Isham C. Hewgley, III, MD
Internal Medicine Physician · Knoxville, TN
Isham C. Hewgley, III, MD is an internal medicine physician with a practice address in Knoxville, Tennessee, and NPI 1215915921, issued on Jan 3, 2006. Check the license (Tennessee 16850, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Isham C. Hewgley, III
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 16850 TN
Self-reported in NPPES; status is on the state search - Practice location
- 10820 Parkside Dr, Knoxville, TN 37934
- Phone
- (865) 218-7972
- Enumerated
- Jan 3, 2006
- Record last updated
- May 3, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (865) 218-7973
- Medicaid ID
- 3025422 TN
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,596 in Tennessee → Look up another NPI →
Also registered at 10820 Parkside Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amanda Ellis, PAMedical Physician Assistant1689388480
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Verify Isham C. Hewgley, III in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 16850Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
25 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Isham C. Hewgley, III among 2,596 internal medicine physician records in Tennessee
Isham C. Hewgley, III, MD is one of 2,596 internal medicine physician records with a practice address in Tennessee. 80% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 46% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2013 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
237 internal medicine physician records list a practice address in Knoxville
They are 237 of the 14,339 NPPES records with a practice address in Knoxville, and 2,596 internal medicine physician records in Tennessee.
All 2,596 in Tennessee → Every provider in Knoxville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Amy Barnett, MDKnoxville, TN 379341285848408
- Michael Collier, MDKnoxville, TN 379341811933674
- Brian Collier, M.D.Knoxville, TN 379341376619726
- James Davis, MDKnoxville, TN 379341184602898
- Kim Emmett, M.D.Knoxville, TN 379341437174356
- Nathan Gray, MDKnoxville, TN 379341952347999
- Michael Hill, MDKnoxville, TN 379341881634723
- Philippe Leveille, M.D.Knoxville, TN 379341609195924
Common questions
What is Isham C. Hewgley, III, MD's NPI number?
Isham C. Hewgley, III, MD's National Provider Identifier (NPI) is 1215915921, issued on Jan 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Isham C. Hewgley, III, MD located?
The NPPES record lists a practice address at 10820 Parkside Dr, Knoxville, TN, 37934. Phone: (865) 218-7972. Providers update this record themselves, so call before visiting.
How can I verify Isham C. Hewgley, III, MD's license?
NPPES lists Tennessee license number 16850, 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 Isham C. Hewgley, III, MD prescribe under Medicare Part D?
In 2024, Isham C. Hewgley, III, MD had 25 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.