Fred Bayon, M.D.
NPI 1225031362 · Internal Medicine Physician · Vallejo, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Fred Bayon, M.D. is a Internal Medicine Physician provider in Vallejo, CA (NPI 1225031362).
Provider details
- NPI number
- 1225031362
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G69611 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
959 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 329 | $148 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 237 | $105 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 222 | $106 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 78 | $153 |
| Administration of Influenza Virus VaccineG0008 | 30 | $37 |
| Urinalysis, Manual Test81002 | 20 | $3 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 91 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 458 | 127 |
| Amlodipine Besylate | 255 | 66 |
| Olmesartan Medoxomil | 219 | 48 |
| Lisinopril | 121 | 28 |
| Levothyroxine Sodium | 117 | 34 |
| Fluticasone Propionate | 109 | 49 |
| Losartan Potassium | 103 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,297 across 111 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-05-23
- Last updated
- 2025-12-30
- Certified
- 2025-12-30
Frequently asked questions
- What is Fred Bayon's NPI number?
- Fred Bayon's National Provider Identifier (NPI) is 1225031362, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Fred Bayon's specialty?
- Fred Bayon is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Fred Bayon located?
- Fred Bayon's practice location on file with NPPES is 155 Glen Cove Marina Rd E, Vallejo, CA 94591-7284.
- What is Fred Bayon's phone number?
- The practice phone number listed in the NPPES registry for Fred Bayon is (707) 558-8699.
- Does Fred Bayon accept Medicare?
- Fred Bayon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Fred Bayon's NPI active?
- Yes — Fred Bayon's NPI (1225031362) is active in the NPPES registry as of the last update on 2025-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.