Ana Cecilia Ortiz-Guerrero, MD
NPI 1275776536 · Nephrology Physician · Torrance, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ana Cecilia Ortiz-Guerrero, MD is a Nephrology Physician provider in Torrance, CA (NPI 1275776536).
Provider details
- NPI number
- 1275776536
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A117719 (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
17 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
2,101 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 | 556 | $133 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 533 | $122 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 391 | $369 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 305 | $81 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 158 | $178 |
| Dialysis Services, Per Day, Less Than Full Month Service (20 Years Or Older)90970 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 73 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 331 | 107 |
| Furosemide | 308 | 103 |
| Losartan Potassium | 275 | 95 |
| Hydralazine Hcl | 240 | 88 |
| Nifedipinebrand: Nifedipine Er | 210 | 69 |
| Allopurinol | 195 | 63 |
| Valsartan | 160 | 39 |
| Tamsulosin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,728 across 149 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
- 2009-04-15
- Last updated
- 2018-02-28
Frequently asked questions
- What is Ana Cecilia Ortiz-Guerrero's NPI number?
- Ana Cecilia Ortiz-Guerrero's National Provider Identifier (NPI) is 1275776536, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ana Cecilia Ortiz-Guerrero's specialty?
- Ana Cecilia Ortiz-Guerrero is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Ana Cecilia Ortiz-Guerrero located?
- Ana Cecilia Ortiz-Guerrero's practice location on file with NPPES is 3291 Skypark Dr, Torrance, CA 90505-5004.
- What is Ana Cecilia Ortiz-Guerrero's phone number?
- The practice phone number listed in the NPPES registry for Ana Cecilia Ortiz-Guerrero is (310) 325-4517.
- Does Ana Cecilia Ortiz-Guerrero accept Medicare?
- Ana Cecilia Ortiz-Guerrero is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ana Cecilia Ortiz-Guerrero's NPI active?
- Yes — Ana Cecilia Ortiz-Guerrero's NPI (1275776536) is active in the NPPES registry as of the last update on 2018-02-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.