Anesthetics, LocalNerve BlockPain, Postoperative
Dr. Roy A. Greengrass, MD
NPI1699762989PAC ID2466446703
- Medicare services, 2024
- 300
- Medicare patients, 2024
- 306
- Publications
- 23
- MIPS score, 2024
- 84
- Hospital affiliations
- 1
- Practice address
- 4500 San Pablo Rd, Jacksonville, FL 32224
- Practice phone
- Call (904) 953-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Greengrass' professional email, personal email and mobile number
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Dr. Roy A. Greengrass is an anesthesiologist in Jacksonville, Florida
Dr. Greengrass practices at Mayo Clinic Hospital in Jacksonville, Florida, part of Mayo Clinic.
Dr. Greengrass' NPI, 1699762989, was assigned on October 1, 2005. Dr. Greengrass holds Florida license ME81530.
NPI and contact details
- NPI
- 1699762989NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2466446703
- NPI enumeration date
- October 1, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (904) 953-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 79
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Roy A. Greengrass practices at Mayo Clinic Hospital in Jacksonville, Florida
Dr. Greengrass' primary practice is Mayo Clinic Hospital, at 4500 San Pablo Rd, Jacksonville, FL 32224 in Duval County. The practice phone is (904) 953-2000.
- Mayo Clinic Hospital4500 San Pablo Rd, Jacksonville, FL 32224 · Duval CountyPhone(904) 953-2000
Source: Dmand AI Affiliation Data
Dr. Roy A. Greengrass is affiliated with 1 site of care and 1 medical group
Dr. Greengrass' primary practice is Mayo Clinic Hospital in Jacksonville, Florida, part of Mayo Clinic. The medical group on file is Mayo Clinic Jacksonville.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Roy A. Greengrass' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greengrass practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mayo Clinic Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Roy A. Greengrass is one of 3,063 anesthesiologists in Florida
Anesthesiology is Dr. Greengrass' primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Greengrass is licensed in Florida.
Specialties and state licenses
- Anesthesiology, FloridaPrimary
Anesthesiologists near Dr. Greengrass
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
3,063anesthesiologists in Florida229anesthesiologists in Jacksonville44anesthesiologists at Mayo Clinic Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Roy A. Greengrass billed Medicare for 300 services in 2024
CMS data shows 300 Medicare services from Dr. Greengrass across 14 procedure codes in 2024, for 306 Medicare patients. Medicare paid $22,854 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024300
Medicare patients306
Paid by Medicare$22,854
Procedure codes14
Dr. Greengrass' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 1082024: 14433%
- Surgery
- 2023: 1152024: 14223%
- Imaging
- 2023: 02024: 14
Dr. Greengrass compared with the Florida median for anesthesiologists, 2024
- Dr. Greengrass
- Florida median
- Medicare services
- 300vs 744.1 times
- Medicare patients
- 306vs 1202.5 times
Medians across 2,878 anesthesiologists in Florida with Dmand AI profiles that report each measure.
Dr. Greengrass' 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. Greengrass?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Greengrass and other anesthesiologists in Florida.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Roy A. Greengrass treated 306 Medicare patients in 2024, average age 74
CMS counts 306 Medicare patients who saw Dr. Greengrass in 2024. The largest group is 65 to 74, with 147 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.67, 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. Greengrass' median patient age at 61, with 60% women.
Medicare patients, 2024306
Average age74
Average risk score1.67
Dr. Greengrass' Medicare patients by age, 2024
Dr. Greengrass' Medicare patients by sex, 2024
- Women15149%
- Men15551%
Chronic conditions among Dr. Greengrass' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis69%
- Ischemic heart disease33%
- Mood disorders33%
- Chronic kidney disease32%
- Anxiety31%
- Diabetes31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Greengrass' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Roy A. Greengrass scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Greengrass for performance year 2024, reported as part of a group. Dr. Greengrass accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Greengrass' MIPS scores, performance year 2024
- 84of 100Final score
- 74.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 73of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Roy A. Greengrass has 23 publications on record
Dmand AI links 23 papers to Dr. Greengrass, published from 2014 to 2024. 2015 was the busiest year, with 4. The most frequent topics are Nerve Block, Pain, Postoperative and Analgesics, Opioid. Dr. Greengrass has published most often in Rom J Anaesth Intensive Care. Dr. Greengrass' most frequent co-authors are Alberto Enrique Ardon, MD, Steven R. Clendenen, MD and Elird Bojaxhi, MD.
