoracic Neoplasms
- Breast Neoplasms
- Carcinoma, Intraductal, Noninfiltrating
- Fatigue
Investigators on the most trials with Dr. Clark
- Desiree Elaine Doncals, MD4 shared trials
- Samir Narayan, MD4 shared trials
- James H. Taylor, MD4 shared trials
Recent clinical trials with Dr. Clark
Testing the Addition of a New Immunotherapy Drug, Atezolizumab (MPDL3280A), to the Usual Chemoradiation (CRT) Therapy Treatment for Limited Stage Small Cell Lung Cancer (LS-SCLC) (opens in a new tab)
Active, not recruitingPhase 3
Lung NeoplasmsThoracic NeoplasmsAtezolizumabCarboplatinCisplatin
Carcinoma, Intraductal, NoninfiltratingBreast Carcinoma In Situ7-gene biosignature
Stereotactic Body Radiation Therapy or Intensity-Modulated Radiation Therapy in Treating Patients With Stage IIA-B Prostate Cancer (opens in a new tab)
Active, not recruitingPhase 3
Intensity-Modulated Radiation TherapyStereotactic Body Radiation Therapy
Whole-Brain Radiation Therapy With or Without Hippocampal Avoidance in Limited Stage or Extensive Stage Small Cell Lung Cancer (opens in a new tab)
Active, not recruitingPhase 2/3
Intensity-Modulated Radiation TherapyThree-Dimensional Conformal Radiation Therapy
Standard or Comprehensive Radiation Therapy in Treating Patients With Early-Stage Breast Cancer Previously Treated With Chemotherapy and Surgery (opens in a new tab)
Active, not recruiting
Breast NeoplasmsBreast Diseaseschestwall XRTregional nodal XRTWBI
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Grant Michael Clark received $289 in industry payments from 2017 to 2022
CMS Open Payments shows 5 general payments to Dr. Clark from 5 drug and device companies from 2017 to 2022. Food and beverage make up the largest share, 100% of the total. Elekta, Inc. paid the most, $109.
General payments to Dr. Clark by program year, 2017 to 2022
Companies that paid Dr. Clark the most, 2017 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Grant Michael Clark graduated from West Virginia University School of Medicine
Dr. Clark graduated from West Virginia University School of Medicine in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Grant Michael Clark'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 Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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. Grant Michael Clark
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. Grant Michael Clark's NPI number?
Dr. Grant Michael Clark's NPI number is 1700029626. It was assigned on April 7, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Grant Michael Clark?
Dr. Grant Michael Clark is a radiation oncologist in Knoxville, Tennessee. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).
Where does Dr. Grant Michael Clark practice?
Dr. Clark practices at 1901 W Clinch Ave, Knoxville, TN 37916. Dr. Clark's primary practice is Fort Sanders Regional Medical Center in Knoxville, Tennessee, part of Covenant Health. Dmand AI also links Dr. Clark to 4 hospitals, 2 group practices and clinics and 1 medical group.
What is Dr. Grant Michael Clark's office phone number?
The practice phone on file for Dr. Clark is (865) 541-1101.
What is Dr. Grant Michael Clark's medical license number?
Dr. Clark holds Tennessee license 51020.
Which hospitals is Dr. Grant Michael Clark affiliated with?
Dr. Clark practices at Fort Sanders Regional Medical Center in Knoxville, Tennessee. Dr. Clark is also affiliated with Covenant Health Parkwest. Dmand AI links Dr. Clark to 4 more hospitals.
What medical group is Dr. Grant Michael Clark part of?
Dr. Clark is linked to Thompson Oncology Group. Dmand AI links Dr. Clark to 1 more medical group.
Does Dr. Grant Michael Clark accept Medicare?
Yes. CMS data shows Dr. Clark billed Medicare for 3,050 services in 2024, and Dr. Clark accepts Medicare assignment.
What is Dr. Grant Michael Clark's MIPS score?
Dr. Clark's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does Dr. Grant Michael Clark see?
CMS counts 382 Medicare patients who saw Dr. Clark in 2024, with an average age of 74.
Show 7 more questionsShow fewer questions
What services does Dr. Grant Michael Clark bill to Medicare?
In 2024, Dr. Clark's most billed Medicare services were radiation oncology (77014), radiation oncology (77334) and radiation oncology (77300).
Where did Dr. Grant Michael Clark go to medical school?
Dr. Clark graduated from West Virginia University School of Medicine in 2009.
What drugs does Dr. Grant Michael Clark prescribe most?
In 2024 Medicare Part D data, Dr. Clark's most prescribed drugs by claims were Tamsulosin HCl, Dexamethasone and Hydrocodone-Acetaminophen.
Has Dr. Grant Michael Clark received payments from drug or device companies?
CMS Open Payments shows $289 in general payments to Dr. Clark from 5 companies from 2017 to 2022. The largest total came from Elekta, Inc.
How long has Dr. Grant Michael Clark been practicing?
Dr. Clark graduated from medical school in 2009, 17 years ago.
Does Dr. Grant Michael Clark do research?
Dmand AI links 9 publications to Dr. Clark, published from 2011 to 2023. Dr. Clark has worked on 7 clinical trials.
Who does Dr. Grant Michael Clark publish with?
Dr. Clark's most frequent co-authors are John B. Fiveash (6 shared papers), Barton L. Guthrie, MD (3 shared papers) and Brendan Michael Prendergast, MD (3 shared papers).
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