Dr. Ryan G. Fields, MD
- Medicare services, 2024
- 14
- Medicare patients, 2024
- 112
- Hospital affiliations
- 1
- Industry payments
- $2,882
- Medical groups
- 3
- Practice address
- One Robert Wood Johnson Place, New Brunswick, NJ 08901
- Practice phone
- Call (732) 828-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Fields' professional email, personal email and mobile number
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Dr. Ryan G. Fields is an anesthesiologist in New Brunswick, New Jersey
Dr. Fields practices at Robert Wood Johnson University Hospital in New Brunswick, New Jersey, part of RWJBarnabas Health.
Dr. Fields' NPI, 1427092386, was assigned on June 15, 2006. Dr. Fields graduated from Philadelphia College of Osteopathic Medicine in 2002. Dr. Fields holds New Jersey license 25MB08009300.
- NPI
- 1427092386NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8123021482
- NPI enumeration date
- June 15, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (732) 828-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ryan G. Fields practices at 2 locations in New Brunswick, New Jersey
Dr. Fields' primary practice is Robert Wood Johnson University Hospital, at One Robert Wood Johnson Place, New Brunswick, NJ 08901 in Middlesex County. The practice phone is (732) 828-3000. Dr. Fields also practices at Robert Wood Johnson University Hospital - New Brunswick, 1 Robert Wood Johnson Pl, New Brunswick, NJ 08901.
- Robert Wood Johnson University HospitalPrimaryOne Robert Wood Johnson Place, New Brunswick, NJ 08901 · Middlesex CountyPhone(732) 828-3000
- Robert Wood Johnson University Hospital - New Brunswick1 Robert Wood Johnson Pl, New Brunswick, NJ 08901 · Middlesex CountyPhone(732) 828-3000
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Ryan G. Fields is affiliated with 2 sites of care and 3 medical groups
Dr. Fields' primary practice is Robert Wood Johnson University Hospital in New Brunswick, New Jersey, part of RWJBarnabas Health. The medical group on file is Rutgers-RWJ Scleroderma Program. Dmand AI also links Dr. Fields to 2 more medical groups and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ryan G. Fields' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fields practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Robert Wood Johnson University Hospital | 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. Ryan G. Fields is one of 1,613 anesthesiologists in New Jersey
Anesthesiology is Dr. Fields' primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Fields is licensed in New Jersey.
Specialties and state licenses
- Anesthesiology, New JerseyPrimary
Anesthesiologists near Dr. Fields
Counts of anesthesiologists 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. Ryan G. Fields billed Medicare for 14 services in 2024
CMS data shows 14 Medicare services from Dr. Fields across 1 procedure code in 2024, for 112 Medicare patients. Medicare paid $2,572 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Fields' Medicare services by type, 2022 to 2024
- 2022
- 2024
- Anesthesia
- 2022: 192024: 1426%
- Surgery
- 2022: 122024: 0100%
Dr. Fields compared with the New Jersey median for anesthesiologists, 2024
- Dr. Fields
- New Jersey median
- Medicare services
- 14vs 9285% below
- Medicare patients
- 112vs 16934% below
Medians across 1,604 anesthesiologists in New Jersey with Dmand AI profiles that report each measure.
Dr. Fields' 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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Fields and other anesthesiologists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ryan G. Fields treated 112 Medicare patients in 2024, average age 72
CMS counts 112 Medicare patients who saw Dr. Fields in 2024. The largest group is 65 to 74, with 48 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 2.63, 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. Fields' median patient age at 17, with 59% women.
Dr. Fields' Medicare patients by age, 2024
Dr. Fields' Medicare patients by sex, 2024
- Women4338%
- Men6962%
Chronic conditions among Dr. Fields' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes55%
- Ischemic heart disease53%
- Arthritis48%
- Atrial fibrillation47%
- Chronic kidney disease46%
- Heart failure38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fields' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 17
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Ryan G. Fields takes part in Medicare
Dr. Fields 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. Ryan G. Fields received $2,882 in industry payments from 2016 to 2025
CMS Open Payments shows 18 general payments to Dr. Fields from 7 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 87% of the total. Provepharm Inc. paid the most, $2,500.
General payments to Dr. Fields by program year, 2016 to 2025
General payments to Dr. Fields by kind, 2016 to 2025
- Consulting fees$2,50087%
- Food and beverage$38213%
Companies that paid Dr. Fields the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ryan G. Fields graduated from Philadelphia College of Osteopathic Medicine
Dr. Fields graduated from Philadelphia College of Osteopathic Medicine in 2002.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ryan G. Fields'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 Affiliation DataDmand AI Practice 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) |
| 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. Ryan G. Fields
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What is Dr. Ryan G. Fields' NPI number?
Dr. Ryan G. Fields' NPI number is 1427092386. It was assigned on June 15, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ryan G. Fields?
Dr. Ryan G. Fields is an anesthesiologist in New Brunswick, New Jersey. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Ryan G. Fields practice?
Dr. Fields practices at One Robert Wood Johnson Place, New Brunswick, NJ 08901. Dr. Fields also practices at 1 Robert Wood Johnson Pl, New Brunswick, NJ 08901. Dr. Fields' primary practice is Robert Wood Johnson University Hospital in New Brunswick, New Jersey, part of RWJBarnabas Health. Dmand AI also links Dr. Fields to 2 medical groups and 1 group practice or clinic.
What is Dr. Ryan G. Fields' office phone number?
The practice phone on file for Dr. Fields is (732) 828-3000.
What is Dr. Ryan G. Fields' medical license number?
Dr. Fields holds New Jersey license 25MB08009300.
Which hospitals is Dr. Ryan G. Fields affiliated with?
Dr. Fields practices at Robert Wood Johnson University Hospital in New Brunswick, New Jersey.
What medical group is Dr. Ryan G. Fields part of?
Dr. Fields is linked to Rutgers-RWJ Scleroderma Program. Dmand AI links Dr. Fields to 2 more medical groups.
Does Dr. Ryan G. Fields accept Medicare?
Yes. CMS data shows Dr. Fields billed Medicare for 14 services in 2024, and Dr. Fields accepts Medicare assignment.
How many Medicare patients does Dr. Ryan G. Fields see?
CMS counts 112 Medicare patients who saw Dr. Fields in 2024, with an average age of 72.
What services does Dr. Ryan G. Fields bill to Medicare?
In 2024, Dr. Fields' most billed Medicare services were anesthesia (01922).
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Where did Dr. Ryan G. Fields go to medical school?
Dr. Fields graduated from Philadelphia College of Osteopathic Medicine in 2002.
Has Dr. Ryan G. Fields received payments from drug or device companies?
CMS Open Payments shows $2,882 in general payments to Dr. Fields from 7 companies from 2016 to 2025. The largest total came from Provepharm Inc.
How long has Dr. Ryan G. Fields been practicing?
Dr. Fields graduated from medical school in 2002, 24 years ago.
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