Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

JAMES AUSTIN UNDERWOOD MD
NPI 1912432022
Physical Medicine & Rehabilitation - Sports Medicine in Jacksonville, FL

Q: What is James Underwood's NPI number?

The NPI number for James Underwood is 1912432022. It was assigned to this individual provider in the NPPES registry on April 26, 2017.

Q: What is James Underwood's specialty?

The primary specialty registered for this NPI is Physical Medicine & Rehabilitation, specializing in Sports Medicine, with taxonomy code 2081S0010X.

Q: When was this NPI record last updated?

The NPPES record for James Underwood was last updated on September 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 27 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 26, 2017PECOS EnrolledAccepts Medicare Assignment

4500 SAN PABLO RD S, JACKSONVILLE, FL 32224(904) 953-2000 Get Directions Write a Review

NPPES record last updated: September 28, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 28, 2026, Sep 22, 2026, Aug 31, 2026 and 3 more (6 updates tracked since 2017).

On this page

About James Austin Underwood Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JAMES AUSTIN UNDERWOOD MD (NPI 1912432022) is an individual sports medicine provider in Jacksonville, Florida, licensed in Florida (ME182898) and active in the NPI registry since April 2017. He is enrolled in Medicare PECOS, is affiliated with Inova Loudoun Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1912432022

Entity TypeIndividualMale

Primary Taxonomy2081S0010X

Provider Legal NameJAMES AUSTIN UNDERWOODCredential: MD

Location Address4500 SAN PABLO RD SJacksonville, FL 32224-1865

Mailing AddressPo Box 860912Minneapolis, MN 55486-0912

Phone(904) 953-2000

Sole ProprietorNo

Medical School CMSGeorgetown University School Of MedicineGraduated 2017

Enumeration DateApril 26, 2017

Last NPPES UpdateSeptember 28, 20266 updates tracked since enumeration

NPPES CertifiedSeptember 28, 2026

✔ NPI 1912432022 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysical Medicine & Rehabilitation · Sports MedicineAllopathic & Osteopathic Physicians

Taxonomy Code2081S0010X

Licenses✔ Licensed in FL · ME182898✔ Licensed in VA · 0101274225

Definition

A physician who specializes in Sports Medicine is responsible for continuous care related to the enhancement of health and fitness as well as the prevention of injury and illness. The specialist possesses knowledge and experience in the promotion of wellness and the prevention of injury from many areas of medicine such as exercise physiology, biomechanics, nutrition, psychology, physical rehabilitation, epidemiology, physical evaluation and injuries. It is the goal of a Sports Medicine specialist to improve the healthcare of the individual engaged in physical exercise.

Also ListedPhysical Medicine & RehabilitationTaxonomy 208100000X · License ME182898 (FL)

4500 SAN PABLO RD S, Jacksonville, FL 32224

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Secondary Practice Locations 2

Location 121475 Ridgetop Cir Ste 150Sterling, VA 20166-6580 · Phone (703) 444-5000 · Fax (703) 444-4999

Location 225055 Riding Plz Ste 260Chantilly, VA 20152-5922 · Phone (703) 272-5000 · Fax (703) 957-3804

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company), Sanford Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

James Austin Underwood Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7315217643

PECOS Enrollment IDI20220606000254

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show James Underwood reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Arthritis & Sports Orthopaedics PC

647 mi

Orthopaedic Surgery

21475 RIDGETOP CIRCLE, SUITE 150
Sterling, VA 20166

Reassigned Medicare billing, District of Columbia and Virginia enrollments
11 clinicians in this Medicare group

NPI 1558342840 (703) 444-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 33

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, dexamethasone sodium phosphate, 1 mg J1100

Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.

1,033 services104 patients

Hyaluronan or derivative, triluron, for intra-articular injection, 1 mg J7332

Triluron is a treatment involving injections of a substance called hyaluronan into your joints. It helps to lubricate and cushion the joint, which can reduce pain and improve movement, especially in conditions like osteoarthritis. Each injection contains 1 mg of hyaluronan.

780 services19 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

427 services267 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

280 services63 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

229 services156 patients

Low osmolar contrast material, 200-299 mg/ml iodine concentration, per ml Q9966

Low osmolar contrast material with 200-299 mg/ml iodine concentration is a type of dye used in certain medical tests like CT scans or X-rays. It helps to highlight specific areas in your body, making them easier to see and examine. It's safe and commonly used.

203 services68 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

194 services194 patients

Destruction of peripheral nerve or branch 64640

Destruction of a peripheral nerve or branch is a procedure to treat nerve-related pain. It involves using heat, cold, or chemicals to damage or destroy the nerve, thereby blocking pain signals to the brain. This can provide long-term pain relief.

181 services31 patients

X-ray of lower and sacral spine, minimum of 4 views 72110

An X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.

116 services115 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

98 services98 patients

Ultrasonic guidance for needle placement 76942

Ultrasonic guidance for needle placement is a technique where sound waves create images that help accurately position the needle during procedures. This method ensures precision, minimizes discomfort, and increases safety.

75 services60 patients

Needle measurement of electrical activity in arm or leg muscles, complete study 95886

This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. This complete study helps diagnose issues with nerves or muscles, providing valuable data for your treatment plan.

