Joseph S. Iobst, MD
Hematology & Oncology Physician · Sevierville, TN
Joseph S. Iobst, MD is a hematology & oncology physician with a practice address in Sevierville, Tennessee, and NPI 1366407819, issued on Apr 19, 2006. Check the license (Tennessee 74005, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Joseph S. Iobst
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- 74005 TN
ME102966 FL
0101233360 VA
Self-reported in NPPES; status is on the state search - Practice location
- 740 Middle Creek RD Ste 200, Sevierville, TN 37862
- Phone
- (865) 908-9888
- Enumerated
- Apr 19, 2006
- Record last updated
- Jan 20, 2026
- Medicare enrollment
- Enrolled (PECOS I20260120002742); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 273 in Tennessee → Look up another NPI →
Also registered at 740 Middle Creek RD Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Laura Davidson, M.D.Obstetrics & Gynecology Physician1881778561
- Michael Domina, D.O.Obstetrics & Gynecology Physician1396130613
- Malynda Gibson, FNP-CFamily Nurse Practitioner1104563626
- Mackenzie JonesAdvanced Practice Midwife1114748894
- Dana Laney, FNP-BCObstetrics & Gynecology Nurse Practitioner1801310446
- Haley Reynolds, CNMAdvanced Practice Midwife1801596929
Verify Joseph S. Iobst in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 74005Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
122 Medicare Part D claims for 51 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Estradiol39 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 89.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $44.42
2 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Joseph S. Iobst among 273 hematology & oncology physician records in Tennessee
Joseph S. Iobst, MD is one of 273 hematology & oncology physician records with a practice address in Tennessee. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 53% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated1989 · median 2004 among the 223 with a school on file
- Record last updated2026 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Tennessee
There are 273 hematology & oncology physician records in Tennessee.
All 273 in Tennessee → Every provider in Sevierville → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Feras Abdul Khalek, M.D.Sevierville, TN 378621497079008
- Richard Antonucci, MDPowell, TN 378491841290541
- Yi Feng, MDPowell, TN 378491639179229
- Mitchell Martin, MDPowell, TN 378491639179708
- John Foust, MDOak Ridge, TN 378301205834835
- Catherine Murphree, MDOak Ridge, TN 378301578067286
- Thomas Repine, MDOak Ridge, TN 378301245324938
- Trena Stoute, MDOak Ridge, TN 378301588003719
Common questions
What is Joseph S. Iobst, MD's NPI number?
Joseph S. Iobst, MD's National Provider Identifier (NPI) is 1366407819, issued on Apr 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph S. Iobst, MD located?
The NPPES record lists a practice address at 740 Middle Creek RD Ste 200, Sevierville, TN, 37862. Phone: (865) 908-9888. Providers update this record themselves, so call before visiting.
How can I verify Joseph S. Iobst, MD's license?
NPPES lists Tennessee license number 74005, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joseph S. Iobst, MD prescribe under Medicare Part D?
In 2024, Joseph S. Iobst, MD had 122 Medicare Part D claims for 51 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Joseph S. Iobst, MD's MIPS final score?
The 2023 MIPS final score is 89.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.