Donald W. Northfelt, M.D.
Hematology & Oncology Physician · Phoenix, AZ
Donald W. Northfelt, M.D. is a hematology & oncology physician with a practice address in Phoenix, Arizona, and NPI 1316922008, issued on Dec 14, 2005. Check the license (Arizona 30026, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Donald W. Northfelt
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- 30026 AZ
59022 CA
54262 CO
Self-reported in NPPES; status is on the state search - Practice location
- 5777 E Mayo Blvd, Phoenix, AZ 85054
- Phone
- (480) 301-8000
- Enumerated
- Dec 14, 2005
- Record last updated
- Sep 10, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100126000055); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 285 in Arizona → Look up another NPI →
Also registered at 5777 E Mayo Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Oluseyi AbidoyeHematology & Oncology Physician1780211029
- Neera Agrwal, M.D.Internal Medicine Physician1992780522
- Maria Aguilar, MDNeurology Physician1518924190
- Sophia Aguirre, MDEmergency Medicine Physician1285384859
- Erin Alexander, MS, MSGenetic Counselor (M.S.)1487541595
- Nneoma Alozie, MDInternal Medicine Physician1912642695
Verify Donald W. Northfelt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 30026Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
403 Medicare Part D claims for 102 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 33% of claims.
Most prescribed
- Letrozole61 claims
- Anastrozole50 claims
- Ibrance44 claims
- Exemestane35 claims
- Prochlorperazine Maleate26 claims
- Ondansetron Hcl21 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 78.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $31.30
1 payment: food and beverage; the largest payer was Aveo Pharmaceuticals, Inc. 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.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 3 group practices
- Dhew Ind Hlth SV Hlth Svs And Mntl Hlth AdmPhoenix, AZ
- Gila River Health Care CorporationSacaton, AZ
- Mayo Clinic ArizonaScottsdale, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Donald W. Northfelt among 285 hematology & oncology physician records in Arizona
Donald W. Northfelt, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated1985 · median 2003 among the 229 with a school on file
- Record last updated2020 · 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 Phoenix → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Oluseyi AbidoyePhoenix, AZ 850541780211029
- Rodolfo Garza Morales, MDPhoenix, AZ 850541952921413
- Talal Hilal, M.D.Phoenix, AZ 850541669813978
- Gregory Mayer, M.D.Phoenix, AZ 850541881678191
- Craig Reeder, M.D.Phoenix, AZ 850541134102536
- Mahesh Seetharam, MD, FACPPhoenix, AZ 850541487781175
- James Slack, M.D.Phoenix, AZ 850541841273588
- Tania Cortas, MDPhoenix, AZ 850281720293608
Common questions
What is Donald W. Northfelt, M.D.'s NPI number?
Donald W. Northfelt, M.D.'s National Provider Identifier (NPI) is 1316922008, issued on Dec 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Donald W. Northfelt, M.D. located?
The NPPES record lists a practice address at 5777 E Mayo Blvd, Phoenix, AZ, 85054. Phone: (480) 301-8000. Providers update this record themselves, so call before visiting.
How can I verify Donald W. Northfelt, M.D.'s license?
NPPES lists Arizona license number 30026, 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 Donald W. Northfelt, M.D. prescribe under Medicare Part D?
In 2024, Donald W. Northfelt, M.D. had 403 Medicare Part D claims for 102 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Donald W. Northfelt, M.D.'s MIPS final score?
The 2023 MIPS final score is 78.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.
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.