Dr. John R Walters , MD
Internal Medicine • Oxnard, CA
703 N A St
Oxnard, CA 930304309
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. John Walters is listed in NPPES under Internal Medicine.
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NPI assigned on October 27, 2005; this date does not establish years in practice.
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Published CMS data list 320 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 217 service units.
- 99443 — Telephone medical discussion with physician: 45 service units.
- 99497 — Advance care planning: 20 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 5 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 4,480 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium — 342 prescription fills, including refills.
- Lisinopril — 205 prescription fills, including refills.
- Amlodipine Besylate — 182 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 109 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 65% of clinicians listed under Internal Medicine in Oxnard, CA (2024, 27 clinicians with data). Median for this group: 858. Middle half: 214 to 1,442.
Fewer Medicare Part B services than 65% of clinicians listed under Internal Medicine in California (2024, 8,005 clinicians with data). Median for this group: 547. Middle half: 197 to 1,242.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 1,787 in 2020 to 320 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
703 N A St
Oxnard, CA 930304309
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of Southern California Keck School Of Medicine
1976
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
122 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 – by Provider, 2024.
Medicare-allowed amount
About $38,491 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 – by Provider and Service, 2024.
Paid by Medicare
About $27,944 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 – by Provider and Service, 2024.
30-day fills
9,737 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
$537,224 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 – by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $22.31 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.
Years since graduation
50 years (graduated 1976)
CMS Doctors and Clinicians data list 1976 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2005
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.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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, “Does your provider accept Medicare as full payment?”
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. Walters 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. Walters 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 Oxnard and California
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 65% of clinicians listed under Internal Medicine in Oxnard, CA (2024, 27 clinicians with data). Median for this group: 858. Middle half: 214 to 1,442.
Fewer Medicare Part B services than 65% of clinicians listed under Internal Medicine in California (2024, 8,005 clinicians with data). Median for this group: 547. Middle half: 197 to 1,242.
Medicare-allowed amount
A lower Medicare-allowed amount than 65% of clinicians listed under Internal Medicine in Oxnard, CA (2024, 27 clinicians with data). Median for this group: $88,000. Middle half: $22,059 to $148,631.
A lower Medicare-allowed amount than 60% of clinicians listed under Internal Medicine in California (2024, 8,005 clinicians with data). Median for this group: $57,391. Middle half: $20,415 to $125,751.
Paid by Medicare
A lower Medicare payment amount than 65% of clinicians listed under Internal Medicine in Oxnard, CA (2024, 27 clinicians with data). Median for this group: $69,031. Middle half: $17,434 to $117,370.
A lower Medicare payment amount than 60% of clinicians listed under Internal Medicine in California (2024, 8,005 clinicians with data). Median for this group: $43,431. Middle half: $14,887 to $95,905.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Internal Medicine in Oxnard, CA (2024, 32 clinicians with data). Median for this group: 922. Middle half: 149 to 3,728.
More Part D prescriptions than 75% of clinicians listed under Internal Medicine in California (2024, 10,795 clinicians with data). Median for this group: 1,254. Middle half: 150 to 4,240.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under Internal Medicine in Oxnard, CA (2024, 32 clinicians with data). Median for this group: $92,065. Middle half: $8,284 to $378,329.
A higher Part D drug cost than 85% of clinicians listed under Internal Medicine in California (2024, 10,795 clinicians with data). Median for this group: $88,105. Middle half: $7,557 to $307,080.
44 active clinicians are listed under Internal Medicine with a practice address in Oxnard, CA (17,717 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Oxnard
25% of these 44 clinicians have the CMS telehealth indicator.
65.9% of these 44 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 decreased 82% from 1,787 in 2020 to 320 in 2024.
- 2020: 1,787
- 2021: 1,644
- 2022: 1,206
- 2023: 752
- 2024: 320
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Medicare-allowed amount
Medicare-allowed amount decreased 81% from $204,940 in 2020 to $38,491 in 2024.
- 2020: $204,940
- 2021: $196,878
- 2022: $144,886
- 2023: $91,411
- 2024: $38,491
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Paid by Medicare
Paid by Medicare decreased 83% from $159,714 in 2020 to $27,944 in 2024.
- 2020: $159,714
- 2021: $153,129
- 2022: $106,432
- 2023: $67,081
- 2024: $27,944
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 49% from 3,002 in 2020 to 4,480 in 2024.
