NPPES file of Aug 9, 2026

Karen M. Gremminger, M.D.

Hematology & Oncology Physician · Globe, AZ

Karen M. Gremminger, M.D. is a hematology & oncology physician with a practice address in Globe, Arizona, and NPI 1174668404, issued on Feb 21, 2007. Check the license (Arizona 64504, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1174668404
Name
Karen M. Gremminger
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License numbers
64504 AZ
38760 WI
Self-reported in NPPES; status is on the state search
Practice location
5880 S Hospital Dr, Globe, AZ 85501
Phone
(928) 425-3261
Enumerated
Feb 21, 2007
Record last updated
Jun 13, 2025
Medicaid IDs
098945 AZ
32367700 WI
Medicare enrollment
Enrolled (PECOS I20211012002914); accepts Medicare assignment
Medical or professional school
Texas Tech University Health Science Center School Of Medicine, 1991
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest hematology & oncology physician records → All 285 in Arizona → Look up another NPI →

Also registered at 5880 S Hospital Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jacob Albin, PHARMDPharmacist1871197442
  2. Brittany Amado, FNP-CPrimary Care Nurse Practitioner1609488204
  3. Susan Appleton, CRNACertified Registered Nurse Anesthetist1760443337
  4. Carlin Bartschi, MDEmergency Medicine Physician1932328325
  5. Kristin Berner, P.T., D.P.TPhysical Therapist1164726691
  6. Gretchen Boise, MDEmergency Medical Services (Emergency Medicine) Physician1780891929

Verify Karen M. Gremminger in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersArizona Medical Board
    Search for license 64504    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Arizona license search

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26% fewer Medicare Part D claims than the average hematology & oncology physician in 2024

649 Medicare Part D claims for 111 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims. 72 claims were for opioids.

  1. Karen Gremminger649
  2. Specialty average877

Most prescribed

  1. Dexamethasone31 claims
  2. Imbruvica31 claims
  3. Tamoxifen Citrate28 claims
  4. Levothyroxine Sodium25 claims
  5. Eliquis24 claims
  6. Prednisone22 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $358.99

16 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Karen Gremminger$358.99
  2. Specialty average$7,481.41

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

2 hospital affiliations

  1. Cobre Valley Regional Medical CenterGlobe, AZ · Critical Access Hospitals2 of 5 stars
  2. San Carlos Apache Healthcare CorporationPeridot, AZ · Critical Access Hospitals

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Karen M. Gremminger among 285 hematology & oncology physician records in Arizona

Karen M. Gremminger, M.D. is one of 285 hematology & oncology physician records with a practice address in Arizona. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 42% of them.

  • NPI issued2007 · 42% of these records are older, 48% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 80% of these records are
  • Graduated1991 · median 2003 among the 229 with a school on file
  • Record last updated2025 · 37% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in Arizona

There are 285 hematology & oncology physician records in Arizona.

All 285 in Arizona → Every provider in Globe → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. Firas Shadad, MDGoodyear, AZ 853951942257506
  2. Aaron SidhuGoodyear, AZ 853951740939651
  3. Anjali Iyengar, M.DAvondale, AZ 853921427243088
  4. Ziyang Liu, MDAvondale, AZ 853921477972776
  5. Govardhanan Nagaiah, MDAvondale, AZ 853921386736585
  6. Christine Saraceni, D.OAvondale, AZ 853921659607844
  7. Darshil Shah, MDAvondale, AZ 853921710192489
  8. Rossa Khalaf, MDGreen Valley, AZ 856141154676146

Common questions

What is Karen M. Gremminger, M.D.'s NPI number?

Karen M. Gremminger, M.D.'s National Provider Identifier (NPI) is 1174668404, issued on Feb 21, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Karen M. Gremminger, M.D. located?

The NPPES record lists a practice address at 5880 S Hospital Dr, Globe, AZ, 85501. Phone: (928) 425-3261. Providers update this record themselves, so call before visiting.

How can I verify Karen M. Gremminger, M.D.'s license?

NPPES lists Arizona license number 64504, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Karen M. Gremminger, M.D. prescribe under Medicare Part D?

In 2024, Karen M. Gremminger, M.D. had 649 Medicare Part D claims for 111 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.