DR. RONALD ERNEST FIELDS MD
NPI 1962498196
Internal Medicine - Critical Care Medicine in Baton Rouge, LA

Q: What is Ronald Fields's NPI number?

The NPI number for Ronald Fields is 1962498196. It was assigned to this individual provider in the NPPES registry on September 22, 2005.

Q: What is Ronald Fields's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Q: When was this NPI record last updated?

The NPPES record for Ronald Fields was last updated on December 28, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.

Active since September 22, 2005PECOS EnrolledAccepts Medicare Assignment

7777 HENNESSY BLVD STE 701, BATON ROUGE, LA 70808(225) 765-5864(225) 765-2013 Get Directions Write a Review

NPPES record last updated: December 28, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Ronald Ernest Fields Md NPPES

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

DR. RONALD ERNEST FIELDS MD (NPI 1962498196) is an individual critical care medicine provider in Baton Rouge, Louisiana, licensed in Louisiana (023084) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with Our Lady Of The Lake Regional Medical Center, and maintains a secondary practice location in Gonzales.

NPPES Registry Identity

NPI1962498196

Entity TypeIndividualMale

Primary Taxonomy207RC0200X

Provider Legal NameDR. RONALD ERNEST FIELDSCredential: MD

Location Address7777 HENNESSY BLVD STE 701Baton Rouge, LA 70808-4370

Mailing Address7777 Hennessy Blvd Ste 701Baton Rouge, LA 70808-4370 · (225) 765-5864 · Fax (225) 214-7003

Phone(225) 765-5864

Fax(225) 765-2013

Sole ProprietorNo

Medical School CMSLouisiana State University School Of Medicine In ShreveportGraduated 1996

Enumeration DateSeptember 22, 2005

Last NPPES UpdateDecember 28, 2020

NPPES CertifiedDecember 28, 2020

✔ NPI 1962498196 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RC0200X

License✔ Licensed in LA · 023084

Definition

An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

Also ListedSpecialistTaxonomy 174400000X · License 023084 (LA)

Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License 023084 (LA)

7777 HENNESSY BLVD STE 701, Baton Rouge, LA 70808

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Secondary Practice Location 1

Location 12647 S Saint Elizabeth Blvd Ste 215Gonzales, LA 70737-5020 · Phone (225) 765-5500 · Fax (225) 644-4206

Other Identifiers 3

Medicaid01034394MS

Other5H768BD12Medicare

Medicaid1494259LA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AmeriHealth Caritas Next, HMO Louisiana.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Ronald Ernest 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 ID7012979792

PECOS Enrollment IDI20041104000030

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.

Medicare Billing Reassignment

Medicare enrollment records show Ronald Fields reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Our Lady Of The Lake Physician Group LLC

Same address

Internal Medicine

7777 HENNESSY BLVD, STE 6002
Baton Rouge, LA 70808

Reassigned Medicare billing, Louisiana enrollment
873 clinicians in this Medicare group

NPI 1033494943 (225) 765-7727

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 11

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.

Test to examine how well the lungs exchange gases 94729

This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.

260 services257 patients

Test to measure expiratory airflow and volume changes before and after medication administration 94060

This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.

224 services222 patients

Test to determine lung volumes using sensors 94726

This test, called spirometry, measures lung capacity using sensors. You breathe into a mouthpiece attached to a device that records the amount and rate of air you inhale and exhale. It helps diagnose and monitor lung conditions.

208 services205 patients

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.

208 services144 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.

155 services122 patients

Test to measure expiratory airflow and volume 94010

This test, known as spirometry, assesses how well your lungs work. It measures how much air you can inhale, how much you can exhale and how quickly you can exhale. It's non-invasive and helps diagnose conditions like asthma or COPD.

104 services102 patients

Test for exercise-induced lung stress 94618

An exercise-induced lung stress test assesses how your lungs respond to physical activity. During the test, you'll exercise on a treadmill or stationary bike while your heart rate, breathing, blood pressure, and oxygen levels are monitored. This helps identify any abnormal lung responses to exercise.

68 services68 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.

51 services51 patients

Test to determine lung volumes using gas dilution or washout 94727

This test measures lung volumes by either diluting or washing out a known amount of gas in your lungs. You'll breathe in a harmless gas, then exhale. The exhaled air is analyzed to assess your lung capacity and function.

46 services45 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

42 services42 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.

22 services20 patients

Hospital Affiliations CMS Care Compare 2

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

Our Lady Of The Lake Regional Medical Center

Acute Care Hospitals · Baton Rouge, LA

4/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number190064

Location5000 Hennessy BlvdBaton Rouge, LA 70808 · E. Baton Rouge County

Emergency services

Our Lady Of The Angels Hospital

Acute Care Hospitals · Bogalusa, LA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number190312

Location433 Plaza StreetBogalusa, LA 70427 · Washington County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 70808 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

$124.60 typical visit price

range $53.43 – $164.73

Typical copayment $31.15 (range $13.35 – $41.18)

Most-billed visit code 99204

Established Patient

$95.09 typical visit price

range $16.64 – $133.62

Typical copayment $23.77 (range $4.16 – $33.40)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 5

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

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

2 suppliers31 claims32 services$15.12 avg. paid by Medicare

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

1 supplier17 claims17 services$2.79 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

2 suppliers46 claims46 services$58.82 avg. paid by Medicare

Albuterol, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose, 1 mg J7613

DME-Drugs Administered Through DME · category DG006N

3 suppliers16 claims3,036 services$0.03 avg. paid by Medicare

Pharmacy dispensing fee for inhalation drug(s); per 30 days Q0513

DME-Other DME · category DE000N

5 suppliers20 claims20 services$24.78 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.

LAURA CLESI KNIGHT PA

Physician Assistant (Medical)