- 2020: 3,002
- 2021: 3,337
- 2022: 4,145
- 2023: 4,362
- 2024: 4,480
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30-day fills
30-day fills increased 60% from 6,102 in 2020 to 9,737 in 2024.
- 2020: 6,102
- 2021: 7,239
- 2022: 8,791
- 2023: 9,321
- 2024: 9,737
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Part D drug cost
Part D drug cost increased 208% from $174,699 in 2020 to $537,224 in 2024.
- 2020: $174,699
- 2021: $158,635
- 2022: $247,829
- 2023: $207,400
- 2024: $537,224
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $209.94 in 2019 to $22.31 in 2025.
- 2019: $209.94
- 2020: $22.73
- 2021: $34.22
- 2023: $108.86
- 2025: $22.31
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 · 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 – December 31, 2025): fewer than 11 records totaling $22.31.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Baxter Healthcare |
Food and Beverage
In-kind items and services
|
Hillrom - Vest System Model 105 Home Care | General | $22.31 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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 – by Provider and Service data, 2017–2024; 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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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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217 | 103 | $185.00 | $130.66 |
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99443
Telephone medical discussion with physician, 21-30 minutes
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45 | 28 | $145.00 | $125.28 |
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99497
Advance care planning, first 30 minutes
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20 | 20 | $97.00 | $82.57 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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19 | 19 | $195.00 | $130.42 |
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G0444
Annual depression screening, 5 to 15 minutes
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19 | 19 | $25.00 | $19.51 |
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 |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 342 | 29,143 | $2,027.71 | 98 |
| Lisinopril | Lisinopril | 205 | 15,951 | $1,126.04 | 55 |
| Amlodipine Besylate | Amlodipine Besylate | 182 | 13,619 | $849.30 | 48 |
| Levothyroxine Sodium | Levothyroxine Sodium | 150 | 12,308 | $1,497.70 | 40 |
| Metformin Hcl | Metformin Hcl | 146 | 12,415 | $953.26 | 45 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 129 | 4,774 | $5,008.51 | 34 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 127 | 3,428 | $3,566.54 | 26 |
| Alprazolam | Alprazolam | 114 | 3,504 | $260.18 | 19 |
| Tamsulosin Hcl | Tamsulosin Hcl | 113 | 8,045 | $1,882.39 | 32 |
| Gabapentin | Gabapentin | 103 | 5,686 | $1,785.50 | 28 |
| Omeprazole | Omeprazole | 103 | 7,638 | $1,658.00 | 25 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 88 | 7,990 | $735.01 | 29 |
| Metoprolol Succinate | Metoprolol Succinate | 84 | 7,380 | $734.54 | 21 |
| Hydrochlorothiazide | Hydrochlorothiazide | 79 | 6,935 | $304.34 | 25 |
| Warfarin Sodium | Warfarin Sodium | 78 | 953 | $410.81 | — |
| Losartan Potassium | Losartan Potassium | 75 | 6,640 | $648.19 | 23 |
| Metoprolol Tartrate | Metoprolol Tartrate | 71 | 4,839 | $418.06 | 18 |
| Clonazepam | Clonazepam | 65 | 2,776 | $268.22 | 13 |
| Furosemide | Furosemide | 63 | 4,290 | $323.66 | 21 |
| Pantoprazole Sodium | Pantoprazole Sodium | 63 | 4,304 | $601.40 | 22 |
| Lorazepam | Lorazepam | 59 | 1,760 | $233.34 | — |
| Trazodone Hcl | Trazodone Hcl | 57 | 3,151 | $295.49 | 13 |
| Allopurinol | Allopurinol | 55 | 4,890 | $605.47 | 14 |
| Citalopram Hbr | Citalopram Hydrobromide | 51 | 3,442 | $280.55 | 11 |
| Ipratropium-Albuterol | Ipratropium/Albuterol Sulfate | 50 | 406 | $1,400.61 | — |
(top 25 shown)
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
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 207RC0200X
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.
NUCC Taxonomy Code: 207RP1001X
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20120516000554
CA
3274607643
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Career & Practice History
NPI enumerated October 27, 2005.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Internal Medicine Providers in Oxnard
- Dr. Myo Min, MD
- Dr. Manuela Venturoni, MD
- Dr. Ming Heng, MD
- Tessa Shuler, FNP-C
- Dr. William Rajala, MD
- Dr. Yvonne Sanchez, MD
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Directory navigation, in NPI number order.
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Mailing Address
703 N A St
Oxnard, CA 930304309
Phone: 8054852340