Doctor profile · Federal record
Dr. Ethelwoldo Guerrero, MD
Internal Medicine Physician (CMS: Internal Medicine) · Colusa, CA
- NPI 1235155318
- Accepts Medicare
- 34 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
151 E Webster St
Colusa, CA 959322949
(530) 458-4250 - Mailing address
-
550 W Ranch View Dr
Rocklin, CA 957655396
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- September 23, 2011
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A61539
- Medicaid
- CA #00A6153900
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1235155318. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
3,570
Distinct HCPCS
10
Medicare allowed
$215,860
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J0897 |
Injection, denosumab, 1 mg | 1,200 | 11 | $23 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 1,149 | 484 | $93 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 436 | 291 | $77 | |
G0008 |
Administration of influenza virus vaccine | 139 | 135 | $33 | |
90662 |
Influenza vaccine split virus, preservative free | 125 | 121 | $71 | |
90480 |
Admn sarscov2 vacc 1 dose | 65 | 65 | $44 | |
91322 |
Sarscov2 vac 50 mcg/0.5ml im | 65 | 65 | $143 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 59 | 59 | $49 | |
G0009 |
Administration of pneumococcal vaccine | 39 | 39 | $33 | |
93005 |
Routine electrocardiogram (ecg) using at least 12 leads with tracing | 35 | 33 | $7 |
In context: peer comparison
Among 1 peers in Colusa Internal Medicine Physician, average services per provider: 142. This provider delivers 25× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
4,252
Patients
1,218
Total drug cost
$91,937
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 714 | 206 | $10,379 |
| Levothyroxine Sodium | Generic | 477 | 116 | $8,258 |
| Amlodipine Besylate | Generic | 367 | 114 | $3,518 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 349 | 59 | $12,166 |
| Losartan Potassium | Generic | 308 | 102 | $6,140 |
| Lisinopril | Generic | 278 | 89 | $3,512 |
| Gabapentin | Generic | 275 | 95 | $9,366 |
| Omeprazole | Generic | 258 | 76 | $4,872 |
| Pantoprazole Sodium | Generic | 225 | 64 | $5,890 |
| Metoprolol Succinate | Generic | 186 | 57 | $4,327 |
Hospital affiliations
Frequently asked questions
What is Dr. Ethelwoldo Guerrero's medical specialty?
Dr. Ethelwoldo Guerrero practices Internal Medicine Physician in Colusa, CA.
Where does Dr. Ethelwoldo Guerrero practice?
Dr. Ethelwoldo Guerrero practices at 151 E Webster St, Colusa, CA 959322949. Office phone: 5304584250.
What is Dr. Ethelwoldo Guerrero's NPI?
Dr. Ethelwoldo Guerrero's National Provider Identifier (NPI) is 1235155318, issued by NPPES.
Does Dr. Ethelwoldo Guerrero accept Medicare assignment?
Yes. Dr. Ethelwoldo Guerrero accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ethelwoldo Guerrero commonly perform?
Top Medicare-reported procedures in 2023: Injection, denosumab, 1 mg (HCPCS J0897); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.