J Neurointerv Surg
Cerebral Angiography
Dr. Robert Ryan Field, MD
NPI1700059615PAC ID4486819661
- Medicare services, 2024
- 18
- Medicare patients, 2024
- 159
- Publications
- 4
- Hospital affiliations
- 1
- Industry payments
- $71,075
- 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. Field'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. Robert Ryan Field is an anesthesiologist in Orange, California
Dr. Field practices at UCI Health - Orange in Orange, California, part of UC Irvine.
Dr. Field's NPI, 1700059615, was assigned on April 11, 2008. Dr. Field graduated from University of Kansas School of Medicine - Kansas City in 2008. Dr. Field's California license number on file is A121646.
NPI and contact details
- NPI
- 1700059615NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4486819661
- NPI enumeration date
- April 11, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- 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; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Ryan Field practices at UCI Health - Orange in Orange, California
Dr. Field'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 Ryan Field is affiliated with 2 sites of care and 1 medical group
Dr. Field's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. The medical group on file is UCI Health Anesthesia & Perioperative Care Services. Dmand AI also links Dr. Field to 1 more group practice or clinic, named with a free account.
UCI Health Anesthesia & Perioperative Care Services1 group practice or clinicName with a free account
See all 3 affiliations for Dr. FieldSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert Ryan Field's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Field 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 affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Ryan Field is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Field's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Field is board certified in anesthesiology by the American Board of Anesthesiology. Dmand AI has Dr. Field's licenses on file in 2 states: California and Missouri.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
- Missouri license
Anesthesiologists near Dr. Field
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
6,593anesthesiologists in California223anesthesiologists in Orange134anesthesiologists at UCI Health - Orange
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Robert Ryan Field billed Medicare for 18 services in 2024
CMS data shows 18 Medicare services from Dr. Field across 1 procedure code in 2024, for 159 Medicare patients. Medicare paid $1,892 for them. Every service was in an office.
Medicare services, 202418
Medicare patients159
Paid by Medicare$1,892
Procedure codes1
Dr. Field's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 582024: 1869%
- Surgery
- 2023: 192024: 0100%
Dr. Field compared with the California median for anesthesiologists, 2024
- Dr. Field
- California median
- Medicare services
- 18vs 7275% below
- Medicare patients
- 159vs 14311% above
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
Dr. Field'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. Field?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Field and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Ryan Field treated 159 Medicare patients in 2024, average age 72
CMS counts 159 Medicare patients who saw Dr. Field in 2024. The largest group is 65 to 74, with 59 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 44% are also on Medicaid. Their average risk score is 2.15, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Field's median patient age at 58, with 54% women.
Medicare patients, 2024159
Average age72
Average risk score2.15
Also on Medicaid44%
Dr. Field's Medicare patients by age, 2024
Dr. Field's Medicare patients by sex, 2024
- Women8352%
- Men7648%
Chronic conditions among Dr. Field's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Diabetes48%
- Ischemic heart disease33%
- Chronic kidney disease32%
- Anxiety29%
- Mood disorders28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Field's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Robert Ryan Field takes part in Medicare
Dr. Field 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. Robert Ryan Field has 4 publications on record
Dmand AI links 4 papers to Dr. Field, published from 2013 to 2021. The most frequent topics are Delirium and Respiration, Artificial. Dr. Field's most frequent co-authors are Walter A. Boyle, MD, Daniel Lewis Cooke, MD and Johanna Therese Fifi, MD.
Papers4
Years published2013 to 2021
Dr. Field's papers by year, 2013 to 2021
Topics Dr. Field writes about most
- Delirium
- Respiration, Artificial
Dr. Field's most frequent co-authors
- Walter A. Boyle, MD1 shared paper
- Daniel Lewis Cooke, MD1 shared paper
- Johanna Therese Fifi, MD1 shared paper
Recent publications by Dr. Field
AlgorithmsColloidsCrystalloid Solutions
Clinical ProtocolsControlled Before-After StudiesDelirium
Semin Cardiothorac Vasc Anesth
DeliriumPostoperative ComplicationsRespiration, Artificial
See who Dr. Field researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Field works with, so you can find a warm path to the right anesthesiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Robert Ryan Field received $71,075 in industry payments from 2016 to 2024
CMS Open Payments shows 74 general payments to Dr. Field from 7 drug and device companies from 2016 to 2024. Speaker and faculty fees make up the largest share, 77% of the total. Merck Sharp & Dohme Corporation paid the most, $68,290.
