Dr. Ana Cecilia C. Ortiz-Guerrero, MD
- Medicare services, 2024
- 2,115
- Medicare patients, 2024
- 484
- Part D claims, 2024
- 4,837
- Hospital affiliations
- 4
- Industry payments
- $13,971
- Practice address
- 3291 Skypark Dr, Torrance, CA 90505
- Practice phone
- Call (310) 530-7796
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
U.S. Renal Care Lomita Dialysis
Torrance, California
Find Dr. Ortiz-Guerrero's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Ana Cecilia C. Ortiz-Guerrero is a nephrologist in Torrance, California
Dr. Ortiz-Guerrero practices at U.S. Renal Care Lomita Dialysis in Torrance, California.
Dr. Ortiz-Guerrero's NPI, 1275776536, was assigned on April 15, 2009. Dr. Ortiz-Guerrero holds California license A117719.
- NPI
- 1275776536NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133365059
- NPI enumeration date
- April 15, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (310) 530-7796
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ana Cecilia C. Ortiz-Guerrero practices at U.S. Renal Care Lomita Dialysis in Torrance, California
Dr. Ortiz-Guerrero's primary practice is U.S. Renal Care Lomita Dialysis, at 3291 Skypark Dr, Torrance, CA 90505 in Los Angeles County. The practice phone is (310) 530-7796.
- U.S. Renal Care Lomita Dialysis3291 Skypark Dr, Torrance, CA 90505 · Los Angeles CountyPhone(310) 530-7796
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ana Cecilia C. Ortiz-Guerrero is affiliated with 8 sites of care and 1 medical group
Dr. Ortiz-Guerrero's primary practice is U.S. Renal Care Lomita Dialysis in Torrance, California. Dr. Ortiz-Guerrero is also affiliated with Torrance Memorial Medical Center. The medical group on file is Internal Medicine & Nephrology Medical Group, Inc. Dmand AI also links Dr. Ortiz-Guerrero to 3 more hospitals, 2 dialysis centers and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ana Cecilia C. Ortiz-Guerrero's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ortiz-Guerrero practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| U.S. Renal Care Lomita Dialysis | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ana Cecilia C. Ortiz-Guerrero is one of 1,401 nephrologists in California
Nephrology is Dr. Ortiz-Guerrero's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Ortiz-Guerrero is licensed in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Nephrologists near Dr. Ortiz-Guerrero
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ana Cecilia C. Ortiz-Guerrero billed Medicare for 2,115 services in 2024
CMS data shows 2,115 Medicare services from Dr. Ortiz-Guerrero across 10 procedure codes in 2024, for 484 Medicare patients. Medicare paid $265,983 for them.
Dr. Ortiz-Guerrero's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,7672024: 1,58111%
- Tests and treatments
- 2023: 5972024: 51813%
- Other services
- 2023: 02024: 16
Where Dr. Ortiz-Guerrero's Medicare services took place, 2024
- In an office1,08951%
- In a facility1,02649%
Dr. Ortiz-Guerrero compared with the California median for nephrologists, 2024
- Dr. Ortiz-Guerrero
- California median
- Medicare services
- 2,115vs 1,08495% above
- Medicare patients
- 484vs 30758% above
- Part D claims
- 4,334vs 9554.5 times
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Ortiz-Guerrero's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ana Cecilia C. Ortiz-Guerrero treated 484 Medicare patients in 2024, average age 75
CMS counts 484 Medicare patients who saw Dr. Ortiz-Guerrero in 2024. The largest group is 75 to 84, with 153 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 36% are also on Medicaid. Their average risk score is 3.81, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Ortiz-Guerrero's median patient age at 74, with 53% women.
Dr. Ortiz-Guerrero's Medicare patients by age, 2024
Dr. Ortiz-Guerrero's Medicare patients by sex, 2024
- Women24551%
- Men23949%
Chronic conditions among Dr. Ortiz-Guerrero's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes70%
- Heart failure49%
- Arthritis40%
- Ischemic heart disease40%
- Atrial fibrillation31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ortiz-Guerrero's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ana Cecilia C. Ortiz-Guerrero wrote 4,837 Medicare Part D claims in 2024
In 2024, Dr. Ortiz-Guerrero wrote 4,837 Medicare Part D claims for 587 patients. 86% of them were for generic drugs. CMS names the drug for 4,334 of them, across 73 drugs with 11 or more claims each, at $450,603 in total drug cost. In 2023, CMS named 4,567 claims across 81 drugs.
