TIMOTHY LESLIE ALDER MD
NPI 1922207059
Radiology - Diagnostic Radiology in Knoxville, TN

Q: What is Timothy Alder's NPI number?

The NPI number for Timothy Alder is 1922207059. It was assigned to this individual provider in the NPPES registry on July 18, 2007.

Q: What is Timothy Alder's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for Timothy Alder was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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 July 18, 2007PECOS EnrolledAccepts Medicare Assignment

98.98/100

CMS Quality Rating

2001 LAUREL AVE, SUITE N304, KNOXVILLE, TN 37916(865) 766-6870(865) 766-0133 Get Directions Write a Review

NPPES record last updated: June 24, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

On this page

About Timothy Leslie Alder Md NPPES

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

TIMOTHY LESLIE ALDER MD (NPI 1922207059) is an individual diagnostic radiology provider in Knoxville, Tennessee, licensed in Tennessee (43586) and active in the NPI registry since July 2007. He is enrolled in Medicare PECOS, is affiliated with Union General Hospital, and is a graduate of University Of Arkansas College Of Medicine (2002).

NPPES Registry Identity

NPI1922207059

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameTIMOTHY LESLIE ALDERCredential: MD

Location Address2001 LAUREL AVE, SUITE N304Knoxville, TN 37916-1810

Mailing Address2001 Laurel Ave Ste N304Knoxville, TN 37916-1810 · (865) 766-6870 · Fax (865) 766-0133

Phone(865) 766-6870

Fax(865) 766-0133

Sole ProprietorNo

Medical School CMSUniversity Of Arkansas College Of MedicineGraduated 2002

Enumeration DateJuly 18, 2007

Last NPPES UpdateJune 24, 2026

NPPES CertifiedJune 24, 2026

✔ NPI 1922207059 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

Licenses✔ Licensed in TN · 43586✔ Licensed in WY · 13394C✔ Licensed in NE · 33293✔ Licensed in CO · CDRH.0063132

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

2001 LAUREL AVE, Knoxville, TN 37916

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Other Identifiers 1

Medicaid1514656TN

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.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

Timothy Leslie Alder 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 ID7618068693

PECOS Enrollment IDI20080730000146, I20200414002509

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 Reassignments

Medicare enrollment records show Timothy Alder reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Vista Radiology, PC.

Same address

Diagnostic Radiology

2001 LAUREL AVE STE N304
Knoxville, TN 37916

Reassigned Medicare billing, Colorado and Tennessee enrollments
3 clinicians in this Medicare group

NPI 1386698710 (865) 595-4100

Columbus Diagnostic Center Inc

241 mi

Diagnostic Radiology

7500 VETERANS PKWY STE B
Columbus, GA 31909

Reassigned Medicare billing, Georgia enrollment
58 clinicians in this Medicare group

NPI 1598081093 (706) 323-7622

South Georgia Radiology Associates, LLC

317 mi

Diagnostic Radiology

7505 WATERS AVE STE F10
Savannah, GA 31406

Reassigned Medicare billing, Colorado and Georgia enrollments

NPI 1760669931 (706) 975-5993

Sterling Radiology LLC

333 mi

Body Imaging

3131 S MAIN ST
Moultrie, GA 31768

Reassigned Medicare billing, Georgia enrollment
26 clinicians in this Medicare group

NPI 1770295537 (229) 985-3420

Donalsonville Hospital Inc

342 mi

Rural

102 HOSPITAL CIRCLE
Donalsonville, GA 39845

Reassigned Medicare billing, Georgia enrollment
101 clinicians in this Medicare group

NPI 1720095805 (229) 524-5217

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 56

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.

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

1,367 services1,234 patients

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

1,030 services986 patients

Mri scan of leg joint without contrast 73721

An MRI scan of your leg joint is a non-invasive procedure that uses magnetic fields and radio waves to create detailed images of the structures within your leg. This helps doctors diagnose or monitor conditions without using contrast dye.

356 services330 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

281 services275 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

262 services262 patients

Mri scan of arm joint without contrast 73221

An MRI scan of the arm joint is a non-invasive imaging procedure that uses magnetic fields and radio waves to create detailed images of the structures within your arm joint. No contrast dye is used in this process. It helps to diagnose or monitor conditions like arthritis, injuries, or infections.

