Heather Marie Gannon-Stringer , PA
Physician Assistant • Chicago, IL
1725 W Harrison St, Suite 829
Chicago, IL 606123841
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
Heather Gannon-Stringer is listed in NPPES under Physician Assistant.
-
NPI assigned on April 13, 2007; this date does not establish years in practice.
-
Published CMS data list 11,296 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
-
Published Part B service records, 2024:
- J9267 — Injection, paclitaxel, 1 mg: 5,179 service units.
- J9271 — Injection, pembrolizumab, 1 mg: 3,800 service units.
- J1100 — Injection, dexamethasone sodium phosphate, 1 mg: 884 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
See all 20 records in the table · Guide: How to read Medicare Part B data
-
Published CMS data list 150 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
-
Published Part D records, 2024:
- Ondansetron Odt (Ondansetron) — 28 prescription fills, including refills.
- Letrozole — 27 prescription fills, including refills.
- Gabapentin — 24 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 7 records in the table · Guide: How to read Medicare Part D prescriber data
-
More Medicare Part B services than 95% of clinicians listed under Physician Assistant in Chicago, IL (2024, 588 clinicians with data). Median for this group: 110. Middle half: 45 to 306.
More Medicare Part B services than 95% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: 212. Middle half: 76 to 548.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
-
Medicare Part B services went from 107 in 2019 to 11,296 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2019–2024.
Practice Location & Contact Primary Location
1725 W Harrison St
Suite 829
Chicago, IL 606123841
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Affiliated Oncologists Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2006
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
217 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $287,576 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $224,704 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
189 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$278,662 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $615.93 across 28 records.
By nature of payment
- Food and Beverage: $615.93 across 28 records.
Reporting-company totals (3 largest of 14)
- AstraZeneca Pharmaceuticals LP: $136.15 across 7 records.
- Merck Sharp & Dohme LLC: $104.31 across 4 records.
- ABBVIE INC.: $76.85 across 4 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
20 years (graduated 2006)
CMS Doctors and Clinicians data list 2006 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2007
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Heather Gannon-Stringer has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Heather Gannon-Stringer as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Chicago and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 95% of clinicians listed under Physician Assistant in Chicago, IL (2024, 588 clinicians with data). Median for this group: 110. Middle half: 45 to 306.
More Medicare Part B services than 95% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: 212. Middle half: 76 to 548.
Medicare-allowed amount
A higher Medicare-allowed amount than 95% of clinicians listed under Physician Assistant in Chicago, IL (2024, 588 clinicians with data). Median for this group: $9,495. Middle half: $3,730 to $23,698.
A higher Medicare-allowed amount than 95% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: $16,580. Middle half: $6,650 to $35,717.
Paid by Medicare
A higher Medicare payment amount than 95% of clinicians listed under Physician Assistant in Chicago, IL (2024, 588 clinicians with data). Median for this group: $7,176. Middle half: $2,794 to $17,605.
A higher Medicare payment amount than 95% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: $12,415. Middle half: $4,894 to $26,472.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Physician Assistant in Chicago, IL (2024, 651 clinicians with data). Median for this group: 116. Middle half: 41 to 337.
Close to the middle for clinicians listed under Physician Assistant in Illinois (2024, 2,668 clinicians with data). Median for this group: 203. Middle half: 67 to 595.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Physician Assistant in Chicago, IL (2024, 651 clinicians with data). Median for this group: $1,977. Middle half: $320 to $34,048.
A higher Part D drug cost than 90% of clinicians listed under Physician Assistant in Illinois (2024, 2,668 clinicians with data). Median for this group: $3,018. Middle half: $535 to $48,132.
1,446 active clinicians are listed under Physician Assistant with a practice address in Chicago, IL (4,929 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Chicago
17.4% of these 1,446 clinicians have the CMS telehealth indicator.
63.6% of these 1,446 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Medicare Part B services
Medicare Part B services increased 10457% from 107 in 2019 to 11,296 in 2024.
- 2019: 107
- 2020: 11
- 2022: 13
- 2023: 1,468
- 2024: 11,296
-
Medicare-allowed amount
Medicare-allowed amount increased 2350% from $11,736 in 2019 to $287,576 in 2024.
- 2019: $11,736
- 2020: $1,015
- 2022: $1,493
- 2023: $61,008
- 2024: $287,576
-
Paid by Medicare
Paid by Medicare increased 2557% from $8,457 in 2019 to $224,704 in 2024.
- 2019: $8,457
- 2020: $734
- 2022: $912
- 2023: $44,539
- 2024: $224,704
-
Medicare Part D prescriptions
Medicare Part D prescriptions increased 90% from 79 in 2020 to 150 in 2024.
