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

REX A PARKER III MD
NPI 1790902872
Radiology - Diagnostic Radiology in Baltimore, MD

Q: What is Rex Parker's NPI number?

The NPI number for Rex Parker is 1790902872. It was assigned to this individual provider in the NPPES registry on April 19, 2007.

Q: What is Rex Parker'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 Rex Parker was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 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 19, 2007PECOS Enrolled

91.89/100

CMS Quality Rating

600 N WOLFE ST, BALTIMORE, MD 21287(410) 955-5000 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 29, 2026, Jun 4, 2026, May 19, 2026 and 5 more (8 updates tracked since 2021).

On this page

About Rex A Parker Iii Md NPPES

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

REX A PARKER III MD (NPI 1790902872) is an individual diagnostic radiology provider in Baltimore, Maryland, licensed in Maryland (D0105968) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS, is affiliated with University Of Kansas Hospital, and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1790902872

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameREX A PARKER IIICredential: MD

Location Address600 N WOLFE STBaltimore, MD 21287-0005

Mailing Address6201 Greenleigh AveMiddle River, MD 21220-2004 · (410) 955-5000

Phone(410) 955-5000

Sole ProprietorNo

Medical School CMSOtherGraduated 2006

Enumeration DateApril 19, 2007

Last NPPES UpdateSeptember 29, 20268 updates tracked since enumeration

NPPES CertifiedSeptember 29, 2026

✔ NPI 1790902872 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 MD · D0105968✔ Licensed in MA · 1027219✔ Licensed in MO · 2011003942✔ Licensed in MO · 2023004921✔ Licensed in NH · 39575✔ Licensed in IL · 036127404

Definition

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

600 N WOLFE ST, Baltimore, MD 21287

Open in Google Maps ↗

Secondary Practice Locations 4

Location 155 Lake Ave NWorcester, MA 01655-0002 · Phone (508) 334-3850 · Fax (508) 334-3947

Location 23901 Rainbow BlvdKansas City, KS 66160-5260 · Phone (408) 315-9341

Location 31 Medical Center DrLebanon, NH 03756-0001 · Phone (602) 650-5000 · Fax (603) 640-1228

Location 4676 N Saint Clair St Ste 800Chicago, IL 60611-2978 · Phone (312) 695-5753 · Fax (312) 695-5645

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Taro Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Rex A Parker Iii Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5294910394

PECOS Enrollment IDI20110505000568, I20221004003605, I20260528003356

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 Rex Parker reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Johns Hopkins University

Same address

Body Imaging

600 N WOLFE ST
Baltimore, MD 21205

Reassigned Medicare billing, Missouri enrollment
6 clinicians in this Medicare group

NPI 1093796609 (410) 356-8186

Umass Memorial Medical Group, Inc.

316 mi

Urgent Care

78 SUTTON AVE
Oxford, MA 01540

Reassigned Medicare billing, Massachusetts and Missouri enrollments
2,902 clinicians in this Medicare group

NPI 1982381018 (508) 499-1760

Dartmouth-Hitchcock Clinic

337 mi

Rehabilitation, Substance Use Disorder

24 RAILROAD ST
Keene, NH 03431

Reassigned Medicare billing, New Hampshire enrollment
2,999 clinicians in this Medicare group

NPI 1174176861 (603) 354-5400

Mary Hitchcock Memorial Hospital

376 mi

Psychiatric Hospital

218 EAST RD
Hampstead, NH 03841

Reassigned Medicare billing, New Hampshire and Missouri enrollments
Also billed through NPI 1023092053 (Missouri)
2,620 clinicians in this Medicare group

NPI 1699584219 (603) 650-5000

Kansas University Physicians Inc

966 mi

Obstetrics & Gynecology

4000 CAMBRIDGE ST
Kansas City, KS 66160

Reassigned Medicare billing, Kansas and Missouri enrollments
2,139 clinicians in this Medicare group

NPI 1053457978 (913) 588-1227

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 32

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.

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.

434 services416 patients

Ct scan of abdomen and pelvis with contrast 74177

334 services319 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.

