Active NPI 1699762989 Individual Practitioner Male Practitioner

Dr. Roy Greengrass , MD

Anesthesiology • Jacksonville, FL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Roy Greengrass, MD is a certified Anesthesiology practicing in Jacksonville, FL. With approximately 53 years of clinical experience since completing medical education in 1973, Dr. Greengrass delivers high-quality medical care to the local community at 4500 SAN PABLO RD S.

Dr. Greengrass is affiliated with Mayo Clinic Jacksonville and accepts Medicare assignment.

Frequently performed procedures and clinical services include injection of anesthetic agent into thoracic vertebra using imaging guidance, single site, anesthesia for procedure for total knee joint replacement, anesthesia for total hip replacement. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

4500 San Pablo Rd S

Jacksonville, FL 322241865

Telephone 9049532000

Associated Practice Facility / Clinic

🏢 Mayo Clinic Jacksonville Facility NPI 1790772317

Medicare Profile & Education

Medical School

Other

Graduation Year

1973

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Anesthesiology in Jacksonville, FL

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

53 Yrs +29.9 yrs vs City Avg

City Avg: 23.1 Yrs

State Avg: 27.3 Yrs

Regional Practice Density

274 Specialists

Practicing in Jacksonville, FL (3533 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

94.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Greengrass (53 Years) 53 Yrs

Jacksonville Specialty Average (23.1 Years) 23.1 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
64461 Injection of anesthetic agent into thoracic vertebra using imaging guidance, single site	47	47	$1529.02	$85.16
01402 Anesthesia for procedure for total knee joint replacement	45	45	$2083.55	$163.93
01214 Anesthesia for total hip replacement	35	35	$2258.33	$177.55
64447 Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve)	29	29	$1601.00	$58.85
64462 Injection of anesthetic agent into thoracic vertebra using imaging guidance, additional sites	26	26	$965.56	$53.95
00142 Anesthesia for lens surgery	15	15	$929.28	$73.23
64448 Continuous infusion of anesthetic agent and/or steroid into thigh nerve (femoral nerve) through catheter	15	15	$2816.00	$71.18
64415 Injection of anesthetic agent, brachial (arm) nerve bundle	14	14	$1761.00	$68.64
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	14	14	$664.00	$29.28
01996 Daily hospital management of continuous spinal drug administration	14	14	$349.00	$62.05
00400 Anesthesia for procedure on skin of arms, legs, or trunk	13	13	$1070.22	$83.29
01480 Anesthesia for open procedure on bones of lower leg, ankle and foot	11	11	$1084.80	$85.53
00520 Anesthesia for closed procedure in chest	11	11	$1365.60	$106.82
64450 Injection of anesthetic agent, other peripheral nerve or branch	11	11	$814.00	$37.79

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
64461 Injection of anesthetic agent into thoracic vertebra using imaging guidance, single site	45	45	$1357.80	$82.91
01402 Anesthesia for procedure for total knee joint replacement	35	35	$1902.53	$175.60
64462 Injection of anesthetic agent into thoracic vertebra using imaging guidance, additional sites	23	23	$855.37	$53.20
01214 Anesthesia for total hip replacement	21	21	$2182.15	$181.21
64447 Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve)	18	18	$1694.00	$51.57
64416 Continuous infusion of anesthetic agent and/or steroid into arm nerve bundle through catheter	17	17	$2652.00	$80.36
00520 Anesthesia for closed procedure in chest	16	16	$1190.40	$112.55
00731 Anesthesia for procedure on esophagus, stomach, and/or upper small bowel using an endoscope	13	13	$942.05	$88.79
01996 Daily hospital management of continuous spinal drug administration	12	12	$332.00	$63.50
64448 Continuous infusion of anesthetic agent and/or steroid into thigh nerve (femoral nerve) through catheter	12	11	$2695.00	$64.61
01830 Anesthesia for open or endoscopic procedure on bones of forearm, wrist, or hand	11	11	$1340.75	$126.58

