Mark D. Hennessy, M.D.
Maternal & Fetal Medicine Physician · Knoxville, TN
Mark D. Hennessy, M.D. is a maternal & fetal medicine physician with a practice address in Knoxville, Tennessee, and NPI 1194710467, issued on Sep 13, 2005. Check the license (Tennessee MD 23608, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark D. Hennessy
- Credential
- M.D.
- Primary taxonomy
- Maternal & Fetal Medicine Physician 207VM0101X
- License number
- MD 23608 TN
Self-reported in NPPES; status is on the state search - Practice location
- 1924 Alcoa Hwy, Knoxville, TN 37920
- Phone
- (865) 305-8888
- Enumerated
- Sep 13, 2005
- Record last updated
- Oct 28, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (865) 305-2514
- Medicaid ID
- 3069396 TN
- Medicare enrollment
- Enrolled (PECOS I20050223000140); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest maternal & fetal medicine physician records → All 56 in Tennessee → Look up another NPI →
Also registered at 1924 Alcoa Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rochelle Aaser, APRNCritical Care Medicine Nurse Practitioner1306067921
- Wala Abusalah, MDNephrology Physician1578034161
- Bethany Adams, PTAPhysical Therapy Assistant1639891229
- David Adams, M.DAnesthesiology Physician1043211782
- Lally Adams, M.D.Anesthesiology Physician1093962003
- Anna AddisonStudent in an Organized Health Care Education/Training Program1053233346
Verify Mark D. Hennessy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD 23608Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% more Medicare Part D claims than the average maternal & fetal medicine physician in 2024
76 Medicare Part D claims for 13 beneficiaries, against an average of 41 among the 353 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of 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.
Industry payments in 2024: $67.99
4 payments; by number, the most common kind was food and beverage; the largest payer was Organon Llc. The 784 providers of this specialty with any payment received $1,252.61 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.
Bills Medicare through one group practice
- High Risk Obstetrical Consultants, PLLCLa Follette, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark D. Hennessy among 56 maternal & fetal medicine physician records in Tennessee
Mark D. Hennessy, M.D. is one of 56 maternal & fetal medicine physician records with a practice address in Tennessee. 82% 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, 86% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1986 · median 2005 among the 43 with a school on file
- Record last updated2019 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VM0101X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Maternal & Fetal Medicine Physician providers in Tennessee
There are 56 maternal & fetal medicine physician records in Tennessee.
All 56 in Tennessee → Every provider in Knoxville → Maternal & Fetal Medicine Physician nationwide →
The 8 maternal & fetal medicine physician records with the nearest ZIP codes
- Kristina Carter, M.D.Knoxville, TN 379201639337306
- Bobby Howard, M.D.Knoxville, TN 379201144200064
- Ronald Jaekle, M.D.Knoxville, TN 379201992704357
- Jacklyn Locklear, MDKnoxville, TN 379201578123394
- Cecil Nelson, M.D.Knoxville, TN 379201548571540
- Alissa Paudel, M.D.Knoxville, TN 379201528589835
- Callie Reeder, M.D.Knoxville, TN 379201467831396
- Craig Towers, MDKnoxville, TN 379201972601821
Common questions
What is Mark D. Hennessy, M.D.'s NPI number?
Mark D. Hennessy, M.D.'s National Provider Identifier (NPI) is 1194710467, issued on Sep 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark D. Hennessy, M.D. located?
The NPPES record lists a practice address at 1924 Alcoa Hwy, Knoxville, TN, 37920. Phone: (865) 305-8888. Providers update this record themselves, so call before visiting.
How can I verify Mark D. Hennessy, M.D.'s license?
NPPES lists Tennessee license number MD 23608, 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 D. Hennessy, M.D. prescribe under Medicare Part D?
In 2024, Mark D. Hennessy, M.D. had 76 Medicare Part D claims for 13 beneficiaries; the average among maternal & fetal medicine physician prescribers was 41. 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.