Gregory Riccardo Vlacich, MD
Radiation Oncology Physician · Saint Louis, MO
Gregory Riccardo Vlacich, MD is a radiation oncology physician with a practice address in Saint Louis, Missouri, and NPI 1073839148, issued on Apr 14, 2010. Check the license (Missouri 2016004564, 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 Riccardo Vlacich
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 2016004564 MO
Self-reported in NPPES; status is on the state search - Practice location
- 4921 Parkview PL, Saint Louis, MO 63110
- Phone
- (314) 747-7236
- Enumerated
- Apr 14, 2010
- Record last updated
- Apr 17, 2025
- Fax
- (314) 362-8099
- Medicaid ID
- 200033688 MO
- Medicare enrollment
- Enrolled (PECOS I20160318000771); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 136 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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- Muyibat Adelani, MDAdult Reconstructive Orthopaedic Surgery Physician1396908042
- Foluso Ademuyiwa, MDMedical Oncology Physician1083875538
- Syed Adil, MDAdult Reconstructive Orthopaedic Surgery Physician1467942953
- Homaa Ahmad, MDCardiovascular Disease Physician1477635092
Verify Gregory Riccardo Vlacich 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 2016004564Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average radiation oncology physician in 2024
87 Medicare Part D claims for 35 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Tamsulosin Hcl31 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: $53.47
2 payments; by number, the most common kind was food and beverage; the largest payer was Sumitomo Pharma America, Inc. The 3,275 providers of this specialty with any payment received $1,897.85 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 2 group practices
- Washington UniversitySaint Louis, MO
- Washington University Physicians IN Illinois IncAlton, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Riccardo Vlacich among 136 radiation oncology physician records in Missouri
Gregory Riccardo Vlacich, MD is one of 136 radiation oncology physician records with a practice address in Missouri. 81% 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 65% of them.
- NPI issued2010 · 65% of these records are older, 29% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2009 · median 2004 among the 96 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 2085R0001X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Missouri
There are 136 radiation oncology physician records in Missouri.
All 136 in Missouri → Every provider in Saint Louis → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Jeffrey Bradley, MDSaint Louis, MO 631101699793232
- Jennifer De Los Santos, MDSaint Louis, MO 631101952344566
- Hiram Gay, MDSaint Louis, MO 631101720045297
- Perry Grigsby, MDSaint Louis, MO 631101467478685
- Dennis Hallahan, MDSaint Louis, MO 631101699867010
- Veena Kunigal, MDSt Louis, MO 631101669443248
- Hsiu-San Lin, MDSaint Louis, MO 631101073531562
- Macdonald Logie, MDSt Louis, MO 631101316967722
Common questions
What is Gregory Riccardo Vlacich, MD's NPI number?
Gregory Riccardo Vlacich, MD's National Provider Identifier (NPI) is 1073839148, issued on Apr 14, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Riccardo Vlacich, MD located?
The NPPES record lists a practice address at 4921 Parkview PL, Saint Louis, MO, 63110. Phone: (314) 747-7236. Providers update this record themselves, so call before visiting.
How can I verify Gregory Riccardo Vlacich, MD's license?
NPPES lists Missouri license number 2016004564, 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 Riccardo Vlacich, MD prescribe under Medicare Part D?
In 2024, Gregory Riccardo Vlacich, MD had 87 Medicare Part D claims for 35 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Gregory Riccardo Vlacich, 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.