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	56	56	$635.00	$31.07
64461 Injection of anesthetic agent into thoracic vertebra using imaging guidance, single site	33	33	$1413.55	$87.25
00520 Anesthesia for closed procedure in chest	23	22	$945.37	$110.67
00731 Anesthesia for procedure on esophagus, stomach, and/or upper small bowel using an endoscope	20	20	$696.78	$79.84
01402 Anesthesia for procedure for total knee joint replacement	17	17	$1658.68	$185.32
64462 Injection of anesthetic agent into thoracic vertebra using imaging guidance, additional sites	16	16	$903.38	$56.61
00811 Anesthesia for procedure on large bowel using an endoscope	15	15	$733.46	$86.31
64448 Continuous infusion of anesthetic agent and/or steroid into thigh nerve (femoral nerve) through catheter	13	13	$2695.00	$62.24
64416 Continuous infusion of anesthetic agent and/or steroid into arm nerve bundle through catheter	11	11	$2652.00	$64.98
01214 Anesthesia for total hip replacement	11	11	$2010.49	$198.71
64450 Injection of anesthetic agent, other peripheral nerve or branch	11	11	$856.36	$37.50

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	34	34	$49.30	$30.92
01402 Anesthesia for procedure for total knee joint replacement	27	27	$200.86	$181.31
00520 Anesthesia for closed procedure in chest	23	23	$126.40	$90.85
64461 Injection of anesthetic agent into thoracic vertebra using imaging guidance, single site	23	23	$192.10	$75.40
01996 Daily hospital management of continuous spinal drug administration	18	17	$65.79	$65.79
64462 Injection of anesthetic agent into thoracic vertebra using imaging guidance, additional sites	16	16	$145.99	$46.36
64416 Continuous infusion of anesthetic agent and/or steroid into arm nerve bundle through catheter	14	14	$67.00	$67.50
01214 Anesthesia for total hip replacement	14	14	$219.93	$192.09
64415 Injection of anesthetic agent, brachial (arm) nerve bundle	14	14	$65.06	$65.58
64447 Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve)	11	11	$54.36	$47.32

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	66	66	$41.35	$32.26
64461 Injection of anesthetic agent into thoracic vertebra using imaging guidance, single site	28	28	$81.31	$81.92
01402 Anesthesia for procedure for total knee joint replacement	27	27	$189.06	$190.84
64447 Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve)	24	24	$55.84	$54.01
01214 Anesthesia for total hip replacement	24	24	$208.60	$202.21
99231 Follow-up hospital inpatient care per day, typically 15 minutes	19	18	$53.79	$36.38
01996 Daily hospital management of continuous spinal drug administration	16	15	$81.82	$66.38
00520 Anesthesia for closed procedure in chest	15	15	$178.87	$91.39
64450 Injection of anesthetic agent, other peripheral nerve or branch	13	13	$44.92	$40.79
01810 Anesthesia for procedure on nerves, muscles, tendons, and tissue of forearm, wrist, and hand	11	11	$140.34	$77.06
64462 Injection of anesthetic agent into thoracic vertebra using imaging guidance, additional sites	11	11	$52.09	$52.32

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	28	28	$58.44	$30.87
01214 Anesthesia for total hip replacement	23	23	$251.68	$198.51
01402 Anesthesia for procedure for total knee joint replacement	16	16	$421.21	$180.11
64463 Injection of anesthetic agent, thoracic vertebra	13	13	$96.69	$80.06
00910 Anesthesia for other procedure on urinary system through urethra	11	11	$96.93	$72.42

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	65	65	$81.13	$30.05
01402 Anesthesia for procedure for total knee joint replacement	40	40	$333.52	$207.82
64461 Injection of anesthetic agent into thoracic vertebra using imaging guidance, single site	36	36	$100.32	$88.42
64415 Injection of anesthetic agent, brachial (arm) nerve bundle	28	28	$129.07	$57.10
01214 Anesthesia for total hip replacement	28	28	$282.56	$215.19
01996 Daily hospital management of continuous spinal drug administration	19	16	$72.65	$63.12
64463 Injection of anesthetic agent, thoracic vertebra	19	19	$266.24	$78.21
64448 Continuous infusion of anesthetic agent and/or steroid into thigh nerve (femoral nerve) through catheter	18	18	$129.79	$58.40
64447 Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve)	17	16	$115.84	$51.82
99231 Follow-up hospital inpatient care per day, typically 15 minutes	17	15	$49.77	$35.36
64462 Injection of anesthetic agent into thoracic vertebra using imaging guidance, additional sites	17	17	$64.37	$56.19
64445 Injection of anesthetic agent and/or steroid into lower back and leg nerve (sciatic nerve)	13	12	$194.82	$66.15
01420 Anesthesia for knee joint cast application, removal, or repair	12	12	$179.82	$153.32

