Michael Castro, MD
Internal Medicine Physician · Glendale, AZ
Michael Castro, MD is an internal medicine physician with a practice address in Glendale, Arizona, and NPI 1639170293, issued on Aug 4, 2005. Check the license (Arizona 23581, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Michael Castro
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 23581 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 18275 N 59TH Ave, Glendale, AZ 85308
- Phone
- (602) 564-0078
- Enumerated
- Aug 4, 2005
- Record last updated
- Oct 4, 2023
- Fax
- (602) 564-1154
- Medicaid ID
- 382250 AZ
- Medicare enrollment
- Enrolled (PECOS I20040618001331); accepts Medicare assignment
- Medical or professional school
- University Of Puerto Rico School Of Medicine, 1994
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 18275 N 59TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Castro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 23581Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% more Medicare Part D claims than the average internal medicine physician in 2024
4,539 Medicare Part D claims for 482 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Rosuvastatin Calcium357 claims
- Atorvastatin Calcium306 claims
- Losartan Potassium261 claims
- Amlodipine Besylate187 claims
- Levothyroxine Sodium154 claims
- Metformin Hcl Er117 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: $2,207.75
41 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Banner Hospital Based Physicians Arizona LLCPhoenix, AZ
- Banner Primary Care Physicians Arizona LLCSurprise, AZ
- Bhsm Rehabilitation LLCPeoria, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Castro among 2,853 internal medicine physician records in Arizona
Michael Castro, MD is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% 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, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1994 · median 2003 among the 1,643 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 207R00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
90 internal medicine physician records list a practice address in Glendale
They are 90 of the 5,447 NPPES records with a practice address in Glendale, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Glendale → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Hala Abubakr, M.D.Glendale, AZ 853081780676437
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- James Ames, MDGlendale, AZ 853081811998933
- Michael Berman, DOGlendale, AZ 853081285635078
- Pinakin Bhakta, M.D.Glendale, AZ 853081760438618
- Gregory Gargiulo, D.O.Glendale, AZ 853081043248834
- Khwaja Haque, MDGlendale, AZ 853081538155379
- Pradipkumar Patel, M.D.Glendale, AZ 853081578506465
Common questions
What is Michael Castro, MD's NPI number?
Michael Castro, MD's National Provider Identifier (NPI) is 1639170293, issued on Aug 4, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Michael Castro, MD located?
The NPPES record lists a practice address at 18275 N 59TH Ave, Glendale, AZ, 85308. Phone: (602) 564-0078. Providers update this record themselves, so call before visiting.
How can I verify Michael Castro, MD's license?
NPPES lists Arizona license number 23581, 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 Michael Castro, MD prescribe under Medicare Part D?
In 2024, Michael Castro, MD had 4,539 Medicare Part D claims for 482 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.