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MARY L. GREBENC M.D.
NPI 1699727347
Radiology - Diagnostic Radiology in Albuquerque, NM

Active since May 17, 2006PECOS EnrolledAccepts Medicare Assignment
1 UNM, ALBUQUERQUE, NM 87131(505) 272-2525(505) 272-6055 Get Directions Write a Review

NPPES record last updated: March 10, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 10, 2025, Jul 17, 2023, Feb 1, 2023 and 1 more (4 updates tracked since 2016).

About Mary L. Grebenc M.d. NPPES

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

MARY L. GREBENC M.D. (NPI 1699727347) is an individual diagnostic radiology provider in Albuquerque, New Mexico, licensed in New Mexico (90-199) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, is affiliated with Unm Hospital, and is a graduate of University Of New Mexico School Of Medicine (1989).

NPPES Registry Identity

NPI1699727347
Entity TypeIndividualFemale
Primary Taxonomy2085R0202X
Provider Legal NameMARY L. GREBENCCredential: M.D.
Location Address1 UNMAlbuquerque, NM 87131-3616
Mailing Address800 Bradbury Dr Se Ste 116Albuquerque, NM 87106-4310 · (505) 272-1476
Phone(505) 272-2525
Fax(505) 272-6055
Sole ProprietorNo
Medical School CMSUniversity Of New Mexico School Of MedicineGraduated 1989
Enumeration DateMay 17, 2006
Last NPPES UpdateMarch 10, 20254 updates tracked since enumeration
NPPES CertifiedMarch 10, 2025
✔ NPI 1699727347 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 NM · 90-199✔ Licensed in CA · G87233
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
1 UNM, Albuquerque, NM 87131
Open in Google Maps ↗

Other Identifiers 2

Medicaid00G872330CA
Other00G872330CA · Blue Shield Pin

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

Mary L. Grebenc M.d. 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 ID6406817030
PECOS Enrollment IDI20110630000635
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

3

Medicare enrollment records show Mary Grebenc reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Unm Medical Group Inc
4.4 mi
Multi-Specialty
2211 LOMAS NE
Albuquerque, NM 87106
  • Reassigned Medicare billing, New Mexico enrollment
  • 2,105 clinicians in this Medicare group
NPI 1831218627 (505) 272-3303
Golden State Imaging Associates Inc
754 mi
Diagnostic Radiology
1401 ST JOSEPH PKWY
Houston, TX 77002
  • Reassigned Medicare billing, California enrollment
  • 244 clinicians in this Medicare group
NPI 1144872052 (888) 371-0667
Geisinger Clinic
1,682 mi
Diagnostic Radiology
100 N ACADEMY AVE
Danville, PA 17822
  • Reassigned Medicare billing, California enrollment
  • 42 clinicians in this Medicare group
NPI 1558313023 (570) 271-6211

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 16

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.
407 services297 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.
190 services186 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.
52 services50 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.
47 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.
38 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.
35 services35 patients

Hospital Affiliations CMS Care Compare

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

Unm Hospital

Acute Care Hospitals · Albuquerque, NM
2/5 CMS rating
OwnershipGovernment - State
CMS Certification Number320001
Location2211 Lomas Boulevard NEAlbuquerque, NM 87106 · Bernalillo County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 87131 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
$84.79 typical visit price
range $54.26 – $166.80
Typical copayment $21.19 (range $13.56 – $41.70)
Most-billed visit code 99203
Established Patient
$68.00 typical visit price
range $17.00 – $135.35
Typical copayment $17.00 (range $4.25 – $33.83)
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.

Other Providers at the Same Location NPPES 2

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

MARK SCHUYLER MD
Allergy & Immunology
1 UNM, MSC10 5550
ALBUQUERQUE, NM 87131
Bernalillo County (505) 925-4197
SARA ANN COMBS M.D.
Internal Medicine (Nephrology)
1 UNM, MSC 04-2785
ALBUQUERQUE, NM 87131
Bernalillo County (505) 272-0407

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 Mary Grebenc's NPI number?

The NPI number for Mary Grebenc is 1699727347. It was assigned to this individual provider in the NPPES registry on May 17, 2006.

Where is Mary Grebenc located?

Mary Grebenc practices at 1 Unm, Albuquerque, NM 87131. The listed phone number is (505) 272-2525.

What is Mary Grebenc's specialty?

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

Is Mary Grebenc enrolled in Medicare?

Yes. Mary Grebenc 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 Mary Grebenc's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Grebenc reassigns Medicare benefits to 3 organizations: Unm Medical Group Inc (Albuquerque, NM), Golden State Imaging Associates Inc (Houston, TX) and Geisinger Clinic (Danville, PA). 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 Mary Grebenc's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Mary Grebenc affiliated with any hospitals?

According to CMS data, Mary Grebenc is affiliated with Unm Hospital.

When was this NPI record last updated?

The NPPES record for Mary Grebenc was last updated on March 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.