John Walters, MD
NPI 1013907203 · Internal Medicine Physician · Oxnard, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Walters, MD is a Internal Medicine Physician provider in Oxnard, CA (NPI 1013907203).
Provider details
- NPI number
- 1013907203
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A46739 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
320 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 217 | $131 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 45 | $125 |
| Advance Care Planning, First 30 Minutes99497 | 20 | $83 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 19 | $130 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 19 | $20 |
Typical Medicare-allowed amounts for these services range $20–$131 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 109 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 342 | 98 |
| Lisinopril | 205 | 55 |
| Amlodipine Besylate | 182 | 48 |
| Levothyroxine Sodium | 150 | 40 |
| Metformin Hcl | 146 | 45 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 129 | 34 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-27
- Last updated
- 2007-09-05
Frequently asked questions
- What is John Walters's NPI number?
- John Walters's National Provider Identifier (NPI) is 1013907203, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Walters's specialty?
- John Walters is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Walters located?
- John Walters's practice location on file with NPPES is 703 N a St, Oxnard, CA 93030-4309.
- What is John Walters's phone number?
- The practice phone number listed in the NPPES registry for John Walters is (805) 485-2340.
- Does John Walters accept Medicare?
- John Walters is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Walters's NPI active?
- Yes — John Walters's NPI (1013907203) is active in the NPPES registry as of the last update on 2007-09-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.