Mary St.john, M.D.
Psychiatry Physician · Beaufort, SC
Mary St.john, M.D. is a psychiatry physician with a practice address in Beaufort, South Carolina, and NPI 1457553984, issued on Jun 5, 2007. Check the license (South Carolina 9523, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mary St.john
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 9523 SC
Self-reported in NPPES; status is on the state search - Practice location
- 2719 Boundary St, Beaufort, SC 29906
- Phone
- (843) 524-0449
- Enumerated
- Jun 5, 2007
- Record last updated
- Aug 13, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (843) 524-0305
- Medicare enrollment
- Enrolled (PECOS I20130128000347); may accept Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 1978
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 891 in South Carolina → Look up another NPI →
Verify Mary St.john in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 9523Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% fewer Medicare Part D claims than the average psychiatry physician in 2024
816 Medicare Part D claims for 38 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Bupropion Xl91 claims
- Lorazepam80 claims
- Alprazolam61 claims
- Dextroamphetamine-Amphet Er53 claims
- Fluoxetine Hcl53 claims
- Trazodone Hcl48 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.
Mary St.john among 891 psychiatry physician records in South Carolina
Mary St.john, M.D. is one of 891 psychiatry physician records with a practice address in South Carolina. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 37% of them.
- NPI issued2007 · 37% of these records are older, 53% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 41% of these records are
- Graduated1978 · median 2007 among the 365 with a school on file
- Record last updated2012 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 psychiatry physician records list a practice address in Beaufort
They are 15 of the 1,190 NPPES records with a practice address in Beaufort, and 891 psychiatry physician records in South Carolina.
All 891 in South Carolina → Every provider in Beaufort → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Amanda Salas, M.D.Beaufort, SC 299071831128958
- Samuel CollierBeaufort, SC 299041235698663
- Gabriella Inczedy Farkas, MDBluffton, SC 299091669813499
- Carl Brune, MDBeaufort, SC 299021912934191
- Angela Court, M.D.Beaufort, SC 299021760406037
- Richard Ford, M.D.Bluffton, SC 299101235154667
- Max Goulas, MDBeaufort, SC 299021609379916
- Edward Hearn, D.O.Beaufort, SC 299021518220383
Common questions
What is Mary St.john, M.D.'s NPI number?
Mary St.john, M.D.'s National Provider Identifier (NPI) is 1457553984, issued on Jun 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mary St.john, M.D. located?
The NPPES record lists a practice address at 2719 Boundary St, Beaufort, SC, 29906. Phone: (843) 524-0449. Providers update this record themselves, so call before visiting.
How can I verify Mary St.john, M.D.'s license?
NPPES lists South Carolina license number 9523, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary St.john, M.D. prescribe under Medicare Part D?
In 2024, Mary St.john, M.D. had 816 Medicare Part D claims for 38 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.