325 services309 patients

Ct scan of chest with contrast 71260

280 services272 patients

Mri scan of abdomen before and after contrast 74183

An MRI scan of the abdomen before and after contrast provides detailed images of your abdominal organs. Initially, images are taken without a contrast agent. Then, a safe dye is administered, usually via an IV, to highlight certain areas, giving a clearer picture to help diagnose various conditions.

138 services136 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.

135 services133 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.

110 services92 patients

Mri scan of pelvis before and after contrast 72197

An MRI scan of the pelvis before and after contrast is a non-invasive imaging technique. It uses magnetic fields and radio waves to capture detailed images of your lower abdomen. Contrast dye, safe for the body, improves image clarity. This helps detect abnormalities more accurately.

108 services107 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.

107 services105 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.

92 services90 patients

Ct scan of abdomen before and after contrast 74170

A CT scan of the abdomen before and after contrast is a diagnostic procedure. It involves taking detailed images of your abdomen area. Initially, images are taken without a contrast agent. Then, a contrast dye is given to highlight specific areas inside your body, helping to provide clearer images for better diagnosis.

46 services45 patients

Ct scan of abdomen and pelvis without contrast 74176

45 services45 patients

Ct scan of abdomen and pelvis before and after contrast 74178

A CT scan of your abdomen and pelvis with and without contrast helps visualize your internal organs better. Contrast is a special dye that improves the clarity of the images. It's taken orally or injected into your veins before the scan. The process is painless and quick.

44 services44 patients

Ct scan of abdomen and pelvis before and after contrast 74178

40 services38 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.

39 services37 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.

38 services38 patients

Imaging for evaluation of swallowing function 74230

This process, known as a swallowing study, uses imaging technology to view how food and liquid move from your mouth to your stomach. It helps identify any issues you may have swallowing, which can be crucial for determining the best treatment plan.

37 services37 patients

Ct scan of abdomen before and after contrast 74170

33 services32 patients

Mri scan of abdomen before and after contrast 74183

33 services31 patients

Ct scan of chest without contrast 71250

29 services28 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.

25 services25 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.

18 services18 patients

X-ray of abdomen, 2 views 74019

An X-ray of the abdomen, 2 views, is a non-invasive imaging test. It uses a small amount of radiation to capture pictures of the structures inside your belly. The two views provide different angles, helping doctors see your organs clearly and detect any issues.

17 services16 patients

Nuclear medicine study from skull base to mid-thigh with ct scan 78815

A nuclear medicine study from skull base to mid-thigh with a CT scan involves using a small amount of radioactive material and CT imaging to examine body tissues and organs. This helps detect any abnormalities by providing detailed images of the body's internal structure.

17 services17 patients

Single contrast x-ray of esophagus 74220

A single contrast x-ray of the esophagus is a non-invasive procedure where a radiopaque substance is swallowed to highlight the esophagus. This allows doctors to capture clear images of the area, aiding in the diagnosis of any abnormalities or issues.

15 services15 patients

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.

14 services12 patients

Ct scan of abdomen with contrast 74160

A CT scan of the abdomen with contrast is a diagnostic procedure. A special dye (contrast) is introduced into your body to highlight certain areas in the images. The CT scanner uses X-rays to create detailed pictures of your abdomen, helping doctors diagnose conditions or monitor treatment.

14 services14 patients

Ct scan of abdomen with contrast 74160

14 services13 patients

Nuclear medicine study from skull base to mid-thigh with ct scan 78815

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

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

12 services12 patients

Mri scan of abdomen without contrast 74181

An MRI scan of the abdomen without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed pictures of your abdominal organs. This procedure doesn't involve radiation or dye injection.

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.

University Of Kansas Hospital

Acute Care Hospitals · Kansas City, KS

5/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number170040

Location4000 Cambridge StreetKansas City, KS 66160 · Wyandotte County

Emergency services Birthing friendly

University Of Ks Hlth System Great Bend Campus

Acute Care Hospitals · Great Bend, KS

3/5 CMS rating

OwnershipProprietary

CMS Certification Number170191

Location514 Cleveland StreetGreat Bend, KS 67530 · Barton County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21287 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

$94.08 typical visit price

range $60.73 – $183.44

Typical copayment $23.52 (range $15.18 – $45.86)

Most-billed visit code 99203

Established Patient

$75.47 typical visit price

range $19.60 – $149.17

Typical copayment $18.86 (range $4.90 – $37.29)

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.

