Ryan Courtney Fields, MD
Surgical Oncology Physician · Saint Louis, MO
Ryan Courtney Fields, MD is a surgical oncology physician with a practice address in Saint Louis, Missouri, and NPI 1912900440, issued on May 30, 2005. Check the license (Missouri 2004032568, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Ryan Courtney Fields
- Credential
- MD
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License number
- 2004032568 MO
Self-reported in NPPES; status is on the state search - Practice location
- 4500 Forest Park Ave, Saint Louis, MO 63108
- Phone
- (314) 362-2280
- Enumerated
- May 30, 2005
- Record last updated
- Apr 17, 2025
- Fax
- (888) 352-8360
- Medicaid ID
- 208339002 MO
- Medicare enrollment
- Enrolled (PECOS I20250724004124); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 29 in Missouri → Look up another NPI →
Also registered at 4500 Forest Park Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Camille Abboud, MDMedical Oncology Physician1316965320
- Douglas Adkins, MDMedical Oncology Physician1164440616
- Rebecca Aft, MDSurgical Oncology Physician1164440897
- Amber Afzal, MDHematology (Internal Medicine) Physician1831539808
- Caleb Bannister, PHARM. D.Pharmacist1124718283
- Stephanie Bauer, FNPFamily Nurse Practitioner1639285968
Verify Ryan Courtney Fields 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 2004032568Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average surgical oncology physician in 2024
49 Medicare Part D claims for 26 beneficiaries, against an average of 87 among the 1,237 providers of this specialty who prescribed in Part D.
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: $122.95
1 payment: food and beverage; the largest payer was Lilly USA, LLC. The 1,132 providers of this specialty with any payment received $4,224.74 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
- University OF Rochester Surgical AssociatesRochester, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ryan Courtney Fields among 29 surgical oncology physician records in Missouri
Ryan Courtney Fields, MD is one of 29 surgical oncology physician records with a practice address in Missouri. 76% 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, 93% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2003 · median 2006 among the 22 with a school on file
- Record last updated2025 · 24% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in Missouri
There are 29 surgical oncology physician records in Missouri.
All 29 in Missouri → Every provider in Saint Louis → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- Rebecca Aft, MDSaint Louis, MO 631081164440897
- Taylor Brown, MDSaint Louis, MO 631081770875478
- William Gillanders, MDSaint Louis, MO 631081720006364
- Julie Margenthaler, MDSaint Louis, MO 631081750307054
- Fatema Almushawah, M.D.Saint Louis, MO 631101922318989
- Ashton Brooks, MDSaint Louis, MO 631101720473655
- Timothy Eberlein, MDSaint Louis, MO 631101225054455
- Bruce Hall, MDSaint Louis, MO 631101376560839
Common questions
What is Ryan Courtney Fields, MD's NPI number?
Ryan Courtney Fields, MD's National Provider Identifier (NPI) is 1912900440, issued on May 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ryan Courtney Fields, MD located?
The NPPES record lists a practice address at 4500 Forest Park Ave, Saint Louis, MO, 63108. Phone: (314) 362-2280. Providers update this record themselves, so call before visiting.
How can I verify Ryan Courtney Fields, MD's license?
NPPES lists Missouri license number 2004032568, 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 Ryan Courtney Fields, MD prescribe under Medicare Part D?
In 2024, Ryan Courtney Fields, MD had 49 Medicare Part D claims for 26 beneficiaries; the average among surgical oncology physician prescribers was 87. Part D covers Medicare prescriptions only.
What is Ryan Courtney Fields, 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.