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MR. PHILLIP AHN M.D.
NPI 1376527879
Family Medicine in Chicago, IL

Active since November 30, 2005PECOS EnrolledAccepts Medicare Assignment
97.71/100
CMS Quality Rating
4321 S PULASKI RD, CHICAGO, IL 60632(773) 585-2410(773) 284-0913 Get Directions Write a Review

NPPES record last updated: March 29, 2016. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Mr. Phillip Ahn M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. PHILLIP AHN M.D. (NPI 1376527879) is an individual family medicine provider in Chicago, Illinois, licensed in Illinois (036089338) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with The University Of Chicago Medical Center, and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (1992).

NPPES Registry Identity

NPI1376527879
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameMR. PHILLIP AHNCredential: M.D.
Location Address4321 S PULASKI RDChicago, IL 60632-4008
Mailing Address2525 S Michigan Ave, B-390Chicago, IL 60616-2333 · (312) 567-6691 · Fax (312) 328-7895
Phone(773) 585-2410
Fax(773) 284-0913
Sole ProprietorYes
Medical School CMSUniversity Of Illinois College Of Med (chi/peor/rock/chm-urb)Graduated 1992
Enumeration DateNovember 30, 2005
Last NPPES UpdateMarch 29, 2016
✔ NPI 1376527879 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in IL · 036089338
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
4321 S PULASKI RD, Chicago, IL 60632
Open in Google Maps ↗

Other Identifiers 4

Other01621679IL · Bcbs Of Il
Medicare UPING 26098IL
Other205737IL · Medicare Ptan
Medicaid036089338 / 02IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. Phillip Ahn M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5193857985
PECOS Enrollment IDI20100714000278
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Phillip Ahn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The University Of Chicago Medical Center
6.4 mi
General Acute Care Hospital
5841 S MARYLAND AVE
Chicago, IL 60637
  • Reassigned Medicare billing, Illinois enrollment
  • 1,905 clinicians in this Medicare group
NPI 1033218128 (773) 702-1530
University Of Chicago
6.4 mi
Multi-Specialty
5841 S MARYLAND AVE, UCPG/MC 1099
Chicago, IL 60637
  • Reassigned Medicare billing, Illinois enrollment
  • 2,237 clinicians in this Medicare group
NPI 1821048786 (773) 702-9200

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
135 services53 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
73 services38 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
23 services23 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
18 services18 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
15 services15 patients
Advance care planning, first 30 minutes 99497
Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.
13 services13 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

The University Of Chicago Medical Center

Acute Care Hospitals · Chicago, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140088
Location5841 South MarylandChicago, IL 60637 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60632 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

97.71/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality75.43
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. RITA MELGAREJO-GLAAB MD
Family Medicine
4321 S PULASKI RD
CHICAGO, IL 60632
Cook County (312) 567-7600

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Phillip Ahn's NPI number?

The NPI number for Phillip Ahn is 1376527879. It was assigned to this individual provider in the NPPES registry on November 30, 2005.

Where is Phillip Ahn located?

Phillip Ahn practices at 4321 S Pulaski Rd, Chicago, IL 60632. The listed phone number is (773) 585-2410.

What is Phillip Ahn's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Phillip Ahn enrolled in Medicare?

Yes. Phillip Ahn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Phillip Ahn's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Phillip Ahn reassigns Medicare benefits to 2 organizations: The University Of Chicago Medical Center (Chicago, IL) and University Of Chicago (Chicago, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Phillip Ahn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Phillip Ahn accept?

Health plans from Oscar Health list Phillip Ahn as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Phillip Ahn affiliated with any hospitals?

According to CMS data, Phillip Ahn is affiliated with The University Of Chicago Medical Center.

When was this NPI record last updated?

The NPPES record for Phillip Ahn was last updated on March 29, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.