Gigi Ip, MD
Internal Medicine Physician · Downers Grove, IL
Gigi Ip, MD is an internal medicine physician with a practice address in Downers Grove, Illinois, and NPI 1376519777, issued on Feb 24, 2006. Check the license (Illinois 036100745, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gigi Ip
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036100745 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5207 Main St, Downers Grove, IL 60515
- Phone
- (630) 435-9888
- Enumerated
- Feb 24, 2006
- Record last updated
- Aug 8, 2023
- Fax
- (630) 963-1524
- Medicaid ID
- 036100745 IL
- Medicare enrollment
- Enrolled (PECOS I20040127000221); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1997
- 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 5207 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gigi Ip 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 036100745Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average internal medicine physician in 2024
7,192 Medicare Part D claims for 797 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 154 claims were for opioids.
Most prescribed
- Atorvastatin Calcium454 claims
- Rosuvastatin Calcium427 claims
- Levothyroxine Sodium384 claims
- Amlodipine Besylate345 claims
- Losartan Potassium257 claims
- Metformin Hcl230 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.
Bills Medicare through one group practice
- Dupage Medical Group LtdDowners Grove, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gigi Ip among 7,238 internal medicine physician records in Illinois
Gigi Ip, 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
- Graduated1997 · median 2003 among the 3,580 with a school on file
- Record last updated2023 · 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).
33 internal medicine physician records list a practice address in Downers Grove
They are 33 of the 1,899 NPPES records with a practice address in Downers Grove, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Downers Grove → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Susan Badri, M.D.Downers Grove, IL 605151912985722
- Robert King, MDDowners Grove, IL 605151104892041
- David Labotka, MDDowners Grove, IL 605151205803178
- Barbara Loeb, MDDowners Grove, IL 605151619976396
- Monica Martin, MDDowners Grove, IL 605151881693315
- Richard McPartlin, MDDowners Grove, IL 605151700853140
- Maziyar Mirhosseini, M.D.Downers Grove, IL 605151508870809
- Steven Schmitz, MDDowners Grove, IL 605151720056302
Common questions
What is Gigi Ip, MD's NPI number?
Gigi Ip, MD's National Provider Identifier (NPI) is 1376519777, issued on Feb 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gigi Ip, MD located?
The NPPES record lists a practice address at 5207 Main St, Downers Grove, IL, 60515. Phone: (630) 435-9888. Providers update this record themselves, so call before visiting.
How can I verify Gigi Ip, MD's license?
NPPES lists Illinois license number 036100745, 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 Gigi Ip, MD prescribe under Medicare Part D?
In 2024, Gigi Ip, MD had 7,192 Medicare Part D claims for 797 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.