William D. Grainger, MD
Neurology Physician · Gilbert, AZ
William D. Grainger, MD is a neurology physician with a practice address in Gilbert, Arizona, and NPI 1003963679, issued on Jan 4, 2007. Check the license (Arizona AZ15336, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- William D. Grainger
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- AZ15336 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 726 N Greenfield RD, Gilbert, AZ 85234
- Phone
- (480) 834-8885
- Enumerated
- Jan 4, 2007
- Record last updated
- Jun 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (480) 751-5724
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 458 in Arizona → Look up another NPI →
Also registered at 726 N Greenfield RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William D. Grainger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license AZ15336Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average neurology physician in 2024
27 Medicare Part D claims, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D.
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.
William D. Grainger among 458 neurology physician records in Arizona
William D. Grainger, MD is one of 458 neurology 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 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 48% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 65% of these records are
- Record last updated2021 · 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 2084N0400X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in Arizona
There are 458 neurology physician records in Arizona.
All 458 in Arizona → Every provider in Gilbert → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Dan Mirza, M.D.Gilbert, AZ 852341770557555
- Ramya Tadipatri, MDGilbert, AZ 852341386185734
- Ming-Jai Liu, M.D., PHARM.D.Gilbert, AZ 852331932211232
- Rama Narasimhan, MDChandler, AZ 852261992859987
- Hemant Pandey, MDChandler, AZ 852261275535403
- Andrea An, MDChandler, AZ 852241609826510
- Yeeshu Arora, M.D.Chandler, AZ 852241902038698
- Marianne De Lima, MDChandler, AZ 852241346683794
Common questions
What is William D. Grainger, MD's NPI number?
William D. Grainger, MD's National Provider Identifier (NPI) is 1003963679, issued on Jan 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William D. Grainger, MD located?
The NPPES record lists a practice address at 726 N Greenfield RD, Gilbert, AZ, 85234. Phone: (480) 834-8885. Providers update this record themselves, so call before visiting.
How can I verify William D. Grainger, MD's license?
NPPES lists Arizona license number AZ15336, 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 William D. Grainger, MD prescribe under Medicare Part D?
In 2024, William D. Grainger, MD had 27 Medicare Part D claims; the average among neurology physician prescribers was 1,370. 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.