MARGARET GRANT MCKERNAN MD
NPI 1275595076
Radiology - Diagnostic Radiology in El Paso, TX

Q: What is Margaret Mckernan's NPI number?

The NPI number for Margaret Mckernan is 1275595076. It was assigned to this individual provider in the NPPES registry on April 5, 2006.

Q: Where is Margaret Mckernan located?

Margaret Mckernan practices at 4815 Alameda Ave, El Paso, TX 79905. The listed phone number is (915) 215-6000.

Q: What is Margaret Mckernan's specialty?

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

Q: Is Margaret Mckernan enrolled in Medicare?

Yes. Margaret Mckernan 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.

Q: Which organizations bill Medicare for Margaret Mckernan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Mckernan reassigns Medicare benefits to 12 organizations: Texas Tech University Health Sciences Center El Paso (El Paso, TX), North Star Mcd, LLC (Willow Park, TX), Texas Radiology Associates LLP (Bedford, TX), North Star Gv, LP (Grapevine, TX), North Star Fm, LP (Flower Mound, TX) and 7 more organizations, listed in the Medicare section above. 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 Margaret Mckernan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Q: What insurance does Margaret Mckernan accept?

Health plans from Blue Cross and Blue Shield of Texas, Cigna Healthcare, Molina Healthcare and Oscar Insurance Company list Margaret Mckernan 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.

Q: Is Margaret Mckernan affiliated with any hospitals?

According to CMS data, Margaret Mckernan is affiliated with University Of Texas Medical Branch Galveston, Methodist Richardson Medical Center, Medical City Denton, Medical City Plano and Baylor Scott And White Medical Center Sunnyvale.

Q: When was this NPI record last updated?

The NPPES record for Margaret Mckernan was last updated on March 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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 April 05, 2006PECOS EnrolledAccepts Medicare Assignment

78.75/100

CMS Quality Rating

4815 ALAMEDA AVE, EL PASO, TX 79905(915) 215-6000(915) 545-6607 Get Directions Write a Review

NPPES record last updated: March 4, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 4, 2026, Feb 10, 2017 (2 updates tracked since 2017).

On this page

About Margaret Grant Mckernan Md NPPES

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

MARGARET GRANT MCKERNAN MD (NPI 1275595076) is an individual diagnostic radiology provider in El Paso, Texas, licensed in Texas (M1922) and active in the NPI registry since April 2006. She is enrolled in Medicare PECOS, is affiliated with University Of Texas Medical Branch Galveston, and maintains a secondary practice location in Honolulu.

NPPES Registry Identity

NPI1275595076

Entity TypeIndividualFemale

Primary Taxonomy2085R0202X

Provider Legal NameMARGARET GRANT MCKERNANCredential: MD

Location Address4815 ALAMEDA AVEEl Paso, TX 79905-2705

Mailing Address1820 Preston Park Blvd Ste 1825Plano, TX 75093-5215 · (972) 867-7862 · Fax (972) 612-1623

Phone(915) 215-6000

Fax(915) 545-6607

Sole ProprietorNo

Medical School CMSUniversity Of Texas Medical Branch At GalvestonGraduated 1999

Enumeration DateApril 5, 2006

Last NPPES UpdateMarch 4, 20262 updates tracked since enumeration

NPPES CertifiedMarch 4, 2026

✔ NPI 1275595076 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 TX · M1922✔ Licensed in HI · MD-13453

Definition

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

4815 ALAMEDA AVE, El Paso, TX 79905

Open in Google Maps ↗

Secondary Practice Location 1

Location 188 Piikoi St Apt 4405Honolulu, HI 96814-4286 · Phone (952) 595-1100 · Fax (612) 294-4903

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Cigna Healthcare, Molina Healthcare and more.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

Margaret Grant Mckernan 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 ID6002720596

PECOS Enrollment IDI20120126000271, I20131231001598

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 Margaret Mckernan reassigns Medicare billing to 12 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Texas Tech University Health Sciences Center El Paso

Same address

Psychiatry

4815 ALAMEDA AVE
El Paso, TX 79905

Reassigned Medicare billing, Texas enrollment
856 clinicians in this Medicare group

NPI 1124047295 (915) 545-6830

North Star Mcd, LLC

516 mi

Radiology

110 MARY LOU DRIVE, SUITE 400
Willow Park, TX 76087

Reassigned Medicare billing, Texas enrollment
206 clinicians in this Medicare group

NPI 1528766805 (972) 649-6460

Texas Radiology Associates LLP

550 mi

Diagnostic Radiology

1600 HOSPITAL PKWY
Bedford, TX 76022

Reassigned Medicare billing, Texas and Hawaii enrollments
Also billed through NPI 1083990717 (Hawaii)
209 clinicians in this Medicare group

NPI 1730419904 (866) 437-9810

North Star Gv, LP

551 mi

Radiology

2535 IRA E WOODS AVE STE 101
Grapevine, TX 76051

Reassigned Medicare billing, Hawaii and Texas enrollments
4 clinicians in this Medicare group

