Emergency Medical ServicesHeatingHypothermia
Dr. Robert James Katzer, MD
NPI1467612580PAC ID2860679453
- Medicare services, 2024
- 496
- Medicare patients, 2024
- 430
- Part D claims, 2024
- 227
- Publications
- 6
- Hospital affiliations
- 2
- Practice address
- 101 City Drive South, Orange, CA 92868
- Practice phone
- Call (714) 456-7890
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Katzer's professional email, personal email and mobile number
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Dr. Robert James Katzer is an emergency medicine physician in Orange, California
Dr. Katzer practices at UCI Health - Orange in Orange, California, part of UC Irvine.
Dr. Katzer's NPI, 1467612580, was assigned on June 12, 2008. Dr. Katzer graduated from Lewis Katz School of Medicine in 2008. Dr. Katzer holds California license A116544.
NPI and contact details
- NPI
- 1467612580NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860679453
- NPI enumeration date
- June 12, 2008
- NPI status
- Active
- Practice phone
- (714) 456-7890
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Robert James Katzer practices at UCI Health - Orange in Orange, California
Dr. Katzer's primary practice is UCI Health - Orange, at 101 City Drive South, Orange, CA 92868 in Orange County. The practice phone is (714) 456-7890.
- UCI Health - Orange101 City Drive South, Orange, CA 92868 · Orange CountyPhone(714) 456-7890
Source: Dmand AI Affiliation Data
Dr. Robert James Katzer is affiliated with 2 sites of care and 3 medical groups
Dr. Katzer's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. Dr. Katzer is also affiliated with Catalina Island Health. The medical group on file is UCI Health Anesthesia & Perioperative Care Services. Dmand AI also links Dr. Katzer to 2 more medical groups, each named with a free account.
Catalina Island HealthUCI Health Anesthesia & Perioperative Care Services2 medical groupsNames with a free account
See all 5 affiliations for Dr. KatzerSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert James Katzer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Katzer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCI Health - Orange | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert James Katzer is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Katzer's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Katzer is board certified in emergency medical services by the American Board of Emergency Medicine. Dmand AI has Dr. Katzer's licenses on file in 3 states: California, Virginia and District of Columbia.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Virginia license
- District of Columbia license
Emergency medicine physicians near Dr. Katzer
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
7,423emergency medicine physicians in California142emergency medicine physicians in Orange98emergency medicine physicians at UCI Health - Orange
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Robert James Katzer billed Medicare for 496 services in 2024
CMS data shows 496 Medicare services from Dr. Katzer across 11 procedure codes in 2024, for 430 Medicare patients. Medicare paid $52,513 for them.
Medicare services, 2024496
Medicare patients430
Paid by Medicare$52,513
Procedure codes11
Dr. Katzer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3862024: 43412%
- Imaging
- 2023: 572024: 4226%
- Tests and treatments
- 2023: 612024: 2067%
Where Dr. Katzer's Medicare services took place, 2024
- In an office18136%
- In a facility31564%
Dr. Katzer compared with the California median for emergency medicine physicians, 2024
- Dr. Katzer
- California median
- Medicare services
- 496vs 26587% above
- Medicare patients
- 430vs 24377% above
- Part D claims
- 115vs 6285% above
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Katzer'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.
Need commercial claims for Dr. Katzer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Katzer and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert James Katzer treated 430 Medicare patients in 2024, average age 73
CMS counts 430 Medicare patients who saw Dr. Katzer in 2024. The largest group is 65 to 74, with 165 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 43% are also on Medicaid. Their average risk score is 2.38, 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. Katzer's median patient age at 48, with 58% women.
Medicare patients, 2024430
Average age73
Average risk score2.38
Also on Medicaid43%
Dr. Katzer's Medicare patients by age, 2024
Dr. Katzer's Medicare patients by sex, 2024
- Women24156%
- Men18944%
Chronic conditions among Dr. Katzer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Diabetes42%
- Chronic kidney disease35%
- Ischemic heart disease35%
- Mood disorders33%
- Depression31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Katzer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert James Katzer wrote 227 Medicare Part D claims in 2024
In 2024, Dr. Katzer wrote 227 Medicare Part D claims for 156 patients. 93% of them were for generic drugs. CMS names the drug for 115 of them, across 9 drugs with 11 or more claims each, at $878 in total drug cost. In 2023, CMS named 12 claims across 1 drug.
