Christine Amstadt, MD
NPI 1265514962 · Internal Medicine Physician · Naperville, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christine Amstadt, MD is a Internal Medicine Physician provider in Naperville, IL (NPI 1265514962).
Provider details
- NPI number
- 1265514962
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036-093359 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
716 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 | 209 | $136 |
| 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 | 145 | $17 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 131 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 97 | $138 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 32 | $192 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 61 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 238 | 65 |
| Lisinopril | 152 | 38 |
| Amlodipine Besylate | 140 | 41 |
| Levothyroxine Sodium | 125 | 37 |
| Omeprazole | 98 | 27 |
| Metformin Hcl | 92 | 23 |
| Fluticasone Propionate | 80 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-20
- Last updated
- 2018-02-19
Frequently asked questions
- What is Christine Amstadt's NPI number?
- Christine Amstadt's National Provider Identifier (NPI) is 1265514962, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christine Amstadt's specialty?
- Christine Amstadt is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Christine Amstadt located?
- Christine Amstadt's practice location on file with NPPES is 636 Raymond Dr Ste 200, Naperville, IL 60563.
- What is Christine Amstadt's phone number?
- The practice phone number listed in the NPPES registry for Christine Amstadt is (630) 355-5302.
- Does Christine Amstadt accept Medicare?
- Christine Amstadt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christine Amstadt's NPI active?
- Yes — Christine Amstadt's NPI (1265514962) is active in the NPPES registry as of the last update on 2018-02-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.