NPI 1922512664 (972) 649-6460

North Star Fm, LP

554 mi

Radiology

4951 LONG PRAIRIE ROAD, SUITE 105
Flower Mound, TX 75028

Reassigned Medicare billing, Hawaii enrollment
5 clinicians in this Medicare group

NPI 1174812028 (972) 899-5901

North Star Cn, LP

565 mi

Radiology

4780 N JOSEY LN
Carrollton, TX 75010

Reassigned Medicare billing, Hawaii and Texas enrollments
5 clinicians in this Medicare group

NPI 1013305945 (972) 492-1334

North Star Plano Parkway, LP

568 mi

Radiology

6101 W PLANO PKWY STE 150
Plano, TX 75093

Reassigned Medicare billing, Hawaii enrollment
4 clinicians in this Medicare group

NPI 1740601863 (972) 649-6460

North Star Mri Of Frisco LP

570 mi

Radiology

8501 WADE BLVD., SUITE 220
Frisco, TX 75034

Reassigned Medicare billing, Hawaii and Texas enrollments
5 clinicians in this Medicare group

NPI 1649356759 (214) 618-3420

North Star Fp, LP

571 mi

Radiology

11970 N CENTRAL EXPY STE 100
Dallas, TX 75243

Reassigned Medicare billing, Hawaii and Texas enrollments
5 clinicians in this Medicare group

NPI 1033630835 (972) 649-6460

North Star Diagnostic Imaging, LLC

572 mi

Radiology

3700 W 15TH ST, BUILDING D, SUITE 200
Plano, TX 75075

Reassigned Medicare billing, Hawaii and Texas enrollments
5 clinicians in this Medicare group

NPI 1467787739 (972) 758-9000

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 35

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.

714 services654 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.

248 services243 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.

223 services218 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.

177 services174 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.

135 services134 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.

113 services110 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.

98 services97 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.

62 services59 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.

56 services56 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.

46 services44 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.

43 services43 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.

40 services37 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.

38 services36 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.

38 services38 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.

36 services36 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.

33 services33 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 services25 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.

26 services24 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.

25 services24 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.

23 services22 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.

23 services22 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.

23 services22 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.

22 services22 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 services20 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.

21 services21 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.

21 services21 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.

20 services20 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.

20 services20 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.

19 services19 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.

19 services19 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.

19 services16 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.

15 services14 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.

14 services13 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.

13 services13 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.

13 services12 patients

Hospital Affiliations CMS Care Compare 5

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

University Of Texas Medical Branch Galveston

Acute Care Hospitals · Galveston, TX

3/5 CMS rating

OwnershipGovernment - State

CMS Certification Number450018

Location301 University BoulevardGalveston, TX 77555 · Galveston County

Emergency services Birthing friendly

Methodist Richardson Medical Center

Acute Care Hospitals · Richardson, TX

3/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number450537

Location2831 E President George Bush HighwayRichardson, TX 75082 · Collin County

Emergency services Birthing friendly

Medical City Denton

Acute Care Hospitals · Denton, TX

4/5 CMS rating

OwnershipProprietary

CMS Certification Number450634

Location3535 South I35 EastDenton, TX 76210 · Denton County

Emergency services

Medical City Plano

Acute Care Hospitals · Plano, TX

3/5 CMS rating

OwnershipProprietary

CMS Certification Number450651

Location3901 W 15th StPlano, TX 75075 · Collin County

Emergency services Birthing friendly

Baylor Scott And White Medical Center Sunnyvale

Acute Care Hospitals · Sunnyvale, TX

2/5 CMS rating

OwnershipProprietary

CMS Certification Number670060

Location231 South Collins RoadSunnyvale, TX 75182 · Dallas County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 79905 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

$84.92 typical visit price

range $54.84 – $166.88

Typical copayment $21.23 (range $13.71 – $41.72)

Most-billed visit code 99203

Established Patient

$68.55 typical visit price

range $17.52 – $136.11

Typical copayment $17.13 (range $4.38 – $34.02)

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.

78.75/100

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

Scored as part of a group practice

Quality

Improvement Activities

Reported Quality Measures

Appropriate Follow-up Imaging for Incidental Abdominal Lesions

Percentage of final reports for abdominal imaging studies for asymptomatic patients aged 18 years and older with one or more of the following noted incidentally with follow_up imaging recommended: - Liver lesion =< 0.5 cm - Cystic kidney lesion < 1.0 cm -…

Lower rates are better for this measure.

0%31 patients

Radiation Consideration for Adult CT: Utilization of Dose Lowering Techniques

Percentage of final reports for patients aged 18 years and older undergoing CT with documentation that one or more of the following dose reduction techniques were used: - Automated exposure control - Adjustment of the mA and/or kV according to patient size -…

100%1,180 patients

Radiology: Stenosis Measurement in Carotid Imaging Reports

Percentage of final reports for carotid imaging studies (neck magnetic resonance angiography [MRA], neck computed tomography angiography [CTA], neck duplex ultrasound, carotid angiogram) performed that include direct or indirect reference to measurements of…

100%68 patients

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

ROBIN O STEMERMAN AGACNP

Nurse Practitioner (Acute Care)