Dr. Christopher M. Kellogg, MD
Hematology & Oncology (Hematology & Oncology Physician)
695 S Dobson Rd
Chandler, AZ 85224
Who else practices at this address →
Maricopa County includes primary care (13% of residents) and dental (0% of residents) and mental health (4% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- Wayne State University School of Medicine (1986)
- Years since graduation
- 40
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 527
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1986Medical school: Wayne State University School of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Hematology & Oncology Physician primary
AZ license 23612
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Chandler Regional Medical Center Chandler, AZ
- Mercy Gilbert Medical Center Gilbert, AZ
Medical groups
- Ironwood Physicians PC (116 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 527
- Services billed
- 112,649
- Patients’ average age
- 77
| Service | Times | Patients |
|---|---|---|
| Injection, pembrolizumab, 1 mg | 17,000 | 13 |
| Injection, dexamethasone sodium phosphate, 1 mg | 1,102 | 18 |
| Injection, palonosetron hcl, 25 mcg | 990 | 17 |
| Established patient office or other outpatient visit, 20-29 minutes | 984 | 459 |
| Administration of chemotherapy into vein, 1 hour or less | 341 | 35 |
| Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less | 223 | 26 |
| Injection of additional new drug or substance into vein | 121 | 19 |
| Telephone medical discussion with physician, 5-10 minutes | 89 | 63 |
| New patient office or other outpatient visit, 30-44 minutes | 76 | 76 |
| Administration of additional new drug or substance into vein, 1 hour or less | 71 | 12 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Letrozole Other prescribers in Chandler, AZ | 105 |
| Eliquis (apixaban) Other prescribers in Chandler, AZ | 68 |
| Acyclovir Other prescribers in Chandler, AZ | 50 |
| Oxycodone-Acetaminophen (oxycodone hcl/acetaminophen) Other prescribers in Chandler, AZ | 50 |
| Imatinib Mesylate | 48 |
| Hydroxyurea Other prescribers in Chandler, AZ | 48 |
| Calquence (acalabrutinib maleate) | 45 |
| Ondansetron Odt (ondansetron) Other prescribers in Chandler, AZ | 41 |
| Prednisone Other prescribers in Chandler, AZ | 40 |
| Dexamethasone Other prescribers in Chandler, AZ | 39 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 9 companies reported 30 payments worth $643 in total to this clinician.
| Janssen Biotech, Inc. | $140 |
|---|---|
| Novartis Pharmaceuticals Corporation | $132 |
| Celgene Corporation | $92.72 |
| Array Biopharma Inc | $79.00 |
| AbbVie Inc. | $62.75 |
| GlaxoSmithKline, LLC. | $49.61 |
| Pfizer Inc. | $37.39 |
| Daiichi Sankyo Inc. | $29.72 |
| Food and Beverage | $544 |
|---|---|
| Education | $99.00 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Janssen Biotech, Inc. Jan 15, 2025 | Education DARZALEX · Oncology · in-kind | $99.00 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.