Santiago Lopez Jr.
- Medicare services, 2024
- 36
- Medicare patients, 2024
- 43
- Part D claims, 2024
- 357
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 9965 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente - Fontana Medical Center
Fontana, California
Find Santiago Lopez's professional email, personal email and mobile number
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Santiago Lopez Jr. is an emergency medicine physician in Fontana, California
Santiago Lopez practices at Kaiser Permanente - Fontana Medical Center in Fontana, California.
Santiago Lopez's NPI, 1104489897, was assigned on April 17, 2019. Santiago Lopez holds California license 184318.
- NPI
- 1104489897NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951639673
- NPI enumeration date
- April 17, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Santiago Lopez Jr. practices at Kaiser Permanente - Fontana Medical Center in Fontana, California
Santiago Lopez's primary practice is Kaiser Permanente - Fontana Medical Center, at 9965 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Kaiser Permanente - Fontana Medical Center9965 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Santiago Lopez Jr. is affiliated with 2 sites of care and 1 medical group
Santiago Lopez's primary practice is Kaiser Permanente - Fontana Medical Center in Fontana, California. Santiago Lopez is also affiliated with Fontana Medical Center. The medical group on file is Southern California Permanente Medical Group.
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 Santiago Lopez Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Santiago Lopez practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente - Fontana Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Santiago Lopez Jr. is one of 7,423 emergency medicine physicians in California
Emergency medicine is Santiago Lopez's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Santiago Lopez is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Santiago Lopez
Counts of emergency medicine physicians 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
Santiago Lopez Jr. billed Medicare for 36 services in 2024
CMS data shows 36 Medicare services from Santiago Lopez across 1 procedure code in 2024, for 43 Medicare patients. Medicare paid $2,571 for them. Every service was in a facility, such as a hospital, rather than an office.
Santiago Lopez compared with the California median for emergency medicine physicians, 2024
- Santiago Lopez
- California median
- Medicare services
- 36vs 26586% below
- Medicare patients
- 43vs 24382% below
- Part D claims
- 254vs 624.1 times
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Santiago Lopez'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
Santiago Lopez Jr. treated 43 Medicare patients in 2024, average age 70
CMS counts 43 Medicare patients who saw Santiago Lopez in 2024. The largest group is 65 to 74, with 19 patients. 75% of them have high blood pressure, and 70% have high cholesterol. 74% are also on Medicaid. Their average risk score is 3.15, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Santiago Lopez's median patient age at 46, with 56% women.
Santiago Lopez's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Santiago Lopez's Medicare patients by sex, 2024
- Women2353%
- Men2047%
Chronic conditions among Santiago Lopez's Medicare patients, 2024
- High blood pressure75%
- High cholesterol70%
- Diabetes56%
- Arthritis42%
- Chronic kidney disease40%
- Heart failure37%
- Ischemic heart disease37%
- Anxiety28%
Share of Medicare patients with each condition. A patient can have several.
Santiago Lopez's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 46
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Santiago Lopez Jr. wrote 357 Medicare Part D claims in 2024
In 2024, Santiago Lopez wrote 357 Medicare Part D claims for 224 patients. 92% of them were for generic drugs. CMS names the drug for 254 of them, across 12 drugs with 11 or more claims each, at $3,509 in total drug cost. In 2023, CMS named 96 claims across 5 drugs.
Santiago Lopez's Part D claims by kind of drug, 2024
- Generic330 claims92%
- Brand-name27 claims8%
Santiago Lopez'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 Santiago Lopez's Part D claims, 2024
- Opioids11%39 of 357 claims
- Antibiotics41%145 of 357 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: 962024: 254165%
Drugs named by CMS: 12 in 2024, 5 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
How Santiago Lopez Jr. takes part in Medicare
Santiago Lopez accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for Santiago Lopez Jr.'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) |
| 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 Santiago Lopez Jr.
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What is Santiago Lopez Jr.'s NPI number?
Santiago Lopez Jr.'s NPI number is 1104489897. It was assigned on April 17, 2019, and it is active in the NPI Registry.
What does Santiago Lopez Jr. specialize in?
Santiago Lopez Jr. is an emergency medicine physician in Fontana, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Santiago Lopez Jr. practice?
Santiago Lopez practices at 9965 Sierra Ave, Fontana, CA 92335. Santiago Lopez's primary practice is Kaiser Permanente - Fontana Medical Center in Fontana, California.
What is Santiago Lopez Jr.'s office phone number?
The practice phone on file for Santiago Lopez is (909) 427-5000.
What is Santiago Lopez Jr.'s medical license number?
Santiago Lopez holds California license 184318.
Which hospitals is Santiago Lopez Jr. affiliated with?
Santiago Lopez is affiliated with Fontana Medical Center.
What medical group is Santiago Lopez Jr. part of?
Santiago Lopez is linked to Southern California Permanente Medical Group.
Does Santiago Lopez Jr. accept Medicare?
Yes. CMS data shows Santiago Lopez billed Medicare for 36 services in 2024, and Santiago Lopez accepts Medicare assignment.
How many Medicare patients does Santiago Lopez Jr. see?
CMS counts 43 Medicare patients who saw Santiago Lopez in 2024, with an average age of 70.
What services does Santiago Lopez Jr. bill to Medicare?
In 2024, Santiago Lopez's most billed Medicare services were emergency department visit (99284).
What drugs does Santiago Lopez Jr. prescribe most?
In 2024 Medicare Part D data, Santiago Lopez's most prescribed drugs by claims were Cefpodoxime Proxetil, Azithromycin and Oxycodone-Acetaminophen.
How long has Santiago Lopez Jr. been practicing?
Santiago Lopez graduated from medical school in 2019, 7 years ago.
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