91.89/100

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

Scored through an Alternative Payment Model

Quality

75.17

Promoting Interoperability

100

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.

PAMELA KIMZEY DONOHUE SCD, PA-C

Physician Assistant (Medical)

600 N WOLFE ST, NELSON 2-133
BALTIMORE, MD 21287

Baltimore City (410) 955-5232

MR. CHRISTOPHER DAVID SCHRIEBER M.S., PA-C

Physician Assistant

600 N WOLFE ST, MARBURG B-186
BALTIMORE, MD 21287

Baltimore City (410) 955-8708

DR. SABRINA CHRISTINE SOPHA M.D.

Pathology (Anatomic Pathology & Clinical Pathology)

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-3580

SANDRA KING D.H.

Dental Hygienist

600 N WOLFE ST, BLALOCK 266
BALTIMORE, MD 21287

Baltimore City (410) 955-6662

THERESA J RUDDY C.P.N.P., CRNP

Nurse Practitioner (Acute Care)

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-5260

DR. SUMAN PAUL M.B.B.S, PHD

Internal Medicine (Medical Oncology)

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-5000

MS. SARAH CATHERINE COLLICA

Psychiatry & Neurology (Psychiatry)

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (443) 287-4701

JEFF S EHRESMAN

Student in an Organized Health Care Education/Training Program

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-5000

KAITLYN MARIE FRAZIER MD

Otolaryngology

600 N WOLFE ST, JOHNS HOPKINS HOSPITAL, DEPT OF OTOLARYNGOLOGY
BALTIMORE, MD 21287

Baltimore City (410) 955-5000

CAROLINE FRANCES PLOTT MS

Student in an Organized Health Care Education/Training Program

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-3080

BRIAN TRAN PHARMD

Pharmacist (Ambulatory Care)

600 N WOLFE ST, CARNEGIE BLDG ROOM 180
BALTIMORE, MD 21287

Baltimore City (678) 879-3126

EMAD MUHAMMED ALI IBRAHIM

Student in an Organized Health Care Education/Training Program

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-5000

AARON DOBBINS

Student in an Organized Health Care Education/Training Program

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-9790

ETHAN THIO

Student in an Organized Health Care Education/Training Program

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-5000

ALEXANDRA JADE DAVIS

Student in an Organized Health Care Education/Training Program

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-5000

ARIE CALEB VAN WIEREN

Student in an Organized Health Care Education/Training Program

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-5000

MS. ANA C ZEGHIBE

Student in an Organized Health Care Education/Training Program

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-5000

MURPHY KENNY

Student in an Organized Health Care Education/Training Program

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-5000

DR. PRADEEP Y RAMULU MD

Ophthalmology

600 N WOLFE ST
BALTIMORE, MD 21287

Baltimore City (410) 955-6052

LEISHA EMENS

Internal Medicine (Medical Oncology)

600 N WOLFE ST, SUITE 4628
BALTIMORE, MD 21287

Baltimore City (410) 955-8964

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 Rex Parker's NPI number?

The NPI number for Rex Parker is 1790902872. It was assigned to this individual provider in the NPPES registry on April 19, 2007.

Where is Rex Parker located?

Rex Parker practices at 600 N Wolfe St, Baltimore, MD 21287. The listed phone number is (410) 955-5000.

What is Rex Parker's specialty?

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

Is Rex Parker enrolled in Medicare?

Yes. Rex Parker is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Rex Parker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Rex Parker reassigns Medicare benefits to 5 organizations: Johns Hopkins University (Baltimore, MD), Umass Memorial Medical Group, Inc. (Oxford, MA), Dartmouth-Hitchcock Clinic (Keene, NH), Mary Hitchcock Memorial Hospital (Hampstead, NH) and Kansas University Physicians Inc (Kansas City, KS). 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 Rex Parker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Rex Parker accept?

Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Rex Parker 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 Rex Parker affiliated with any hospitals?

According to CMS data, Rex Parker is affiliated with University Of Kansas Hospital and University Of Ks Hlth System Great Bend Campus.

When was this NPI record last updated?

The NPPES record for Rex Parker was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 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.