General payments to Dr. Field by program year, 2016 to 2024
General payments to Dr. Field by kind, 2016 to 2024
$71.1Kin total
- Speaker and faculty fees$54,86077%
- Travel and lodging$12,78518%
- Food and beverage$1,4302%
- Honoraria$1,2002%
- Consulting fees$8001%
Companies that paid Dr. Field the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert Ryan Field graduated from University of Kansas School of Medicine - Kansas City
Dr. Field graduated from University of Kansas School of Medicine - Kansas City in 2008.
- Medical school
- Board certified in anesthesiology
Source: Dmand AI Professional Profile Data
Dr. Robert Ryan Field accepts plans from 4 insurance carriers
Dr. Field is in network with 4 carriers, including Elevance, United Healthcare and Blue Cross and Blue Shield of Kansas City. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Elevance
- United Healthcare
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
Plan types Dr. Field accepts, by number of carriers
- HMO2
- EPO1
- Medicaid1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Robert Ryan Field'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) |
| 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 |
| 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 Ryan Field
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 Ryan Field's NPI number?
Dr. Robert Ryan Field's NPI number is 1700059615. It was assigned on April 11, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Ryan Field?
Dr. Robert Ryan Field is an anesthesiologist in Orange, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Robert Ryan Field practice?
Dr. Field practices at 101 City Drive South, Orange, CA 92868. Dr. Field's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. Dmand AI also links Dr. Field to 1 group practice or clinic.
What is Dr. Robert Ryan Field's office phone number?
The practice phone on file for Dr. Field is (714) 456-7890.
What is Dr. Robert Ryan Field's medical license number?
Dr. Field's California license number on file is A121646, one of the licenses on file in 2 states.
Which states has Dr. Robert Ryan Field been licensed in?
Dmand AI has state licenses on file for Dr. Field in California (2012 to 2025) and Missouri (since 2013).
Which hospitals is Dr. Robert Ryan Field affiliated with?
Dr. Field practices at UCI Health - Orange in Orange, California.
What medical group is Dr. Robert Ryan Field part of?
Dr. Field is linked to UCI Health Anesthesia & Perioperative Care Services.
Does Dr. Robert Ryan Field accept Medicare?
Yes. CMS data shows Dr. Field billed Medicare for 18 services in 2024, and Dr. Field accepts Medicare assignment.
How many Medicare patients does Dr. Robert Ryan Field see?
CMS counts 159 Medicare patients who saw Dr. Field in 2024, with an average age of 72.
Show 8 more questionsShow fewer questions
Is Dr. Robert Ryan Field board certified?
Yes. Dr. Field is board certified in anesthesiology by the American Board of Anesthesiology.
What services does Dr. Robert Ryan Field bill to Medicare?
In 2024, Dr. Field's most billed Medicare services were anesthesia (00142).
Where did Dr. Robert Ryan Field go to medical school?
Dr. Field graduated from University of Kansas School of Medicine - Kansas City in 2008.
Has Dr. Robert Ryan Field received payments from drug or device companies?
CMS Open Payments shows $71,075 in general payments to Dr. Field from 7 companies from 2016 to 2024. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Robert Ryan Field been practicing?
Dr. Field graduated from medical school in 2008, 18 years ago.
Does Dr. Robert Ryan Field do research?
Dmand AI links 4 publications to Dr. Field, published from 2013 to 2021.
Who does Dr. Robert Ryan Field publish with?
Dr. Field's most frequent co-authors are Walter A. Boyle, MD (1 shared paper), Daniel Lewis Cooke, MD (1 shared paper) and Johanna Therese Fifi, MD (1 shared paper).
What insurance does Dr. Robert Ryan Field accept?
Dr. Field is in network with 4 carriers, including Elevance, United Healthcare and Blue Cross and Blue Shield of Kansas City. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
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