Part D claims, 2024227
Drugs named by CMS9
Total drug cost$878
Part D patients156
Dr. Katzer's Part D claims by kind of drug, 2024
- Generic210 claims93%
- Brand-name and other17 claims7%
Dr. Katzer'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. Katzer's Part D claims, 2024
- Opioids6%13 of 227 claims
- Antibiotics37%83 of 227 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: 122024: 115858%
Drugs named by CMS: 9 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
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Dr. Robert James Katzer has 6 publications on record
Dmand AI links 6 papers to Dr. Katzer in 2020. Dr. Katzer's most frequent co-author is Roy Almog.
Papers6
Dr. Katzer's most frequent co-authors
Recent publications by Dr. Katzer
See who Dr. Katzer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Katzer works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Robert James Katzer graduated from Lewis Katz School of Medicine
Dr. Katzer graduated from Lewis Katz School of Medicine in 2008.
- Medical school
- Board certified in emergency medical services
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Robert James Katzer accepts plans from 2 insurance carriers
Dr. Katzer is in network with 2 carriers, including United Healthcare and CMS Medicare. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- United Healthcare
- CMS Medicare
Plan types Dr. Katzer accepts, by number of carriers
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Robert James Katzer'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Robert James Katzer
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. Robert James Katzer's NPI number?
Dr. Robert James Katzer's NPI number is 1467612580. It was assigned on June 12, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert James Katzer?
Dr. Robert James Katzer is an emergency medicine physician in Orange, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Robert James Katzer practice?
Dr. Katzer practices at 101 City Drive South, Orange, CA 92868. Dr. Katzer's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. Dmand AI also links Dr. Katzer to 2 medical groups.
What is Dr. Robert James Katzer's office phone number?
The practice phone on file for Dr. Katzer is (714) 456-7890.
What is Dr. Robert James Katzer's medical license number?
Dr. Katzer holds California license A116544, one of the licenses on file in 3 states.
Which states has Dr. Robert James Katzer been licensed in?
Dmand AI has state licenses on file for Dr. Katzer in California (2011 to 2026), Virginia (2009 to 2011) and District of Columbia (2008 to 2010).
Which hospitals is Dr. Robert James Katzer affiliated with?
Dr. Katzer practices at UCI Health - Orange in Orange, California. Dr. Katzer is also affiliated with Catalina Island Health.
What medical group is Dr. Robert James Katzer part of?
Dr. Katzer is linked to UCI Health Anesthesia & Perioperative Care Services. Dmand AI links Dr. Katzer to 2 more medical groups.
Does Dr. Robert James Katzer accept Medicare?
Yes. CMS data shows Dr. Katzer billed Medicare for 496 services in 2024.
How many Medicare patients does Dr. Robert James Katzer see?
CMS counts 430 Medicare patients who saw Dr. Katzer in 2024, with an average age of 73.
Show 8 more questionsShow fewer questions
Is Dr. Robert James Katzer board certified?
Yes. Dr. Katzer is board certified in emergency medical services by the American Board of Emergency Medicine.
What services does Dr. Robert James Katzer bill to Medicare?
In 2024, Dr. Katzer's most billed Medicare services were emergency department visit (99285), office visit, new patient (99203) and emergency department visit (99284).
Where did Dr. Robert James Katzer go to medical school?
Dr. Katzer graduated from Lewis Katz School of Medicine in 2008.
What drugs does Dr. Robert James Katzer prescribe most?
In 2024 Medicare Part D data, Dr. Katzer's most prescribed drugs by claims were Cephalexin, Albuterol Sulfate Hfa and Azithromycin.
How long has Dr. Robert James Katzer been practicing?
Dr. Katzer graduated from medical school in 2008, 18 years ago.
Does Dr. Robert James Katzer do research?
Dmand AI links 6 publications to Dr. Katzer.
Who does Dr. Robert James Katzer publish with?
Dr. Katzer's most frequent co-authors are Roy Almog (1 shared paper).
What insurance does Dr. Robert James Katzer accept?
Dr. Katzer is in network with 2 carriers, including United Healthcare and CMS Medicare. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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