Leslie Stewart Massad, MD
Gynecologic Oncology Physician · Saint Louis, MO
Leslie Stewart Massad, MD is a gynecologic oncology physician with a practice address in Saint Louis, Missouri, and NPI 1366423360, issued on Nov 8, 2005. Check the license (Missouri 2007025204, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Leslie Stewart Massad
- Credential
- MD
- Primary taxonomy
- Gynecologic Oncology Physician 207VX0201X
- License number
- 2007025204 MO
Self-reported in NPPES; status is on the state search - Practice location
- 4921 Parkview PL, Saint Louis, MO 63110
- Phone
- (314) 362-3181
- Enumerated
- Nov 8, 2005
- Record last updated
- Apr 17, 2025
- Fax
- (314) 362-2893
- Medicaid ID
- 202889713 MO
- Medicare enrollment
- Enrolled (PECOS I20071031000081); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest gynecologic oncology physician records → All 44 in Missouri → Look up another NPI →
Also registered at 4921 Parkview PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Leslie Stewart Massad in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2007025204Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average gynecologic oncology physician in 2024
119 Medicare Part D claims for 27 beneficiaries, against an average of 195 among the 1,475 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Ondansetron Hcl18 claims
- Prochlorperazine Maleate14 claims
- Dexamethasone13 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): 79.3 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: $2,197.00
2 payments; by number, the most common kind was education; the largest payer was Merck Sharp & Dohme LLC. The 1,199 providers of this specialty with any payment received $6,387.20 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
- Washington UniversitySaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leslie Stewart Massad among 44 gynecologic oncology physician records in Missouri
Leslie Stewart Massad, MD is one of 44 gynecologic oncology physician records with a practice address in Missouri. 86% 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, 89% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1984 · median 2006 among the 32 with a school on file
- Record last updated2025 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VX0201X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gynecologic Oncology Physician providers in Missouri
There are 44 gynecologic oncology physician records in Missouri.
All 44 in Missouri → Every provider in Saint Louis → Gynecologic Oncology Physician nationwide →
The 8 gynecologic oncology physician records with the nearest ZIP codes
- Mostafa EyadaSaint Louis, MO 631101881262822
- Andrea Hagemann, MDSaint Louis, MO 631101285790337
- Dineo Khabele, MDSaint Louis, MO 631101477532240
- Lindsay Kuroki, MDSaint Louis, MO 631101619105202
- Ngoc-Anh Le, MDSaint Louis, MO 631101497496236
- Carolyn McCourt, MDSaint Louis, MO 631101023108966
- Molly Morton, MDSaint Louis, MO 631101427555465
- Mary Mullen, MDSaint Louis, MO 631101437563897
Common questions
What is Leslie Stewart Massad, MD's NPI number?
Leslie Stewart Massad, MD's National Provider Identifier (NPI) is 1366423360, issued on Nov 8, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Leslie Stewart Massad, MD located?
The NPPES record lists a practice address at 4921 Parkview PL, Saint Louis, MO, 63110. Phone: (314) 362-3181. Providers update this record themselves, so call before visiting.
How can I verify Leslie Stewart Massad, MD's license?
NPPES lists Missouri license number 2007025204, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leslie Stewart Massad, MD prescribe under Medicare Part D?
In 2024, Leslie Stewart Massad, MD had 119 Medicare Part D claims for 27 beneficiaries; the average among gynecologic oncology physician prescribers was 195. Part D covers Medicare prescriptions only.
What is Leslie Stewart Massad, MD's MIPS final score?
The 2023 MIPS final score is 79.3 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.