259 services251 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

215 services215 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

202 services197 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

174 services172 patients

Ct scan of leg without contrast 73700

A CT scan of the leg is a non-invasive imaging test that uses X-rays to capture detailed images of your leg's bones, muscles, and blood vessels. It doesn't use contrast dye and doesn't cause any pain. It helps in diagnosing injuries or diseases.

141 services131 patients

Ct scan of arm without contrast 73200

A CT scan of the arm without contrast is a non-invasive imaging test. It uses X-ray technology to capture detailed images of your arm's structures. It doesn't involve any contrasting dye, hence, minimal preparation is required. It helps in diagnosing injuries or conditions affecting the arm.

129 services124 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

118 services116 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.

113 services110 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

111 services102 patients

Ct scan of chest without contrast 71250

A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.

110 services110 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.

75 services68 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.

73 services71 patients

Mri scan of brain without contrast 70551

An MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.

66 services66 patients

Ct scan of face without contrast 70486

A CT scan of the face without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your face, including bones, soft tissues, and blood vessels. It's often used to diagnose diseases, injuries, or abnormalities. No contrast dye is used in this procedure.

57 services57 patients

Ct scan of pelvis without contrast 72192

A CT scan of the pelvis without contrast is a non-invasive imaging test. It uses X-rays to create detailed pictures of your lower abdomen area. It helps in detecting issues like injuries, inflammation, or abnormal growths. It doesn't involve any dye injection.

57 services57 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

52 services47 patients

Mri scan of leg without contrast 73718

An MRI scan of the leg without contrast is a non-invasive imaging procedure. It uses a magnetic field and radio waves to create detailed images of the structures in your leg, such as bones, muscles, and blood vessels. No contrast dye is used.

51 services51 patients

Ct scan of blood vessels of head with contrast 70496

A CT scan of the head's blood vessels with contrast is a diagnostic procedure. A special dye (contrast) is injected into your body to make the blood vessels visible on the scan. This helps identify issues like blockages or abnormalities in your head's blood vessels.

49 services48 patients

Ct scan of blood vessels of neck with contrast 70498

A CT scan of the neck's blood vessels with contrast is a diagnostic procedure. It uses X-rays and a special dye to create detailed images of your neck's blood vessels. This helps doctors detect issues such as blockages or abnormalities.

48 services47 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

47 services47 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

43 services35 patients

Mri scan of leg before and after contrast 73720

An MRI scan of the leg involves using a magnetic field and radio waves to create detailed images of the structures within your leg. Initially, images are taken without a contrast agent. Then, a contrast agent is injected into your body to enhance the images, highlighting certain areas for closer examination.

43 services41 patients

X-ray of hand, minimum of 3 views 73130

An X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.

42 services38 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

38 services38 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

36 services36 patients

X-ray of elbow, minimum of 3 views 73080

An elbow X-ray with a minimum of 3 views is a non-invasive imaging test. It helps visualize the bones of the elbow from different angles. This aids in diagnosing conditions like fractures or arthritis. The procedure is quick, painless, and usually takes around 15 minutes.

34 services34 patients

Computed tomography (ct) of brain blood flow, volume, and timing of flow analysis with contrast 0042T

A computed tomography (CT) of brain blood flow, volume, and timing of flow analysis with contrast is a non-invasive exam. It uses X-rays and a contrast material to create detailed images of your brain. It helps evaluate blood flow patterns and detect abnormalities like clots or blockages.

31 services31 patients

Limited ultrasound scan of abdomen 76705

A limited ultrasound scan of the abdomen is a non-invasive imaging test. It uses sound waves to produce images of the abdominal organs such as the liver, gallbladder, spleen, pancreas, and kidneys. This helps to identify any abnormalities or issues.

30 services30 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

29 services29 patients

Complete ultrasound scan behind abdominal cavity 76770

A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.

29 services29 patients

X-ray of wrist, minimum of 3 views 73110

An X-ray of the wrist, minimum of 3 views, is a diagnostic procedure that uses radiation to create images of your wrist from different angles. This helps detect fractures, infections, or other abnormalities for accurate diagnosis and treatment planning.

