Gregory Peter Cejas, MD
Psychiatry Physician · Saint Louis, MO
Gregory Peter Cejas, MD is a psychiatry physician with a practice address in Saint Louis, Missouri, and NPI 1225558802, issued on Jun 23, 2017. Check the license (Missouri 2019022607, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Gregory Peter Cejas
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 2019022607 MO
Self-reported in NPPES; status is on the state search - Practice location
- 4444 Forest Park Ave, Saint Louis, MO 63108
- Phone
- (314) 286-1700
- Enumerated
- Jun 23, 2017
- Record last updated
- Apr 15, 2025
- Fax
- (314) 286-1730
- Medicaid ID
- 200061871 MO
- Medicare enrollment
- Enrolled (PECOS I20220608001249); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 965 in Missouri → Look up another NPI →
Also registered at 4444 Forest Park Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brooke Anderson, PMHNPChild & Adolescent Psychiatry Physician1033974019
- Marisa Andrews, CGCGenetic Counselor (M.S.)1891231544
- Christina Anozie, MSW, LMSWSocial Worker1902230741
- Camille Antonacci, OTOccupational Therapist1619483153
- Yewande Apatira, DPTPhysical Therapist1932550688
- Katherine Aravamudan, LPCCounselor1720412893
Verify Gregory Peter Cejas 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 2019022607Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average psychiatry physician in 2024
15 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Duloxetine Hcl11 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).
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).
Gregory Peter Cejas among 965 psychiatry physician records in Missouri
Gregory Peter Cejas, MD is one of 965 psychiatry physician records with a practice address in Missouri. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 74% of them.
- NPI issued2017 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 49% of these records are
- Graduated2017 · median 2003 among the 474 with a school on file
- Record last updated2025 · 46% 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 Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Missouri
There are 965 psychiatry physician records in Missouri.
All 965 in Missouri → Every provider in Saint Louis → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Andrea Giedinghagen, MDSaint Louis, MO 631081639519028
- Rushaniya Khairova, MDSaint Louis, MO 631081013243476
- Mary Kimmel, MDSaint Louis, MO 631081194921767
- Donn Kleinschmidt, MDSaint Louis, MO 631081205975182
- Collins Lewis, MDSaint Louis, MO 631081851318364
- Daniel Murray, M.D.Saint Louis, MO 631081902111388
- Akinkunle Owoso, MDSaint Louis, MO 631081063610319
- Daniel Pugh, MDSaint Louis, MO 631081184642506
Common questions
What is Gregory Peter Cejas, MD's NPI number?
Gregory Peter Cejas, MD's National Provider Identifier (NPI) is 1225558802, issued on Jun 23, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Peter Cejas, MD located?
The NPPES record lists a practice address at 4444 Forest Park Ave, Saint Louis, MO, 63108. Phone: (314) 286-1700. Providers update this record themselves, so call before visiting.
How can I verify Gregory Peter Cejas, MD's license?
NPPES lists Missouri license number 2019022607, 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 Gregory Peter Cejas, MD prescribe under Medicare Part D?
In 2024, Gregory Peter Cejas, MD had 15 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
What is Gregory Peter Cejas, 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.