Michael Mills, M.D.
NPI 1811948359 · Gastroenterology Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Mills, M.D. is a Gastroenterology Physician provider in Phoenix, AZ (NPI 1811948359).
Provider details
- NPI number
- 1811948359
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 23704 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,344 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 421 | $123 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 137 | $240 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 131 | $87 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 104 | $148 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 101 | $161 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 488 | 188 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 135 | 133 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 79 | 79 |
| Omeprazole | 49 | 21 |
| Famotidine | 43 | 20 |
| Linaclotidebrand: Linzess | 37 | 19 |
| Colestipol Hcl | 36 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,000 across 82 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-12
- Last updated
- 2017-02-17
Frequently asked questions
- What is Michael Mills's NPI number?
- Michael Mills's National Provider Identifier (NPI) is 1811948359, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Mills's specialty?
- Michael Mills is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Mills located?
- Michael Mills's practice location on file with NPPES is 349 E Coronado Rd, Phoenix, AZ 85004-1525.
- What is Michael Mills's phone number?
- The practice phone number listed in the NPPES registry for Michael Mills is (602) 266-5678.
- Does Michael Mills accept Medicare?
- Michael Mills is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Mills's NPI active?
- Yes — Michael Mills's NPI (1811948359) is active in the NPPES registry as of the last update on 2017-02-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.