Douglas Marshall, M.D.
NPI 1477569499 · Internal Medicine Physician · Morton, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Marshall, M.D. is a Internal Medicine Physician provider in Morton, IL (NPI 1477569499).
Provider details
- NPI number
- 1477569499
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
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
20 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,409 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 650 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 489 | $122 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 382 | $16 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 212 | $171 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 172 | $123 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 114 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 518 | 143 |
| Levothyroxine Sodium | 323 | 74 |
| Omeprazole | 316 | 93 |
| Amlodipine Besylate | 241 | 60 |
| Atorvastatin Calcium | 220 | 58 |
| Losartan Potassium | 197 | 54 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-31
- Last updated
- 2007-07-08
Frequently asked questions
- What is Douglas Marshall's NPI number?
- Douglas Marshall's National Provider Identifier (NPI) is 1477569499, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Marshall's specialty?
- Douglas Marshall is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Marshall located?
- Douglas Marshall's practice location on file with NPPES is 110 N Main St, Morton, IL 61550-2024.
- What is Douglas Marshall's phone number?
- The practice phone number listed in the NPPES registry for Douglas Marshall is (309) 266-8900.
- Does Douglas Marshall accept Medicare?
- Douglas Marshall is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Marshall's NPI active?
- Yes — Douglas Marshall's NPI (1477569499) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.