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Dr. Aaron G. Der, MD
NPI1174942130PAC ID9436418340
- Medicare services, 2023
- 17
- Medicare patients, 2024
- 25
- Part D claims, 2024
- 262
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 1011 Baldwin Park Blvd, Baldwin Park, CA 91706
- Practice phone
- Call (626) 851-1011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Der'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. Aaron G. Der is an internist in Baldwin Park, California
Dr. Der practices at Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California, part of Kaiser Permanente.
Dr. Der's NPI, 1174942130, was assigned on April 7, 2014. Dr. Der graduated from Boston University School of Medicine in 2014. Dr. Der holds California license A138897.
NPI and contact details
- NPI
- 1174942130NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436418340
- NPI enumeration date
- April 7, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (626) 851-1011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Aaron G. Der practices at Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California
Dr. Der's primary practice is Kaiser Permanente Baldwin Park Medical Center, at 1011 Baldwin Park Blvd, Baldwin Park, CA 91706 in Los Angeles County. The practice phone is (626) 851-1011.
- Kaiser Permanente Baldwin Park Medical Center1011 Baldwin Park Blvd, Baldwin Park, CA 91706 · Los Angeles CountyPhone(626) 851-1011
Source: Dmand AI Affiliation Data
Dr. Aaron G. Der is affiliated with 2 sites of care and 2 medical groups
Dr. Der's primary practice is Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California, part of Kaiser Permanente. Dr. Der is also affiliated with Antioch Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Der to 1 more medical group, named with a free account.
Antioch Medical CenterSouthern California Permanente Medical Group1 medical groupName with a free account
See all 4 affiliations for Dr. DerSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Aaron G. Der's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Der practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente Baldwin Park Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Aaron G. Der is one of 16,751 internists in California
Internal medicine is Dr. Der's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Der is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Der
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
16,751internists in California87internists in Baldwin Park78internists at Kaiser Permanente Baldwin Park Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Aaron G. Der billed Medicare for 17 services in 2023
CMS data shows 17 Medicare services from Dr. Der across 1 procedure code in 2023, for 25 Medicare patients. Medicare paid $2,470 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202317
Medicare patients25
Paid by Medicare$2,470
Procedure codes1
Dr. Der's Medicare services by type, 2018 to 2023
- 2018
- 2023
- Office and hospital visits
- 2018: 852023: 1780%
Dr. Der compared with the California median for internists, 2023
- Dr. Der
- California median
- Medicare services
- 17vs 36195% below
- Medicare patients
- 25vs 15183% below
- Part D claims
- 41vs 42190% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Der's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Der?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Der and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Aaron G. Der treated 25 Medicare patients in 2024, average age 73
CMS counts 25 Medicare patients who saw Dr. Der in 2024. 75% of them have diabetes, and 75% have high blood pressure. Their average risk score is 3.82, 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. Der's median patient age at 75, with 53% women.
Medicare patients, 202425
Average age73
Average risk score3.82
Dr. Der's Medicare patients by sex, 2024
- Women1144%
- Men1456%
Chronic conditions among Dr. Der's Medicare patients, 2024
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Heart failure68%
- Chronic kidney disease64%
- Mood disorders60%
- Depression56%
- Ischemic heart disease48%
Share of Medicare patients with each condition. A patient can have several.
Dr. Der's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Aaron G. Der wrote 262 Medicare Part D claims in 2024
In 2024, Dr. Der wrote 262 Medicare Part D claims for 107 patients. 89% of them were for generic drugs. CMS names the drug for 41 of them, across 3 drugs with 11 or more claims each, at $517 in total drug cost. In 2023, CMS named 17 claims across 1 drug.
Part D claims, 2024262
Drugs named by CMS3
Total drug cost$517
Part D patients107
Dr. Der's Part D claims by kind of drug, 2024
- Generic233 claims89%
- Brand-name29 claims11%
Dr. Der'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. Der's Part D claims, 2024
- Opioids6%16 of 262 claims
- Antibiotics20%53 of 262 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: 172024: 41141%
Drugs named by CMS: 3 in 2024, 1 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 Dr. Aaron G. Der takes part in Medicare
Dr. Der 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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Dr. Aaron G. Der has 1 publication on record
Dmand AI links 1 paper to Dr. Der in 2014.
Papers1
Recent publications by Dr. Der
See who Dr. Der researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Der works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Aaron G. Der received $122 in industry payments in 2022
CMS Open Payments shows 1 general payment to Dr. Der from 1 drug or device company in 2022. Food and beverage make up the largest share, 100% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $122.
Companies that paid Dr. Der the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Aaron G. Der graduated from Boston University School of Medicine
Dr. Der graduated from Boston University School of Medicine in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Aaron G. Der'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Aaron G. Der
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. Aaron G. Der's NPI number?
Dr. Aaron G. Der's NPI number is 1174942130. It was assigned on April 7, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Aaron G. Der?
Dr. Aaron G. Der is an internist in Baldwin Park, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Aaron G. Der practice?
Dr. Der practices at 1011 Baldwin Park Blvd, Baldwin Park, CA 91706. Dr. Der's primary practice is Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California, part of Kaiser Permanente. Dmand AI also links Dr. Der to 1 medical group.
What is Dr. Aaron G. Der's office phone number?
The practice phone on file for Dr. Der is (626) 851-1011.
What is Dr. Aaron G. Der's medical license number?
Dr. Der holds California license A138897.
Which hospitals is Dr. Aaron G. Der affiliated with?
Dr. Der practices at Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California. Dr. Der is also affiliated with Antioch Medical Center.
What medical group is Dr. Aaron G. Der part of?
Dr. Der is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Der to 1 more medical group.
Does Dr. Aaron G. Der accept Medicare?
Yes. CMS data shows Dr. Der billed Medicare for 17 services in 2023, and Dr. Der accepts Medicare assignment.
How many Medicare patients does Dr. Aaron G. Der see?
CMS counts 25 Medicare patients who saw Dr. Der in 2024, with an average age of 73.
What services does Dr. Aaron G. Der bill to Medicare?
In 2023, Dr. Der's most billed Medicare services were hospital inpatient care (99223).
Show 5 more questionsShow fewer questions
Where did Dr. Aaron G. Der go to medical school?
Dr. Der graduated from Boston University School of Medicine in 2014.
What drugs does Dr. Aaron G. Der prescribe most?
In 2024 Medicare Part D data, Dr. Der's most prescribed drugs by claims were Furosemide, Amlodipine Besylate and Amoxicillin-Clavulanate Potass.
Has Dr. Aaron G. Der received payments from drug or device companies?
CMS Open Payments shows $122 in general payments to Dr. Der from 1 company from 2022 to 2022. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has Dr. Aaron G. Der been practicing?
Dr. Der graduated from medical school in 2014, 12 years ago.
Does Dr. Aaron G. Der do research?
Dmand AI links 1 publication to Dr. Der.
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