Michael Gray, M.D.
Internal Medicine Physician · Benson, AZ
Michael Gray, M.D. is an internal medicine physician with a practice address in Benson, Arizona, and NPI 1639120520, issued on May 15, 2006. Check the license (Arizona 11623, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Michael Gray
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 11623 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 300 S Ocotillo Ave, Benson, AZ 85602
- Phone
- (520) 586-9111
- Enumerated
- May 15, 2006
- Entity
- Type 1 · individual
Also registered at 300 S Ocotillo Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Craig Ottenstein, MDInternal Medicine Physician1275658064
Verify Michael Gray in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 11623Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
82% fewer Medicare Part D claims than the average internal medicine physician in 2024
503 Medicare Part D claims for 39 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. 97 claims were for opioids.
Most prescribed
- Levothyroxine Sodium41 claims
- Albuterol Sulfate Hfa30 claims
- Oxycodone Hcl27 claims
- Cyanocobalamin Injection24 claims
- Morphine Sulfate Er24 claims
- Lisinopril22 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.
4 internal medicine physician records list a Benson practice address
They are 4 of the 95 NPPES records with a Benson practice address, and 3,429 internal medicine physician records in Arizona.
All 4 in Benson → All 3,429 in Arizona → Every provider in Benson →
Other internal medicine physician records in Arizona
- Daniel Aaronson, MDTucson, AZ1134865355
- Jaber Abawi, MDPayson, AZ1629038542
- Demsas Abay, MDPeoria, AZ1720312390
- Firas Abbas, M.D. M.P.H.Mesa, AZ1336481407
- Hassan Abbas, D.O.Mesa, AZ1477294775
- Jalal Abbas, M.D.Sun City West, AZ1205895034
- Mohemmedd Khalid AbbasPhoenix, AZ1316366651
- Tayeb Abbas, MDSun City West, AZ1093406795
- Anam Abbasi, MDPhoenix, AZ1568990695
- Hamed Abbaszadegan, MDPhoenix, AZ1407083579
Common questions
What is Michael Gray, M.D.'s NPI number?
Michael Gray, M.D.'s National Provider Identifier (NPI) is 1639120520, issued on May 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Gray, M.D. located?
The NPPES record lists a practice address at 300 S Ocotillo Ave, Benson, AZ, 85602. Phone: (520) 586-9111. Providers update this record themselves, so call before visiting.
How can I verify Michael Gray, M.D.'s license?
NPPES lists Arizona license number 11623, 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 Gray, M.D. prescribe under Medicare Part D?
In 2024, Michael Gray, M.D. had 503 Medicare Part D claims for 39 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.