69 services49 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

64 services40 patients

Injection of substance into lower spine canal using imaging guidance 62323

This procedure involves injecting a substance into your lower spine canal, guided by real-time images. It's done to diagnose or treat various conditions. You may feel slight discomfort, but it's generally safe and can provide valuable information for your treatment plan.

63 services55 patients

X-ray of upper spine, 2-3 views 72040

An X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.

41 services41 patients

Aspiration and/or injection of fluid large joint using ultrasound guidance 20611

This procedure involves using ultrasound technology to accurately locate a large joint, usually the knee or shoulder. A needle is then inserted to either extract fluid (aspiration) or inject medication. The ultrasound helps ensure precision and safety.

38 services33 patients

Complete ultrasound scan of joint 76881

A complete ultrasound scan of a joint is a non-invasive procedure using sound waves to create images of your joint. It helps identify problems like inflammation, injury, or disease. It's painless, safe, and doesn't involve radiation.

32 services21 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

30 services23 patients

Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance 27096

This procedure involves injecting medicine into the joint where your lower spine meets your hip bone. Using special imaging technology, the doctor ensures the medicine is delivered accurately. This can help reduce pain and inflammation in that area.

28 services25 patients

Injection of lower or sacral spine facet joint using imaging guidance, single level 64493

This procedure involves injecting medication into the facet joint in your lower back or sacral spine. It's done under imaging guidance to ensure accuracy. The aim is to alleviate pain and inflammation. It's a safe, often effective method for managing spinal discomfort.

27 services21 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level 64483

This procedure involves injecting a mix of numbing and anti-inflammatory medication into a specific nerve root in the lower back. It helps manage pain and reduce inflammation. The process is guided by imaging technology for precision.

26 services22 patients

Injection of lower or sacral spine facet joint using imaging guidance, second level 64494

This procedure involves injecting medication into the facet joints of your lower or sacral spine to manage pain. Imaging guidance ensures accurate placement. It's the second level, meaning it's done on two different joint levels.

26 services20 patients

Injection of trigger points, 1-2 muscles 20552

Trigger point injection is a procedure used to treat painful areas of muscle that contain trigger points, or knots of muscle that form when muscles do not relax. 1-2 muscles are typically treated in one session. The procedure involves injecting medications into these points to alleviate pain.

22 services18 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

19 services18 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

19 services17 patients

Nerve conduction, 9-10 studies 95911

Nerve conduction studies involve sending small electrical shocks through the skin to measure how quickly nerves transmit signals. This helps detect nerve damage. 9-10 studies mean this process will be repeated on different nerves to gather comprehensive data.

18 services18 patients

Injection of anesthetic agent and/or steroid into other nerve or branch 64450

This procedure involves injecting an anesthetic agent or steroid into a specific nerve or its branch. The goal is to relieve pain by reducing inflammation and numbing the area. It is commonly used for chronic pain management. The process is safe and usually quick.

17 services13 patients

Limited ultrasound scan of joint or other extremity structure except blood vessels 76882

A limited ultrasound scan of a joint or other extremity structure lacking blood vessels is a non-invasive procedure that uses sound waves to create images of the inside of your body. This helps in diagnosing and monitoring conditions related to your joints or other similar structures.

17 services17 patients

Nerve conduction, 5-6 studies 95909

Nerve conduction studies involve testing the speed and strength of signals traveling through your nerves. This helps identify any nerve damage or dysfunction. For 5-6 studies, this means multiple nerves will be tested. Small electrodes are placed on your skin to send and receive signals, causing minimal discomfort.

17 services17 patients

Destruction of nerve branches of knee using imaging guidance 64624

This procedure involves the use of imaging technology to accurately locate and destroy specific nerve branches in the knee. This can help reduce chronic knee pain. The procedure is minimally invasive and usually performed under local anesthesia.

15 services11 patients

X-ray of middle spine, 2 views 72070

An X-ray of the middle spine, or thoracic spine, involves capturing two different images of the area. This non-invasive procedure uses small amounts of radiation to visualize the bones and tissues in your back, helping to identify any abnormalities or injuries.

15 services15 patients

Nerve conduction, 3-4 studies 95908

Nerve conduction studies are tests that measure how well your nerves are working. In a 3-4 studies procedure, electrical signals are sent through 3-4 nerves. The speed and strength of the signal's travel is recorded to detect any nerve damage or dysfunction.

14 services14 patients

Injection of anesthetic agent and/or steroid into knee nerve branch using imaging guidance 64454

This procedure involves injecting anesthetic and/or steroid medication into a knee nerve branch. Imaging technology is used to ensure accurate placement of the needle. This can help reduce pain and inflammation in the knee area.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Inova Loudoun Hospital

Acute Care Hospitals · Leesburg, VA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490043

Location44045 Riverside ParkwayLeesburg, VA 20176 · Loudoun County

Emergency services Birthing friendly

Virginia Hospital Center

Acute Care Hospitals · Arlington, VA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490050

Location1701 North George Mason DriveArlington, VA 22205 · Arlington County

Emergency services Birthing friendly

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KATHERINE L WALSH PA-C/MPH

Physician Assistant