28 services26 patients

Mri scan of leg joint before and after contrast 73723

An MRI scan of your leg joint involves using a magnetic field and radio waves to create detailed images of the structures within your joint. This process is done twice, once before and once after a contrast agent is injected. The contrast helps to highlight certain tissues for a clearer picture, aiding in diagnosis.

28 services25 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

24 services23 patients

X-ray of lower leg, 2 views 73590

An X-ray of the lower leg, 2 views, is a quick, painless test that produces images of the bones in your lower leg. It helps to identify fractures, infections, or diseases. Two different angles are used to provide a comprehensive view of the leg's structure.

23 services23 patients

Ct scan of blood vessels of abdomen and pelvis with contrast 74174

A CT scan of the abdomen and pelvis with contrast is a medical imaging procedure. A special dye, called contrast, is used to make blood vessels more visible. The scan produces detailed images of your abdomen and pelvis, helping doctors to diagnose conditions or plan treatments.

23 services23 patients

X-ray of thigh bone, minimum 2 views 73552

An X-ray of the thigh bone is a non-invasive imaging test. It involves passing a small amount of radiation through the thigh to produce images of the bone structure. At least two different angles are captured for a comprehensive view. This helps detect fractures, infections, or other abnormalities.

21 services21 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

21 services21 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

20 services20 patients

Ct scan head or brain without contrast 70450

19 services19 patients

Ct scan of middle spine without contrast 72128

A CT scan of the middle spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed pictures of your mid-spine area. This scan helps doctors identify issues like fractures, tumors, or infections. No dye is used in this procedure.

17 services17 patients

X-ray of upper arm, minimum of 2 views 73060

An X-ray of the upper arm with a minimum of 2 views involves capturing images of your arm from different angles. This helps in assessing the bones and surrounding tissues for any abnormalities or injuries. It's a quick, painless procedure.

17 services17 patients

Ct scan of head or brain before and after contrast 70470

A CT scan of the head or brain uses special X-ray equipment to create detailed images of your brain's structure. Before and after contrast means two scans are done. Initially, images are taken without a contrast dye. Then, a dye is given to highlight certain areas, providing a clearer picture.

15 services15 patients

Mri scan of pelvis without contrast 72195

An MRI scan of the pelvis without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed pictures of the lower part of your body. This helps doctors to identify any abnormalities or issues in that area.

15 services15 patients

X-ray of forearm, 2 views 73090

An X-ray of the forearm, 2 views, is a diagnostic procedure where two different pictures of your forearm are taken using a small amount of radiation. These images help doctors assess your bone health and identify any fractures, infections, or other abnormalities.

15 services14 patients

Mri scan of arm joint before and after contrast 73223

An MRI scan of your arm joint involves using a magnetic field & radio waves to create detailed images of the structures within your arm. First, images are taken without a contrast agent. Then, a safe dye is injected to highlight certain areas, providing clearer pictures for better diagnosis.

15 services14 patients

Mri scan of arm without contrast 73218

An MRI scan of the arm without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed pictures of the structures within your arm. This procedure helps in diagnosing injuries or diseases affecting muscles, bones, and joints.

14 services14 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

14 services14 patients

X-ray of ribs on side of body, minimum of 3 views 71101

This is a diagnostic procedure where a machine emits a small amount of radiation to capture images of your ribs from at least three different angles. It helps to identify issues like fractures or infections. It's a quick, painless process.

13 services13 patients

Ct scan of arm with contrast 73201

A CT scan of the arm with contrast is an imaging test. A dye (contrast) is injected into your bloodstream to make structures inside your arm more visible on images. The CT scanner uses X-rays to create detailed pictures of your arm.

12 services12 patients

Mri scan of arm before and after contrast 73220

An MRI scan of your arm, both before and after contrast, is a non-invasive imaging technique. It captures detailed pictures of structures within your arm. Initially, images are taken without a contrast agent. Then, a safe dye is injected to highlight certain tissues, making them easier to see.

