Mark Thomas Simpson, M.D.
Family Medicine Physician · Hixson, TN
Mark Thomas Simpson, M.D. is a family medicine physician with a practice address in Hixson, Tennessee, and NPI 1407837891, issued on Nov 11, 2005. Check the license (Tennessee 19467, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark Thomas Simpson
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 19467 TN
Self-reported in NPPES; status is on the state search - Practice location
- 4513 Hixson Pike, Hixson, TN 37343
- Phone
- (423) 298-7071
- Enumerated
- Nov 11, 2005
- Record last updated
- Jun 25, 2024
- Fax
- (423) 877-7901
- Medicare enrollment
- Enrolled (PECOS I20050216000849); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1982
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,674 in Tennessee → Look up another NPI →
Also registered at 4513 Hixson Pike
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Thomas Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 19467Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average family medicine physician in 2024
2,239 Medicare Part D claims for 143 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 169 claims were for opioids.
Most prescribed
- Cephalexin94 claims
- Gabapentin85 claims
- Oxycodone Hcl76 claims
- Alprazolam74 claims
- Azithromycin72 claims
- Amlodipine Besylate69 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.
Mark Thomas Simpson among 2,674 family medicine physician records in Tennessee
Mark Thomas Simpson, M.D. is one of 2,674 family medicine physician records with a practice address in Tennessee. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 83% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1982 · median 2004 among the 1,685 with a school on file
- Record last updated2024 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 family medicine physician records list a practice address in Hixson
They are 25 of the 628 NPPES records with a practice address in Hixson, and 2,674 family medicine physician records in Tennessee.
All 2,674 in Tennessee → Every provider in Hixson → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- David Adams, M.D.Hixson, TN 373431467463299
- Julie Bilbrey, MDHixson, TN 373431609096643
- Brent Campbell, D.O.Hixson, TN 373431285841254
- Elizabeth Close, M.D.Hixson, TN 373431760697734
- Charles Harris, M.D.Hixson, TN 373431972636983
- Julie Haun, MDHixson, TN 373431861487399
- Ronald Jarl, M.D.Hixson, TN 373431457336026
- Maria Martin, M.DHixson, TN 373431467424770
Common questions
What is Mark Thomas Simpson, M.D.'s NPI number?
Mark Thomas Simpson, M.D.'s National Provider Identifier (NPI) is 1407837891, issued on Nov 11, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Thomas Simpson, M.D. located?
The NPPES record lists a practice address at 4513 Hixson Pike, Hixson, TN, 37343. Phone: (423) 298-7071. Providers update this record themselves, so call before visiting.
How can I verify Mark Thomas Simpson, M.D.'s license?
NPPES lists Tennessee license number 19467, 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 Mark Thomas Simpson, M.D. prescribe under Medicare Part D?
In 2024, Mark Thomas Simpson, M.D. had 2,239 Medicare Part D claims for 143 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.