Christine Amstadt, MD
Internal Medicine Physician · Naperville, IL
Christine Amstadt, MD is an internal medicine physician with a practice address in Naperville, Illinois, and NPI 1265514962, issued on Oct 20, 2006. Check the license (Illinois 036-093359, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Christine Amstadt
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036-093359 IL
Self-reported in NPPES; status is on the state search - Practice location
- 636 Raymond Dr Ste 200, Naperville, IL 60563
- Phone
- (630) 355-5302
- Enumerated
- Oct 20, 2006
- Record last updated
- Feb 19, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (630) 778-6088
- Medicaid ID
- 036093359 IL
- Medicare enrollment
- Enrolled (PECOS I20040519000678); accepts Medicare assignment
- Medical or professional school
- Mid West Medical College, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 636 Raymond Dr Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Christine Amstadt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-093359Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,727 Medicare Part D claims for 254 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 69 claims were for opioids.
Most prescribed
- Atorvastatin Calcium238 claims
- Lisinopril152 claims
- Amlodipine Besylate140 claims
- Levothyroxine Sodium125 claims
- Omeprazole98 claims
- Metformin Hcl92 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Central Dupage Physician GroupWheaton, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christine Amstadt among 7,238 internal medicine physician records in Illinois
Christine Amstadt, MD is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1993 · median 2003 among the 3,580 with a school on file
- Record last updated2018 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
75 internal medicine physician records list a practice address in Naperville
They are 75 of the 4,634 NPPES records with a practice address in Naperville, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Naperville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rohini Bhat, MDNaperville, IL 605631700988706
- Mary Dea, DONaperville, IL 605631518951474
- Barbara Emery-Stolzer, MDNaperville, IL 605631982698841
- Peter Furey, M.D.Naperville, IL 605631609859289
- Cicily Jones, MDNaperville, IL 605631255396511
- Mary King, MDNaperville, IL 605631649246729
- Francine Long, MDNaperville, IL 605631063406924
- William Mollohan, D.O.Naperville, IL 605631720006919
Common questions
What is Christine Amstadt, MD's NPI number?
Christine Amstadt, MD's National Provider Identifier (NPI) is 1265514962, issued on Oct 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Christine Amstadt, MD located?
The NPPES record lists a practice address at 636 Raymond Dr Ste 200, Naperville, IL, 60563. Phone: (630) 355-5302. Providers update this record themselves, so call before visiting.
How can I verify Christine Amstadt, MD's license?
NPPES lists Illinois license number 036-093359, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Christine Amstadt, MD prescribe under Medicare Part D?
In 2024, Christine Amstadt, MD had 2,727 Medicare Part D claims for 254 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Christine Amstadt, MD's MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.