Douglas Mills, D.O.
NPI 1043519481 · Internal Medicine Physician · Park Ridge, IL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Mills, D.O. is a Internal Medicine Physician provider in Park Ridge, IL (NPI 1043519481).
Provider details
- NPI number
- 1043519481
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 125.059684 (IL)
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
15 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
591 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 | 140 | $126 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 100 | $88 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 86 | $235 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 65 | $164 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 64 | $80 |
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 |
|---|---|---|
| Pantoprazole Sodium | 280 | 91 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 173 | 170 |
| Ondansetronbrand: Ondansetron Odt | 71 | 69 |
| Omeprazole | 57 | 18 |
| Linaclotidebrand: Linzess | 49 | 11 |
| Mesalamine | 36 | — |
| Lipase/Protease/Amylasebrand: Creon |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,177 across 56 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
- 2011-03-24
- Last updated
- 2011-07-04
Frequently asked questions
- What is Douglas Mills's NPI number?
- Douglas Mills's National Provider Identifier (NPI) is 1043519481, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Mills's specialty?
- Douglas Mills is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Mills located?
- Douglas Mills's practice location on file with NPPES is 1775 W Dempster St, Park Ridge, IL 60068-1143.
- What is Douglas Mills's phone number?
- The practice phone number listed in the NPPES registry for Douglas Mills is (847) 723-5871.
- Does Douglas Mills accept Medicare?
- Douglas Mills is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Mills's NPI active?
- Yes — Douglas Mills's NPI (1043519481) is active in the NPPES registry as of the last update on 2011-07-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.