Papers23
Years published2014 to 2024
Dr. Greengrass' papers by year, 2014 to 2024
Topics Dr. Greengrass writes about most
- Nerve Block
- Pain, Postoperative
- Analgesics, Opioid
- Anesthesia, Conduction
- Mastectomy
- Anesthetics, Local
- Arthroplasty, Replacement, Knee
- Breast Neoplasms
Dr. Greengrass' most frequent co-authors
- Alberto Enrique Ardon, MD11 shared papers
- Steven R. Clendenen, MD7 shared papers
- Elird Bojaxhi, MD5 shared papers
Recent publications by Dr. Greengrass
AnalgesicsAnalgesics, OpioidBreast Neoplasms
BreastBreast NeoplasmsMastectomy
See who Dr. Greengrass researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Greengrass 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. Roy A. Greengrass received $143 in industry payments from 2018 to 2022
CMS Open Payments shows 2 general payments to Dr. Greengrass from 2 drug and device companies from 2018 to 2022. Food and beverage make up the largest share, 100% of the total. Acacia Pharma Inc paid the most, $77.
General payments to Dr. Greengrass by program year, 2018 to 2022
Companies that paid Dr. Greengrass the most, 2018 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Roy A. Greengrass'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)Clinician Public Reporting: Overall MIPS Performance (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) |
| 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. Roy A. Greengrass
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. Roy A. Greengrass' NPI number?
Dr. Roy A. Greengrass' NPI number is 1699762989. It was assigned on October 1, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Roy A. Greengrass?
Dr. Roy A. Greengrass is an anesthesiologist in Jacksonville, Florida. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Roy A. Greengrass practice?
Dr. Greengrass practices at 4500 San Pablo Rd, Jacksonville, FL 32224. Dr. Greengrass' primary practice is Mayo Clinic Hospital in Jacksonville, Florida, part of Mayo Clinic.
What is Dr. Roy A. Greengrass' office phone number?
The practice phone on file for Dr. Greengrass is (904) 953-2000.
What is Dr. Roy A. Greengrass' medical license number?
Dr. Greengrass holds Florida license ME81530.
Which hospitals is Dr. Roy A. Greengrass affiliated with?
Dr. Greengrass practices at Mayo Clinic Hospital in Jacksonville, Florida.
What medical group is Dr. Roy A. Greengrass part of?
Dr. Greengrass is linked to Mayo Clinic Jacksonville.
Does Dr. Roy A. Greengrass accept Medicare?
Yes. CMS data shows Dr. Greengrass billed Medicare for 300 services in 2024, and Dr. Greengrass accepts Medicare assignment.
What is Dr. Roy A. Greengrass' MIPS score?
Dr. Greengrass' MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Dr. Roy A. Greengrass see?
CMS counts 306 Medicare patients who saw Dr. Greengrass in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Dr. Roy A. Greengrass bill to Medicare?
In 2024, Dr. Greengrass' most billed Medicare services were surgery: brain, spine and nerves (64461), anesthesia (01402) and anesthesia (01214).
Has Dr. Roy A. Greengrass received payments from drug or device companies?
CMS Open Payments shows $143 in general payments to Dr. Greengrass from 2 companies from 2018 to 2022. The largest total came from Acacia Pharma Inc.
How long has Dr. Roy A. Greengrass been practicing?
Dr. Greengrass graduated from medical school in 1973, 53 years ago.
Does Dr. Roy A. Greengrass do research?
Dmand AI links 23 publications to Dr. Greengrass, published from 2014 to 2024.
Who does Dr. Roy A. Greengrass publish with?
Dr. Greengrass' most frequent co-authors are Alberto Enrique Ardon, MD (11 shared papers), Steven R. Clendenen, MD (7 shared papers) and Elird Bojaxhi, MD (5 shared papers).
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