Brian W. Millhollon, MD
Allergy & Immunology Physician · Phoenix, AZ
Brian W. Millhollon, MD is an allergy & immunology physician with a practice address in Phoenix, Arizona, and NPI 1841212693, issued on Jul 24, 2006. Check the license (Arizona 21604, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Brian W. Millhollon
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- 21604 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 16611 S 40TH Street, Phoenix, AZ 85048
- Phone
- (480) 705-8844
- Enumerated
- Jul 24, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (480) 705-8838
- Medicare enrollment
- Enrolled (PECOS I20050929000445); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 1982
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 88 in Arizona → Look up another NPI →
Verify Brian W. Millhollon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 21604Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
391 Medicare Part D claims for 78 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims.
Most prescribed
- Prednisone58 claims
- Azithromycin44 claims
- Albuterol Sulfate Hfa39 claims
- Azelastine Hcl33 claims
- Montelukast Sodium28 claims
- Symbicort28 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: $35.65
2 payments; by number, the most common kind was food and beverage; the largest payer was Genentech USA, Inc. The 2,496 providers of this specialty with any payment received $8,321.81 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.
Brian W. Millhollon among 88 allergy & immunology physician records in Arizona
Brian W. Millhollon, MD is one of 88 allergy & immunology physician records with a practice address in Arizona. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 20% of them.
- NPI issued2006 · 20% of these records are older, 39% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1982 · median 2001 among the 57 with a school on file
- Record last updated2023 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Arizona
There are 88 allergy & immunology physician records in Arizona.
All 88 in Arizona → Every provider in Phoenix → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Reimus Valencia, DOPhoenix, AZ 850541346690518
- Thomas Mirzai, D.O.Phoenix, AZ 850321447243886
- Michael Saavedra, MDPhoenix, AZ 850321497946685
- Jeffrey Leitner, M.D.Phoenix, AZ 850281740466549
- Alison Hoeger, PA-CPhoenix, AZ 850231689233231
- Housam Alasaly, M.D.Phoenix, AZ 850181679541957
- Fadia Habib-Khazen, MDPhoenix, AZ 850181063404531
- Cindy Bauer, M.D.Phoenix, AZ 850161639367964
Common questions
What is Brian W. Millhollon, MD's NPI number?
Brian W. Millhollon, MD's National Provider Identifier (NPI) is 1841212693, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Brian W. Millhollon, MD located?
The NPPES record lists a practice address at 16611 S 40TH Street, Phoenix, AZ, 85048. Phone: (480) 705-8844. Providers update this record themselves, so call before visiting.
How can I verify Brian W. Millhollon, MD's license?
NPPES lists Arizona license number 21604, 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 Brian W. Millhollon, MD prescribe under Medicare Part D?
In 2024, Brian W. Millhollon, MD had 391 Medicare Part D claims for 78 beneficiaries; the average among allergy & immunology physician prescribers was 741. 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.
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.