12 services12 patients

Ultrasound of one leg arteries or artery grafts 93926

An ultrasound of leg arteries or artery grafts is a non-invasive test using sound waves to create images of your blood vessels. This helps doctors assess blood flow, identify blockages, and monitor the health of grafts.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

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

Union General Hospital

Acute Care Hospitals · Blairsville, GA

3/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number110051

Location35 Hospital RoadBlairsville, GA 30512 · Union County

Emergency services Birthing friendly

Wayne Memorial Hospital

Acute Care Hospitals · Jesup, GA

2/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number110124

Location865 South First StreetJesup, GA 31545 · Wayne County

Emergency services Birthing friendly

Morristown Hamblen Hospital Association

Acute Care Hospitals · Morristown, TN

3/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number440030

Location908 W 4th North StMorristown, TN 37814 · Hamblen County

Emergency services Birthing friendly

Fort Sanders Regional Medical Center

Acute Care Hospitals · Knoxville, TN

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number440125

Location1901 W Clinch AveKnoxville, TN 37916 · Knox County

Emergency services Birthing friendly

Parkwest Medical Center

Acute Care Hospitals · Knoxville, TN

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number440173

Location9352 Park West BlvdKnoxville, TN 37923 · Knox County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 37916 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$81.53 typical visit price

range $52.64 – $160.89

Typical copayment $20.38 (range $13.16 – $40.22)

Most-billed visit code 99203

Established Patient

$66.01 typical visit price

range $16.72 – $131.41

Typical copayment $16.50 (range $4.18 – $32.85)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

98.98/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

98.8

Improvement Activities

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.

SCOTT A WEGRYN MD

Radiology (Vascular & Interventional Radiology)

2001 LAUREL AVE, SUITE N304
KNOXVILLE, TN 37916

Knox County (865) 546-9484

SAMUEL H FEASTER MD

Radiology (Neuroradiology)

2001 LAUREL AVE, SUITE N304
KNOXVILLE, TN 37916

Knox County (865) 546-9484

DR. SUNG YONG BAE M.D.

Internal Medicine

2001 LAUREL AVE, SUITE 206
KNOXVILLE, TN 37916

Knox County (865) 524-3131

DR. VIJAY R. PATIL M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery)

2001 LAUREL AVE, SUITE 201
KNOXVILLE, TN 37916

Knox County (865) 522-3355

DR. WILLIAM L. JOHNSON MD

Orthopaedic Surgery

2001 LAUREL AVE, SUITE 402 NEWLAND PROFESSIONAL BLDG.
KNOXVILLE, TN 37916

Knox County (865) 632-5577

EAST TENNESSEE NEPHROLOGY PC

Internal Medicine (Nephrology)

2001 LAUREL AVE, STE 206
KNOXVILLE, TN 37916

Knox County (865) 524-3131

HEJUNG KIM MD

Radiology (Nuclear Radiology)

2001 LAUREL AVE, SUITE N304
KNOXVILLE, TN 37916

Knox County (865) 766-6870

MAUREEN THERESA CADMUS MSN APN RN

Nurse Practitioner

2001 LAUREL AVE, STE 204
KNOXVILLE, TN 37916

Knox County (865) 673-0288

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Timothy Alder's NPI number?

The NPI number for Timothy Alder is 1922207059. It was assigned to this individual provider in the NPPES registry on July 18, 2007.

Where is Timothy Alder located?

Timothy Alder practices at 2001 Laurel Ave Suite N304, Knoxville, TN 37916. The listed phone number is (865) 766-6870.

What is Timothy Alder's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Timothy Alder enrolled in Medicare?

Yes. Timothy Alder is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Timothy Alder's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Alder reassigns Medicare benefits to 5 organizations: Vista Radiology, PC. (Knoxville, TN), Columbus Diagnostic Center Inc (Columbus, GA), South Georgia Radiology Associates, LLC (Savannah, GA), Sterling Radiology LLC (Moultrie, GA) and Donalsonville Hospital Inc (Donalsonville, GA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Timothy Alder's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Timothy Alder accept?

Health plans from Blue Cross and Blue Shield of Texas list Timothy Alder as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Timothy Alder affiliated with any hospitals?

According to CMS data, Timothy Alder is affiliated with Union General Hospital, Wayne Memorial Hospital, Morristown Hamblen Hospital Association, Fort Sanders Regional Medical Center and Parkwest Medical Center.

When was this NPI record last updated?

The NPPES record for Timothy Alder was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.