Michael Guerena, MD
NPI 1841222171 · Specialist · Oceanside, CA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Guerena, MD is a Specialist provider in Oceanside, CA (NPI 1841222171).
Provider details
- NPI number
- 1841222171
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G80926 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
2,604 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,085 | $93 |
| Limited Ultrasound Scan of Pelvis76857 | 397 | $52 |
| Test Or Measurement for Functional Capacity, Each 15 Minutes97750 | 392 | $30 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 258 | $131 |
| Manual Urinalysis Test With Examination Using Microscope, Non-Automated81000 | 158 | $4 |
| Diagnostic Exam of Bladder and Urethra Using an Endoscope52000 | 72 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 489 | 152 |
| Finasteride | 314 | 103 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 191 | 103 |
| Ciprofloxacin Hcl | 133 | 86 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 128 | 74 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 125 | 79 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,350 across 78 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
- 2006-07-07
- Last updated
- 2017-05-01
Frequently asked questions
- What is Michael Guerena's NPI number?
- Michael Guerena's National Provider Identifier (NPI) is 1841222171, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Guerena's specialty?
- Michael Guerena is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Michael Guerena located?
- Michael Guerena's practice location on file with NPPES is 3609 Vista Way, Oceanside, CA 92056-4522.
- What is Michael Guerena's phone number?
- The practice phone number listed in the NPPES registry for Michael Guerena is (760) 637-2500.
- Does Michael Guerena accept Medicare?
- Michael Guerena is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Guerena's NPI active?
- Yes — Michael Guerena's NPI (1841222171) is active in the NPPES registry as of the last update on 2017-05-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.