Dr. Eric M Fields , DO
Emergency Medicine โข Ventura, CA
147 N Brent St
Ventura, CA 930032854
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Eric Fields is listed in NPPES under Emergency Medicine.
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NPI assigned on May 19, 2006; this date does not establish years in practice.
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Published CMS data list 960 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99285 โ Emergency department visit with high level of medical decision making: 451 service units.
- 93010 โ Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only: 304 service units.
- 99284 โ Emergency department visit with moderate level of medical decision making: 113 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 6 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 226 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Ondansetron Hcl โ 95 prescription fills, including refills.
- Cephalexin โ 48 prescription fills, including refills.
- Oxycodone Hcl โ 28 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 6 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 85% of clinicians listed under Emergency Medicine in Ventura, CA (2024, 16 clinicians with data). Median for this group: 316. Middle half: 217 to 904.
More Medicare Part B services than 90% of clinicians listed under Emergency Medicine in California (2024, 4,681 clinicians with data). Median for this group: 344. Middle half: 123 to 622.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 713 in 2020 to 960 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
147 N Brent St
Ventura, CA 930032854
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Emergency Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
599 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $105,880 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $82,481 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
226 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$1,443 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $21.13 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Fields has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Fields as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Ventura and California
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 85% of clinicians listed under Emergency Medicine in Ventura, CA (2024, 16 clinicians with data). Median for this group: 316. Middle half: 217 to 904.
More Medicare Part B services than 90% of clinicians listed under Emergency Medicine in California (2024, 4,681 clinicians with data). Median for this group: 344. Middle half: 123 to 622.
Medicare-allowed amount
A higher Medicare-allowed amount than 90% of clinicians listed under Emergency Medicine in Ventura, CA (2024, 16 clinicians with data). Median for this group: $39,413. Middle half: $24,457 to $97,865.
A higher Medicare-allowed amount than 85% of clinicians listed under Emergency Medicine in California (2024, 4,681 clinicians with data). Median for this group: $43,405. Middle half: $15,802 to $75,721.
Paid by Medicare
A higher Medicare payment amount than 90% of clinicians listed under Emergency Medicine in Ventura, CA (2024, 16 clinicians with data). Median for this group: $29,628. Middle half: $18,510 to $74,700.
A higher Medicare payment amount than 85% of clinicians listed under Emergency Medicine in California (2024, 4,681 clinicians with data). Median for this group: $32,986. Middle half: $11,744 to $57,990.
Medicare Part D prescriptions
More Part D prescriptions than 70% of clinicians listed under Emergency Medicine in Ventura, CA (2024, 12 clinicians with data). Median for this group: 149. Middle half: 69 to 228.
More Part D prescriptions than 80% of clinicians listed under Emergency Medicine in California (2024, 4,294 clinicians with data). Median for this group: 85. Middle half: 36 to 171.
Part D drug cost
A higher Part D drug cost than 70% of clinicians listed under Emergency Medicine in Ventura, CA (2024, 12 clinicians with data). Median for this group: $885. Middle half: $171 to $1,467.
A higher Part D drug cost than 75% of clinicians listed under Emergency Medicine in California (2024, 4,294 clinicians with data). Median for this group: $649. Middle half: $241 to $1,439.
19 active clinicians are listed under Emergency Medicine with a practice address in Ventura, CA (7,761 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Ventura
10.5% of these 19 clinicians have the CMS telehealth indicator.
52.6% of these 19 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 35% from 713 in 2020 to 960 in 2024.
- 2020: 713
- 2021: 860
- 2022: 829
- 2023: 1,075
- 2024: 960
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Medicare-allowed amount
Medicare-allowed amount increased 35% from $78,684 in 2020 to $105,880 in 2024.
- 2020: $78,684
- 2021: $93,853
- 2022: $86,385
- 2023: $108,979
- 2024: $105,880
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Paid by Medicare
Paid by Medicare increased 24% from $66,313 in 2020 to $82,481 in 2024.
- 2020: $66,313
- 2021: $82,320
- 2022: $75,302
- 2023: $89,104
- 2024: $82,481
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 87% from 121 in 2020 to 226 in 2024.
- 2020: 121
- 2021: 220
- 2022: 171
- 2023: 227
- 2024: 226
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30-day fills
30-day fills increased 87% from 121 in 2020 to 226 in 2024.
- 2020: 121
- 2021: 220
- 2022: 171
- 2023: 227
- 2024: 226
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Part D drug cost
Part D drug cost went from $993 in 2020 to $1,443 in 2024.
- 2020: $993
- 2021: $1,748
- 2022: $1,326
- 2023: $1,451
- 2024: $1,443
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $17.05 in 2021 to $21.13 in 2025.
- 2021: $17.05
- 2022: $24.35
- 2023: $22.82
- 2025: $21.13
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): fewer than 11 records totaling $21.13.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| VERTEX PHARMACEUTICALS INCORPORATED |
Food and Beverage
In-kind items and services
|
JOURNAVX | General | $21.13 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99285
Emergency department visit with high level of medical decision making
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451 | 426 | $1235.00 | $172.90 |
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93010
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
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304 | 282 | $53.00 | $8.21 |
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99284
Emergency department visit with moderate level of medical decision making
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113 | 113 | $822.00 | $118.55 |
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99291
Critical care, first 30-74 minutes
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48 | 48 | $1459.00 | $213.42 |
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99283
Emergency department visit with low level of medical decision making
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23 | 22 | $424.00 | $70.57 |
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93042
Electrocardiogram (ecg) 1 to 3 leads with review by physician only
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21 | 21 | $90.00 | $6.78 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Ondansetron Hcl | Ondansetron Hcl | 95 | 380 | $406.87 | 95 |
| Cephalexin | Cephalexin | 48 | 350 | $359.69 | 47 |
| Oxycodone Hcl | Oxycodone Hcl | 28 | 52 | $156.90 | 28 |
| Prednisone | Prednisone | 26 | 112 | $96.84 | 26 |
| Ketorolac Tromethamine | Ketorolac Tromethamine | 16 | 79 | $123.29 | 16 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 13 | 276 | $299.29 | 13 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-03-04NUCC Taxonomy Code: 207P00000X
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
NUCC Taxonomy Code: 207PE0004X
An emergency medicine physician who specializes in non-hospital based emergency medical services (e.g., disaster site, accident scene, transport vehicle, etc.) to provide pre-hospital assessment, treatment, and transport patients.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - EMERGENCY MEDICINE
I20100310000164
CA
2466597828
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Anesthesiology
Doctor of Medicine (M.D.)
Student in an Organized Health Care Education/Training Program
Doctor of Osteopathic Medicine (D.O.)
Psychologist - Clinical
Doctor of Psychology (Psy.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Osteopathic Medicine (D.O.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 147 N BRENT ST, VENTURA, CA 930032854 (Tel: 8059488100)
NPI status registered as active in NPPES database
Registered at 1321 COLBY AVE, EVERETT, WA 982011665 (Tel: 4252612000)
Registered at 1342 NE 62ND ST, SEATTLE, WA 981156715
Recorded as ERIC FIELDS, DO
Emergency Medicine (license number reported to NPPES: WA OP00001813)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Emergency Medicine Providers in Ventura
- Dr. Allison Binkowski, MD
- Dr. Sylvana Guidotti, MD
- Dr. Gideon Gorit, MD
- Dr. Ben Lucas-Roberts, MD
- Tyler Humphrey
- Ted Mandryk, MEDICAL DOCTOR
Mailing Address
1342 Ne 62nd St
Seattle, WA 981156715