Phillip Ahn, M.D.
Family Medicine Physician · Chicago, IL
Phillip Ahn, M.D. is a family medicine physician with a practice address in Chicago, Illinois, and NPI 1376527879, issued on Nov 30, 2005. Check the license (Illinois 036089338, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Phillip Ahn
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 036089338 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4321 S Pulaski RD, Chicago, IL 60632
- Phone
- (773) 585-2410
- Enumerated
- Nov 30, 2005
- Record last updated
- Mar 29, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (773) 284-0913
- Medicaid ID
- 036089338 / 02 IL
- Medicare enrollment
- Enrolled (PECOS I20100714000278); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1992
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 4321 S Pulaski RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rita Melgarejo-Glaab, MDFamily Medicine Physician1467400721
Verify Phillip Ahn 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 036089338Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average family medicine physician in 2024
1,242 Medicare Part D claims for 122 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Atorvastatin Calcium84 claims
- Rosuvastatin Calcium54 claims
- Amlodipine Besylate53 claims
- Metformin Hcl50 claims
- Albuterol Sulfate Hfa49 claims
- Metoprolol Succinate46 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): 97.7 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).
Industry payments in 2024: $507.94
7 payments; by number, the most common kind was food and beverage; the largest payer was Otsuka America Pharmaceutical, Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- University OF ChicagoChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Phillip Ahn among 6,215 family medicine physician records in Illinois
Phillip Ahn, M.D. is one of 6,215 family medicine physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1992 · median 2006 among the 3,714 with a school on file
- Record last updated2016 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,593 family medicine physician records list a practice address in Chicago
They are 1,593 of the 63,379 NPPES records with a practice address in Chicago, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Chicago → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Robyn Garcia, M.D.Chicago, IL 606321932195336
- Bernardino Garcia, M.D.Chicago, IL 606321669468062
- Carlos Gonzalez, MDChicago, IL 606321225170749
- Ryszard Marchel, MDChicago, IL 606321376646984
- Rita Melgarejo-Glaab, MDChicago, IL 606321467400721
- Ezequiel Mendez-Huerta, MDChicago, IL 606321396842829
- Candace Nowak, D.O.Chicago, IL 606321871571661
- Anna Nowobilska, MDChicago, IL 606321255373866
Common questions
What is Phillip Ahn, M.D.'s NPI number?
Phillip Ahn, M.D.'s National Provider Identifier (NPI) is 1376527879, issued on Nov 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Phillip Ahn, M.D. located?
The NPPES record lists a practice address at 4321 S Pulaski RD, Chicago, IL, 60632. Phone: (773) 585-2410. Providers update this record themselves, so call before visiting.
How can I verify Phillip Ahn, M.D.'s license?
NPPES lists Illinois license number 036089338, 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 Phillip Ahn, M.D. prescribe under Medicare Part D?
In 2024, Phillip Ahn, M.D. had 1,242 Medicare Part D claims for 122 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Phillip Ahn, M.D.'s MIPS final score?
The 2023 MIPS final score is 97.7 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.