Dr. Ortiz-Guerrero's Part D claims by kind of drug, 2024
- Generic4,145 claims86%
- Brand-name618 claims13%
- Other74 claims2%
Dr. Ortiz-Guerrero's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ortiz-Guerrero's Part D claims, 2024
- Opioids1%26 of 4,837 claims
- Antibiotics3%163 of 4,837 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,5672024: 4,3345%
Drugs named by CMS: 73 in 2024, 81 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Ana Cecilia C. Ortiz-Guerrero offers telehealth to Medicare patients
Dr. Ortiz-Guerrero accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ortiz-Guerrero as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ana Cecilia C. Ortiz-Guerrero received $13,971 in industry payments from 2016 to 2025
CMS Open Payments shows 766 general payments to Dr. Ortiz-Guerrero from 43 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Relypsa, Inc. paid the most, $1,270.
General payments to Dr. Ortiz-Guerrero by program year, 2016 to 2025
General payments to Dr. Ortiz-Guerrero by kind, 2016 to 2025
- Food and beverage$13,912100%
- Education$590%
Companies that paid Dr. Ortiz-Guerrero the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ana Cecilia C. Ortiz-Guerrero's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Ana Cecilia C. Ortiz-Guerrero
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Ana Cecilia C. Ortiz-Guerrero's NPI number?
Dr. Ana Cecilia C. Ortiz-Guerrero's NPI number is 1275776536. It was assigned on April 15, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Ana Cecilia C. Ortiz-Guerrero?
Dr. Ana Cecilia C. Ortiz-Guerrero is a nephrologist in Torrance, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Ana Cecilia C. Ortiz-Guerrero practice?
Dr. Ortiz-Guerrero practices at 3291 Skypark Dr, Torrance, CA 90505. Dr. Ortiz-Guerrero's primary practice is U.S. Renal Care Lomita Dialysis in Torrance, California. Dmand AI also links Dr. Ortiz-Guerrero to 3 hospitals, 2 dialysis centers and 1 group practice or clinic.
What is Dr. Ana Cecilia C. Ortiz-Guerrero's office phone number?
The practice phone on file for Dr. Ortiz-Guerrero is (310) 530-7796.
What is Dr. Ana Cecilia C. Ortiz-Guerrero's medical license number?
Dr. Ortiz-Guerrero holds California license A117719.
Which hospitals is Dr. Ana Cecilia C. Ortiz-Guerrero affiliated with?
Dr. Ortiz-Guerrero is affiliated with Torrance Memorial Medical Center. Dmand AI links Dr. Ortiz-Guerrero to 3 more hospitals.
What medical group is Dr. Ana Cecilia C. Ortiz-Guerrero part of?
Dr. Ortiz-Guerrero is linked to Internal Medicine & Nephrology Medical Group, Inc.
Does Dr. Ana Cecilia C. Ortiz-Guerrero accept Medicare?
Yes. CMS data shows Dr. Ortiz-Guerrero billed Medicare for 2,115 services in 2024, and Dr. Ortiz-Guerrero accepts Medicare assignment.
Does Dr. Ana Cecilia C. Ortiz-Guerrero offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ortiz-Guerrero as offering telehealth services.
How many Medicare patients does Dr. Ana Cecilia C. Ortiz-Guerrero see?
CMS counts 484 Medicare patients who saw Dr. Ortiz-Guerrero in 2024, with an average age of 75.
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What services does Dr. Ana Cecilia C. Ortiz-Guerrero bill to Medicare?
In 2024, Dr. Ortiz-Guerrero's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99233) and dialysis (90960).
What drugs does Dr. Ana Cecilia C. Ortiz-Guerrero prescribe most?
In 2024 Medicare Part D data, Dr. Ortiz-Guerrero's most prescribed drugs by claims were Amlodipine Besylate, Furosemide and Losartan Potassium.
Has Dr. Ana Cecilia C. Ortiz-Guerrero received payments from drug or device companies?
CMS Open Payments shows $13,971 in general payments to Dr. Ortiz-Guerrero from 43 companies from 2016 to 2025. The largest total came from Relypsa, Inc.
How long has Dr. Ana Cecilia C. Ortiz-Guerrero been practicing?
Dr. Ortiz-Guerrero graduated from medical school in 2004, 22 years ago.
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