Douglas Lillie, MD
NPI 1811004369 · Internal Medicine Physician · West Allis, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Lillie, MD is a Internal Medicine Physician provider in West Allis, WI (NPI 1811004369).
Provider details
- NPI number
- 1811004369
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 30235 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,310 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 364 | $84 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 301 | $119 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 198 | $122 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 107 | $66 |
| Administration of Influenza Virus VaccineG0008 | 77 | $30 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 191 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,107 | 274 |
| Amlodipine Besylate | 987 | 244 |
| Losartan Potassium | 735 | 183 |
| Levothyroxine Sodium | 525 | 128 |
| Metoprolol Succinate | 471 | 127 |
| Lisinopril | 413 | 104 |
| Hydrochlorothiazide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-23
- Last updated
- 2025-06-05
- Certified
- 2025-06-05
Frequently asked questions
- What is Douglas Lillie's NPI number?
- Douglas Lillie's National Provider Identifier (NPI) is 1811004369, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Lillie's specialty?
- Douglas Lillie is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Lillie located?
- Douglas Lillie's practice location on file with NPPES is 2424 S 90th St, West Allis, WI 53227-2455.
- What is Douglas Lillie's phone number?
- The practice phone number listed in the NPPES registry for Douglas Lillie is (414) 328-8700.
- Does Douglas Lillie accept Medicare?
- Douglas Lillie is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Lillie's NPI active?
- Yes — Douglas Lillie's NPI (1811004369) is active in the NPPES registry as of the last update on 2025-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.