Antibodies, AntinuclearLupus Erythematosus, SystemicPurpura, Thrombocytopenic
Dr. Ernest Ivan Katler, MD
NPI1184770638
- Medicare services, 2017
- 95
- Part D claims, 2024
- 12
- Publications
- 3
- Industry payments
- $4,241
- State license
- 1
- Practice address
- 2101 Vale Road, San Pablo, CA 94806
- Practice phone
- Call (510) 620-0496
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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Dr. Ernest Ivan Katler is a rheumatologist in San Pablo, California
Dr. Katler practices in San Pablo, California.
Dr. Katler's NPI, 1184770638, was assigned on January 26, 2007. Dr. Katler graduated from UCSF School of Medicine in 1970. Dr. Katler holds California license A24404.
NPI and contact details
- NPI
- 1184770638NPI Registry (opens in a new tab)
- NPI enumeration date
- January 26, 2007
- NPI status
- Active
- Practice phone
- (510) 620-0496
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1970
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Ernest Ivan Katler's practice address is in San Pablo, California
Dr. Katler's practice address in the NPI Registry is 2101 Vale Road, San Pablo, CA 94806. The practice phone is (510) 620-0496.
- NPI Registry address2101 Vale Road, San Pablo, CA 94806Phone(510) 620-0496
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Ernest Ivan Katler's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Katler practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Katler's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ernest Ivan Katler is one of 821 rheumatologists in California
Rheumatology is Dr. Katler's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Katler is board certified in internal medicine by the American Board of Internal Medicine. Dr. Katler is licensed in California.
Specialties and state licenses
- Rheumatology, CaliforniaPrimary
Rheumatologists near Dr. Katler
Counts of rheumatologists 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. Ernest Ivan Katler billed Medicare for 95 services in 2017
CMS data shows 95 Medicare services from Dr. Katler across 1 procedure code in 2017, all of them office visits. Medicare paid $6,046 for them. Every service was in an office.
Medicare services, 201795
Paid by Medicare$6,046
Procedure codes1
Dr. Katler's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 3412017: 9572%
- Drugs given in the office
- 2016: 492017: 0100%
Dr. Katler compared with the California median for rheumatologists, 2017
- Dr. Katler
- California median
- Medicare services
- 95vs 90089% below
- Part D claims
- 23vs 96298% below
Medians across 773 rheumatologists in California with Dmand AI profiles that report each measure.
Dr. Katler's most billed Medicare procedure codes, 2017
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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Katler and other rheumatologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ernest Ivan Katler's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Dr. Katler's median patient age at 75, with 63% women.
Dr. Katler'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
- Women63%
- Men13%
Source: Dmand AI Patient Panel Data
Dr. Ernest Ivan Katler wrote 12 Medicare Part D claims in 2024
In 2024, Dr. Katler wrote 12 Medicare Part D claims. 100% of them were for generic drugs. They cover 2 drugs, with $1,953 in total drug cost. In 2018, CMS named 24 claims across 2 drugs.
Part D claims, 202412
Drugs named by CMS2
Total drug cost$1,953
Dr. Katler's most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 242019: 234%
Drugs named by CMS: 2 in 2019, 2 in 2018.
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. Ernest Ivan Katler has 3 publications on record
Dmand AI links 3 papers to Dr. Katler. The most frequent topics are Lupus Erythematosus, Systemic. Dr. Katler's most frequent co-author is Stephen H. Embury, MD.
Papers3
Topics Dr. Katler writes about most
- Lupus Erythematosus, Systemic
Dr. Katler's most frequent co-authors
Recent publications by Dr. Katler
Arch Intern Med
Adrenal Cortex HormonesAntibiotics, AntineoplasticImmunosuppression Therapy
See who Dr. Katler researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Katler works with, so you can find a warm path to the right rheumatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ernest Ivan Katler received $4,241 in industry payments from 2016 to 2020
CMS Open Payments shows 75 general payments to Dr. Katler from 13 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 99% of the total. Janssen Pharmaceuticals, Inc paid the most, $1,185.
General payments to Dr. Katler by program year, 2016 to 2020
General payments to Dr. Katler by kind, 2016 to 2020
$4.2Kin total
- Food and beverage$4,18999%
- Education$521%
Companies that paid Dr. Katler the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ernest Ivan Katler has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Katler.
Awards and honors for Dr. Katler
- Undated
- ACR Fellow
- FACP
Source: Dmand AI Professional Profile Data
Dr. Ernest Ivan Katler graduated from UCSF School of Medicine
Dr. Katler graduated from UCSF School of Medicine in 1970. Dr. Katler is a member of ACR.
- Medical school
- Board certified in internal medicine
- Board certified in rheumatology
Source: Dmand AI Professional Profile Data
Sources for Dr. Ernest Ivan Katler'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 |
| 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 Data |
| 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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Ernest Ivan Katler
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. Ernest Ivan Katler's NPI number?
Dr. Ernest Ivan Katler's NPI number is 1184770638. It was assigned on January 26, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ernest Ivan Katler?
Dr. Ernest Ivan Katler is a rheumatologist in San Pablo, California. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Ernest Ivan Katler practice?
Dr. Katler practices at 2101 Vale Road, San Pablo, CA 94806.
What is Dr. Ernest Ivan Katler's office phone number?
The practice phone on file for Dr. Katler is (510) 620-0496.
What is Dr. Ernest Ivan Katler's medical license number?
Dr. Katler holds California license A24404.
Does Dr. Ernest Ivan Katler accept Medicare?
Yes. CMS data shows Dr. Katler billed Medicare for 95 services in 2017.
Is Dr. Ernest Ivan Katler board certified?
Yes. Dr. Katler is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Ernest Ivan Katler bill to Medicare?
In 2017, Dr. Katler's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Ernest Ivan Katler go to medical school?
Dr. Katler graduated from UCSF School of Medicine in 1970.
What drugs does Dr. Ernest Ivan Katler prescribe most?
In 2019 Medicare Part D data, Dr. Katler's most prescribed drugs by claims were Potassium Chloride and Dyazide.
Show 4 more questionsShow fewer questions
Has Dr. Ernest Ivan Katler received payments from drug or device companies?
CMS Open Payments shows $4,241 in general payments to Dr. Katler from 13 companies from 2016 to 2020. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Ernest Ivan Katler been practicing?
Dr. Katler graduated from medical school in 1970, 56 years ago.
Does Dr. Ernest Ivan Katler do research?
Dmand AI links 3 publications to Dr. Katler.
Who does Dr. Ernest Ivan Katler publish with?
Dr. Katler's most frequent co-authors are Stephen H. Embury, MD (1 shared paper).
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