Douglas Ambler, MD
NPI 1154343689 · Internal Medicine Physician · Wheaton, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Ambler, MD is a Internal Medicine Physician provider in Wheaton, IL (NPI 1154343689).
Provider details
- NPI number
- 1154343689
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036097066 (IL)
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
2,477 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 588 | $135 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 421 | $138 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 346 | $133 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 214 | $113 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 153 | $9 |
| 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'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 139 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 543 | 117 |
| Atorvastatin Calcium | 501 | 117 |
| Amlodipine Besylate | 409 | 88 |
| Rosuvastatin Calcium | 292 | 107 |
| Simvastatin | 217 | 54 |
| Memantine Hcl | 203 | 26 |
| Metoprolol Succinate | 202 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-24
- Last updated
- 2019-11-05
Frequently asked questions
- What is Douglas Ambler's NPI number?
- Douglas Ambler's National Provider Identifier (NPI) is 1154343689, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Ambler's specialty?
- Douglas Ambler is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Ambler located?
- Douglas Ambler's practice location on file with NPPES is 7 Blanchard Cir Ste 206, Wheaton, IL 60189-2039.
- What is Douglas Ambler's phone number?
- The practice phone number listed in the NPPES registry for Douglas Ambler is (630) 653-0848.
- Does Douglas Ambler accept Medicare?
- Douglas Ambler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Ambler's NPI active?
- Yes — Douglas Ambler's NPI (1154343689) is active in the NPPES registry as of the last update on 2019-11-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.