Mary Katherine Johnson, M.D.
Obstetrics & Gynecology Physician · Memphis, TN
Mary Katherine Johnson, M.D. is an obstetrics & gynecology physician with a practice address in Memphis, Tennessee, and NPI 1720309750, issued on Jun 14, 2010. Check the license (Tennessee 50895, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mary Katherine Johnson
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 50895 TN
Self-reported in NPPES; status is on the state search - Practice location
- 6215 Humphreys Blvd, Memphis, TN 38120
- Phone
- (901) 747-1200
- Enumerated
- Jun 14, 2010
- Record last updated
- Oct 16, 2025
- Medicare enrollment
- Enrolled (PECOS I20140728000779); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 815 in Tennessee → Look up another NPI →
Also registered at 6215 Humphreys Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Albritton, MDObstetrics & Gynecology Physician1659307163
- Esmond Arrindell, M.D.Neonatal-Perinatal Medicine Physician1447220306
- John Austin, M.D.Obstetrics & Gynecology Physician1508864737
- Laura Bishop, MDSpecialist1750306858
- Mary Bolfing, M.D.Neonatal-Perinatal Medicine Physician1467643668
- Michael Bronstein, M.D.Specialist1871599316
Verify Mary Katherine Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 50895Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
71 Medicare Part D claims for 28 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol11 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: $984.45
45 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Mid-South OB-Gyn PLLCMemphis, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Katherine Johnson among 815 obstetrics & gynecology physician records in Tennessee
Mary Katherine Johnson, M.D. is one of 815 obstetrics & gynecology physician records with a practice address in Tennessee. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 68% of them.
- NPI issued2010 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2014 · median 2005 among the 522 with a school on file
- Record last updated2025 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Tennessee
There are 815 obstetrics & gynecology physician records in Tennessee.
All 815 in Tennessee → Every provider in Memphis → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- John Austin, M.D.Memphis, TN 381201508864737
- Lea Bannister, MDMemphis, TN 381201922034271
- Judi Carney, M.D.Memphis, TN 381201417953811
- Crista Crisler, MDMemphis, TN 381201588609101
- Mary Giddens, MDMemphis, TN 381201669414025
- Regina Healy, M.D.Memphis, TN 381201508865809
- Riad Homsi, MDMemphis, TN 381201114908639
- Penn Joe, MDMemphis, TN 381201295761203
Common questions
What is Mary Katherine Johnson, M.D.'s NPI number?
Mary Katherine Johnson, M.D.'s National Provider Identifier (NPI) is 1720309750, issued on Jun 14, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mary Katherine Johnson, M.D. located?
The NPPES record lists a practice address at 6215 Humphreys Blvd, Memphis, TN, 38120. Phone: (901) 747-1200. Providers update this record themselves, so call before visiting.
How can I verify Mary Katherine Johnson, M.D.'s license?
NPPES lists Tennessee license number 50895, 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 Mary Katherine Johnson, M.D. prescribe under Medicare Part D?
In 2024, Mary Katherine Johnson, M.D. had 71 Medicare Part D claims for 28 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.