Michael Gray, M.D.
NPI 1639120520 · Internal Medicine Physician · Benson, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Gray, M.D. is a Internal Medicine Physician provider in Benson, AZ (NPI 1639120520).
Provider details
- NPI number
- 1639120520
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 11623 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 41 | 11 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 30 | — |
| Oxycodone Hcl | 27 | — |
| Cyanocobalamin (vitamin B-12)brand: Cyanocobalamin Injection | 24 | — |
| Morphine Sulfatebrand: Morphine Sulfate Er | 24 | — |
| Lisinopril | 22 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-15
- Last updated
- 2013-06-18
Frequently asked questions
- What is Michael Gray's NPI number?
- Michael Gray's National Provider Identifier (NPI) is 1639120520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Gray's specialty?
- Michael Gray is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Gray located?
- Michael Gray's practice location on file with NPPES is 300 S Ocotillo Ave, Benson, AZ 85602-6401.
- What is Michael Gray's phone number?
- The practice phone number listed in the NPPES registry for Michael Gray is (520) 586-9111.
- Does Michael Gray accept Medicare?
- Michael Gray is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Gray's NPI active?
- Yes — Michael Gray's NPI (1639120520) is active in the NPPES registry as of the last update on 2013-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.