Ethelwoldo Guerrero, MD
NPI 1235155318 · Internal Medicine Physician · Colusa, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ethelwoldo Guerrero, MD is a Internal Medicine Physician provider in Colusa, CA (NPI 1235155318).
Provider details
- NPI number
- 1235155318
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A61539 (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
19 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
3,365 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 | 1,227 | $91 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 1,124 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 452 | $73 |
| Administration of Influenza Virus VaccineG0008 | 126 | $34 |
| Admn Sarscov2 Vacc 1 Dose90480 | 106 | $46 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 155 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 826 | 241 |
| Levothyroxine Sodium | 441 | 115 |
| Amlodipine Besylate | 403 | 123 |
| Losartan Potassium | 361 | 104 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 316 | 56 |
| Lisinopril | 308 | 89 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-14
- Last updated
- 2011-09-23
Frequently asked questions
- What is Ethelwoldo Guerrero's NPI number?
- Ethelwoldo Guerrero's National Provider Identifier (NPI) is 1235155318, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ethelwoldo Guerrero's specialty?
- Ethelwoldo Guerrero is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ethelwoldo Guerrero located?
- Ethelwoldo Guerrero's practice location on file with NPPES is 151 E Webster St, Colusa, CA 95932-2949.
- What is Ethelwoldo Guerrero's phone number?
- The practice phone number listed in the NPPES registry for Ethelwoldo Guerrero is (530) 458-4250.
- Does Ethelwoldo Guerrero accept Medicare?
- Ethelwoldo Guerrero is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ethelwoldo Guerrero's NPI active?
- Yes — Ethelwoldo Guerrero's NPI (1235155318) is active in the NPPES registry as of the last update on 2011-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.