1. Home
  2. Directory
  3. Missouri
  4. Saint Louis
  5. Surgery
  6. NPI Profile

DR. RYAN COURTNEY FIELDS MD
NPI 1912900440
Surgery - Surgical Oncology in Saint Louis, MO

Active since May 30, 2005PECOS EnrolledAccepts Medicare Assignment
79.29/100
CMS Quality Rating
4500 FOREST PARK AVE, DIV SURG HPB, 5TH FL, SAINT LOUIS, MO 63108(314) 362-2280(888) 352-8360 Get Directions Write a Review

NPPES record last updated: April 17, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 25, 2024, Apr 10, 2024, Feb 8, 2023 and 3 more (6 updates tracked since 2016).

About Dr. Ryan Courtney Fields Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. RYAN COURTNEY FIELDS MD (NPI 1912900440) is an individual surgical oncology provider in Saint Louis, Missouri, licensed in Missouri (2004032568) and active in the NPI registry since May 2005. He is enrolled in Medicare PECOS, is affiliated with Barnes Jewish Hospital, and is a graduate of Other (2003).

NPPES Registry Identity

NPI1912900440
Entity TypeIndividualMale
Primary Taxonomy2086X0206X
Provider Legal NameDR. RYAN COURTNEY FIELDSCredential: MD
Location Address4500 FOREST PARK AVE, DIV SURG HPB, 5TH FLSaint Louis, MO 63108-2114
Mailing AddressPo Box 7412011Chicago, IL 60674-2011 · (314) 362-2280 · Fax (888) 352-8360
Phone(314) 362-2280
Fax(888) 352-8360
Sole ProprietorNo
Medical School CMSOtherGraduated 2003
Enumeration DateMay 30, 2005
Last NPPES UpdateApril 17, 20256 updates tracked since enumeration
✔ NPI 1912900440 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgery · Surgical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2086X0206X
License✔ Licensed in MO · 2004032568
Definition
A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research.
Also ListedSurgeryTaxonomy 208600000X · License 2004032568 (MO)
4500 FOREST PARK AVE, Saint Louis, MO 63108
Open in Google Maps ↗

Other Identifiers 1

Medicaid208339002MO

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Ryan Courtney Fields Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4284652447
PECOS Enrollment IDI20250724004124
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 10

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
63 services60 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
58 services58 patients
Removal of cancer skin growth of body, arms, or legs, more than 4.0 cm 11606
This procedure involves surgically removing a cancerous skin growth larger than 4.0 cm on your body, arms, or legs. It's a crucial step in preventing the spread of cancer. Local anesthesia is typically used, and recovery time varies. It's a common and safe procedure.
31 services29 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
19 services18 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
19 services17 patients
Imaging of lymph nodes during surgery 38900
Imaging of lymph nodes during surgery involves taking detailed pictures of your lymph nodes to help surgeons see and assess them in real-time. This procedure can aid in detecting disease, guiding treatment, and improving surgical precision.
18 services18 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Barnes Jewish Hospital

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number260032
LocationOne Barnes-Jewish Hospital PlazaSaint Louis, MO 63110 · St. Louis City County
Emergency services Birthing friendly

Barnes-Jewish West County Hospital

Acute Care Hospitals · Creve Coeur, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260162
Location12634 Olive BoulevardCreve Coeur, MO 63141 · St. Louis County
Emergency services

Strong Memorial Hospital

Acute Care Hospitals · Rochester, NY
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330285
Location601 Elmwood AveRochester, NY 14642 · Monroe County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63108 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$169.38 typical visit price
range $55.65 – $169.38
Typical copayment $42.34 (range $13.91 – $42.34)
Most-billed visit code 99205
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

79.29/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality71.46
Promoting Interoperability100
Improvement Activities40
Cost59.51

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Parenteral nutrition solution, not otherwise specified, 10 grams lipids B4185
Other-Enteral and Parenteral · category OB005N
1 supplier33 claims400 services$11.33 avg. paid by Medicare
Parenteral nutrition solution; compounded amino acid and carbohydrates with electrolytes, trace elements, and vitamins, including preparation, any strength, 52 to 73 grams of protein - premix B4193
Other-Enteral and Parenteral · category OB005N
1 supplier24 claims159 services$230.66 avg. paid by Medicare
Parenteral nutrition supply kit; premix, per day B4220
Other-Enteral and Parenteral · category OB005N
1 supplier23 claims155 services$8.04 avg. paid by Medicare
Parenteral nutrition administration kit, per day B4224
Other-Enteral and Parenteral · category OB005N
1 supplier33 claims198 services$25.17 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. KIM M FRENCH ANP
Nurse Practitioner
4500 FOREST PARK AVE, DIV IM HEMATOLOGY, 6TH FL
SAINT LOUIS, MO 63108
St. Louis City (314) 362-7216
DR. RAVI VIJ MD
Internal Medicine (Medical Oncology)
4500 FOREST PARK AVE, DIV IM BONE MARROW TRANSPLANT, 5TH, 6TH, 8TH FL
SAINT LOUIS, MO 63108
St. Louis City (314) 454-8304
MR. STEVEN CHARLES FUCHS JR. PHARM.D.
Pharmacist
4500 FOREST PARK AVE
SAINT LOUIS, MO 63108
St. Louis City (314) 657-9013
MS. MEGAN ELIZABETH NEUDECKER FNP
Nurse Practitioner (Family)
4500 FOREST PARK AVE, DIV SURG ONCOLOGY, 5TH FL
SAINT LOUIS, MO 63108
St. Louis City (314) 362-2280
MS. CATHERINE C ROGERS ANP
Nurse Practitioner (Adult Health)
4500 FOREST PARK AVE, DIV IM HEMATOLOGY, 6TH FL
SAINT LOUIS, MO 63108
St. Louis City (314) 362-7216
DR. ZEYNEP GUL MD
Urology
4500 FOREST PARK AVE, DIV SURG UROLOGY, 5TH FL
SAINT LOUIS, MO 63108
St. Louis City (314) 362-8200
MS. STEPHANIE ANNE VOLLMER ANP
Nurse Practitioner
4500 FOREST PARK AVE, DIV IM BONE MARROW TRANSPLANT, 5TH, 6TH, 8TH FL
SAINT LOUIS, MO 63108
St. Louis City (314) 454-8304
MS. KAYLA THERESE JARRETT PA
Physician Assistant
4500 FOREST PARK AVE, DEPT NEUROLOGICAL SURGERY, STE 1B
SAINT LOUIS, MO 63108
St. Louis City (314) 362-3577

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ryan Fields's NPI number?

The NPI number for Ryan Fields is 1912900440. It was assigned to this individual provider in the NPPES registry on May 30, 2005.

Where is Ryan Fields located?

Ryan Fields practices at 4500 Forest Park Ave Div Surg Hpb, 5th Fl, Saint Louis, MO 63108. The listed phone number is (314) 362-2280.

What is Ryan Fields's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Surgical Oncology, with taxonomy code 2086X0206X.

Is Ryan Fields enrolled in Medicare?

Yes. Ryan Fields is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Ryan Fields affiliated with any hospitals?

According to CMS data, Ryan Fields is affiliated with Barnes Jewish Hospital, Barnes-Jewish West County Hospital and Strong Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Ryan Fields was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.