Mason Joseph Lee, DO
Family Medicine Physician · Saint Louis, MO
Mason Joseph Lee, DO is a family medicine physician with a practice address in Saint Louis, Missouri, and NPI 1053007955, issued on Apr 13, 2023. Check the license (Missouri 2023019906, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Mason Joseph Lee
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 2023019906 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3630 S Geyer RD Ste 320, Saint Louis, MO 63127
- Phone
- (314) 626-2000
- Enumerated
- Apr 13, 2023
- Record last updated
- Aug 5, 2026
- Fax
- (314) 626-2001
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,991 in Missouri → Look up another NPI →
Also registered at 3630 S Geyer RD Ste 320
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dana Galbraith, M.D.Family Medicine Physician1750589263
- Jack Galbraith, MDFamily Medicine Physician1649373440
Verify Mason Joseph Lee 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 2023019906Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average family medicine physician in 2024
458 Medicare Part D claims for 86 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Most prescribed
- Lisinopril27 claims
- Atorvastatin Calcium24 claims
- Trazodone Hcl21 claims
- Pravastatin Sodium15 claims
- Hydrochlorothiazide14 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.
Mason Joseph Lee among 2,991 family medicine physician records in Missouri
Mason Joseph Lee, DO is one of 2,991 family medicine physician records with a practice address in Missouri. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 94% of them.
- NPI issued2023 · 94% of these records are older, 4% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2026 · 53% 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 Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in Missouri
There are 2,991 family medicine physician records in Missouri.
All 2,991 in Missouri → Every provider in Saint Louis → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Emily Doucette, M.D.Saint Louis, MO 631271487940078
- Kemdi Egekeze, MDSaint Louis, MO 631271609452085
- Jack Galbraith, MDSaint Louis, MO 631271649373440
- Dana Galbraith, M.D.Saint Louis, MO 631271750589263
- Sarah Gebauer, MDSaint Louis, MO 631271225392087
- Dina Helina Fleming, DOSaint Louis, MO 631271053938217
- Priyanka Krishnan, MDSaint Louis, MO 631271700413150
- Kenneth Lee, DOSaint Louis, MO 631271063040574
Common questions
What is Mason Joseph Lee, DO's NPI number?
Mason Joseph Lee, DO's National Provider Identifier (NPI) is 1053007955, issued on Apr 13, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Mason Joseph Lee, DO located?
The NPPES record lists a practice address at 3630 S Geyer RD Ste 320, Saint Louis, MO, 63127. Phone: (314) 626-2000. Providers update this record themselves, so call before visiting.
How can I verify Mason Joseph Lee, DO's license?
NPPES lists Missouri license number 2023019906, 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 Mason Joseph Lee, DO prescribe under Medicare Part D?
In 2024, Mason Joseph Lee, DO had 458 Medicare Part D claims for 86 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.