Randy Villanueva, D.O.
NPI 1518270040 · Internal Medicine Physician · Vallejo, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Randy Villanueva, D.O. is a Internal Medicine Physician provider in Vallejo, CA (NPI 1518270040).
Provider details
- NPI number
- 1518270040
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A11659 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 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
100 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 80 | $84 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 20 | $88 |
Typical Medicare-allowed amounts for these services range $84–$88 (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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clopidogrel Bisulfatebrand: Clopidogrel | 35 | 18 |
| Atorvastatin Calcium | 33 | 15 |
| Cefpodoxime Proxetil | 29 | 27 |
| Furosemide | 22 | 18 |
| Doxycycline Monohydrate | 19 | 18 |
| Pantoprazole Sodium | 17 | 16 |
| Prednisone | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-07-26
- Last updated
- 2022-02-11
Frequently asked questions
- What is Randy Villanueva's NPI number?
- Randy Villanueva's National Provider Identifier (NPI) is 1518270040, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Randy Villanueva's specialty?
- Randy Villanueva is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Randy Villanueva located?
- Randy Villanueva's practice location on file with NPPES is 975 Sereno Dr, Vallejo, CA 94589-2441.
- What is Randy Villanueva's phone number?
- The practice phone number listed in the NPPES registry for Randy Villanueva is (707) 651-2440.
- Does Randy Villanueva accept Medicare?
- Randy Villanueva is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Randy Villanueva's NPI active?
- Yes — Randy Villanueva's NPI (1518270040) is active in the NPPES registry as of the last update on 2022-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.