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	61	56	$44.85	$36.88
01402 Anesthesia for procedure for total knee joint replacement	56	52	$236.96	$187.55
01214 Anesthesia for total hip replacement	48	47	$253.59	$217.59
64461 Injection of anesthetic agent into thoracic vertebra using imaging guidance, single site	41	41	$119.37	$82.90
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	26	26	$48.74	$30.60
64415 Injection of anesthetic agent, brachial (arm) nerve bundle	23	23	$106.13	$56.53
01996 Daily hospital management of continuous spinal drug administration	22	20	$69.92	$64.85
00320 Anesthesia for procedure on esophagus and neck, age 1 year or older	17	16	$198.97	$170.58
64445 Injection of anesthetic agent and/or steroid into lower back and leg nerve (sciatic nerve)	16	16	$81.05	$70.49
01638 Anesthesia for open or endoscopic total shoulder joint replacement	14	13	$240.02	$205.51
01480 Anesthesia for open procedure on bones of lower leg, ankle and foot	11	11	$112.11	$93.48
64462 Injection of anesthetic agent into thoracic vertebra using imaging guidance, additional sites	11	11	$112.63	$50.95
00790 Anesthesia for procedure in upper abdomen including use of an endoscope	11	11	$357.43	$182.32

Medical Specialties & State Licenses

CMS Verified: 2020-10-01

Anesthesiology Primary Specialty

NUCC Taxonomy Code: 207L00000X

State License FL ME81530

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

Hospital & Practice Group Affiliations

Mayo Clinic Jacksonville

4500 San Pablo Rd S, Jacksonville, FL 322241865

Phone: 9049532000

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners

Katherine Walsh , PA-C, MPH

Physician Assistant

NPI 1003015280

Physician Assistant (Certified), Master of Public Health

Dr. Jami Kinnucan , MD

Internal Medicine - Gastroenterology

NPI 1003045634

Doctor of Medicine (M.D.)

Dr. Glenn Shi , MD

Orthopaedic Surgery

NPI 1003058660

Doctor of Medicine (M.D.)

Dr. Michelle Tulang , MD

Internal Medicine

NPI 1003073586

Doctor of Medicine (M.D.)

Dr. Ricardo Pagan , MD

Hospitalist

NPI 1003100520

Doctor of Medicine (M.D.)

Crystal Lynn , CRNA

Nurse Anesthetist, Certified Registered

NPI 1003148768

Certified Registered Nurse Anesthetist

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

11 Historical Events

✅

NPI Profile Active December 13, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location December 13, 2017

Registered at 4500 SAN PABLO RD S, JACKSONVILLE, FL 322241865 (Tel: 9049532000)

📍

Updated Business Mailing Address December 13, 2017

Registered at 4500 SAN PABLO RD S, JACKSONVILLE, FL 322241865

👤

Provider Name / Credentials Updated December 13, 2017

Recorded as ROY GREENGRASS, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 13, 2017

Anesthesiology (License #ME81530 in FL)

✅

NPI Profile Active April 01, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location April 01, 2013

Registered at 4500 SAN PABLO RD S, JACKSONVILLE, FL 322241865 (Tel: 9049532000)

📍

Updated Business Mailing Address April 01, 2013

Registered at 4500 SAN PABLO RD S, JACKSONVILLE, FL 322241865 (Tel: 9049532000)

👤

Provider Name / Credentials Updated April 01, 2013

Recorded as ROY GREENGRASS, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 01, 2013

Anesthesiology (License #ME81530 in FL)

🟢

Initial NPI Registration & Enumeration October 01, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1699762989

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: October 01, 2005

Last Update: October 01, 2020

Sole Proprietor: No

Update or Correct Profile

Mailing Address

4500 San Pablo Rd S

Jacksonville, FL 322241865

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.