Michael R. Mills, M.D.
Gastroenterology Physician · Phoenix, AZ
Michael R. Mills, M.D. is a gastroenterology physician with a practice address in Phoenix, Arizona, and NPI 1811948359, issued on May 12, 2006. Check the license (Arizona 23704, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Michael R. Mills
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 23704 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 349 E Coronado RD, Phoenix, AZ 85004
- Phone
- (602) 266-5678
- Enumerated
- May 12, 2006
- Record last updated
- Feb 17, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (602) 264-5646
- Medicaid ID
- 334417-05 AZ
- Medicare enrollment
- Enrolled (PECOS I20041223000066); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 403 in Arizona → Look up another NPI →
Also registered at 349 E Coronado RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Julie Aulds, CRNACertified Registered Nurse Anesthetist1417984105
- Breana Baker, MSPA, PA-CPhysician Assistant1285215541
- David Drewitz, M.D.Gastroenterology Physician1174574610
- Braiden Fairbanks, PA-CPhysician Assistant1164017679
- Traci Kelly, R.N., F.N.P.Family Nurse Practitioner1912958232
- Fredrick Kenny, M.D.Gastroenterology Physician1659321297
Verify Michael R. Mills in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 23704Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% more Medicare Part D claims than the average gastroenterology physician in 2024
1,386 Medicare Part D claims for 609 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Pantoprazole Sodium488 claims
- Sod Sulf-Potass Sulf-Mag Sulf135 claims
- Sutab79 claims
- Omeprazole49 claims
- Famotidine43 claims
- Linzess37 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,000.28
82 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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 one group practice
- Arizona Digestive Health PCPhoenix, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael R. Mills among 403 gastroenterology physician records in Arizona
Michael R. Mills, M.D. is one of 403 gastroenterology physician records with a practice address in Arizona. 84% 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 17% of them.
- NPI issued2006 · 17% of these records are older, 41% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1991 · median 2001 among the 295 with a school on file
- Record last updated2017 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Arizona
There are 403 gastroenterology physician records in Arizona.
All 403 in Arizona → Every provider in Phoenix → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Shifat Ahmed, MDPhoenix, AZ 850041568881472
- Michael Altman, M.D.Phoenix, AZ 850041992777106
- David Drewitz, M.D.Phoenix, AZ 850041174574610
- Fredrick Kenny, M.D.Phoenix, AZ 850041659321297
- Bruce Noland, M.D.Phoenix, AZ 850041245280346
- Shiva Ratuapli, MDPhoenix, AZ 850041265492060
- Eugene Tharalson, M.D.Phoenix, AZ 850041346290442
- Paul Berggreen, M.D.Phoenix, AZ 850061093703605
Common questions
What is Michael R. Mills, M.D.'s NPI number?
Michael R. Mills, M.D.'s National Provider Identifier (NPI) is 1811948359, issued on May 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael R. Mills, M.D. located?
The NPPES record lists a practice address at 349 E Coronado RD, Phoenix, AZ, 85004. Phone: (602) 266-5678. Providers update this record themselves, so call before visiting.
How can I verify Michael R. Mills, M.D.'s license?
NPPES lists Arizona license number 23704, 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 R. Mills, M.D. prescribe under Medicare Part D?
In 2024, Michael R. Mills, M.D. had 1,386 Medicare Part D claims for 609 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Michael R. Mills, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.