- 2020: 79
- 2021: 117
- 2022: 119
- 2023: 156
- 2024: 150
-
30-day fills
30-day fills increased 75% from 108 in 2020 to 189 in 2024.
- 2020: 108
- 2021: 173
- 2022: 168
- 2023: 208
- 2024: 189
-
Part D drug cost
Part D drug cost increased 18058% from $1,535 in 2020 to $278,662 in 2024.
- 2020: $1,535
- 2021: $2,514
- 2022: $2,622
- 2023: $4,509
- 2024: $278,662
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $176.76 in 2021 to $615.93 in 2025.
- 2021: $176.76
- 2022: $131.04
- 2023: $171.66
- 2024: $489.39
- 2025: $615.93
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): 28 records totaling $615.93.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
|
— | General | $34.62 |
| Astellas Pharma US Inc |
Food and Beverage
In-kind items and services
|
Xtandi | General | $28.21 |
| Immunocore Limited |
Food and Beverage
In-kind items and services
|
KIMMTRAK | General | $28.01 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
ELAHERE | General | $27.97 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
|
KEYTRUDA | General | $27.47 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
— | General | $26.21 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
LYNPARZA | General | $25.72 |
| Agios Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
PYRUKYND | General | $25.22 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
|
KEYTRUDA | General | $24.77 |
| Aveo Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
FOTIVDA | General | $24.23 |
| SOBI, INC |
Food and Beverage
In-kind items and services
|
Vonjo | General | $23.71 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
LIBTAYO | General | $23.63 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
LYNPARZA | General | $22.35 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
TIVDAK | General | $22.19 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
TIVDAK | General | $21.83 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
LYNPARZA | General | $21.62 |
| Gilead Sciences, Inc. |
Food and Beverage
In-kind items and services
|
Trodelvy | General | $21.15 |
| Eisai Inc. |
Food and Beverage
In-kind items and services
|
Lenvima | General | $21.06 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
TIVDAK | General | $20.99 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
CALQUENCE | General | $20.85 |
| Genentech, Inc. |
Food and Beverage
In-kind items and services
|
Venclexta | General | $19.29 |
| PUMA BIOTECHNOLOGY, INC. |
Food and Beverage
In-kind items and services
|
NERLYNX | General | $19.10 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
CALQUENCE | General | $18.80 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
ELAHERE | General | $18.63 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
|
KEYTRUDA | General | $17.45 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
J9267
Injection, paclitaxel, 1 mg
|
5,179 | 11 | $1.00 | $0.10 |
|
J9271
Injection, pembrolizumab, 1 mg
|
3,800 | 12 | $150.79 | $55.41 |
|
J1100
Injection, dexamethasone sodium phosphate, 1 mg
|
884 | 26 | $1.00 | $0.12 |
|
J9045
Injection, carboplatin, 50 mg
|
236 | 17 | $300.00 | $3.56 |
|
J2405
Injection, ondansetron hydrochloride, per 1 mg
|
200 | 12 | $3.00 | $0.10 |
|
99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
174 | 140 | $224.00 | $111.63 |
|
99459
Pelvic exam
|
160 | 129 | $49.00 | $19.15 |
|
99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
|
110 | 35 | $301.00 | $158.15 |
|
G2211
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's
|
103 | 75 | $35.00 | $14.36 |
|
96375
Injection of additional new drug or substance into vein
|
78 | 23 | $105.00 | $13.19 |
|
96413
Administration of chemotherapy into vein, 1 hour or less
|
77 | 35 | $686.00 | $111.40 |
|
96367
Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less
|
70 | 27 | $152.00 | $24.19 |
|
96415
Administration of chemotherapy into vein, each additional hour
|
43 | 14 | $156.00 | $23.91 |
|
96417
Administration of additional new drug or substance into vein, 1 hour or less
|
38 | 16 | $334.00 | $54.84 |
|
J1200
Injection, diphenhydramine hcl, up to 50 mg
|
34 | 19 | $7.00 | $0.81 |
|
96372
Injection of drug or substance under skin or into muscle
|
27 | 17 | $93.00 | $12.36 |
|
J1454
Injection, fosnetupitant 235 mg and palonosetron 0.25 mg
|
26 | 15 | $1845.00 | $681.99 |
|
J3490
Unclassified drugs
|
23 | 16 | $9.00 | $0.74 |
|
96523
Irrigation of implanted venous access drug delivery device
|
18 | 16 | $111.00 | $20.84 |
|
99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
16 | 16 | $148.00 | $79.60 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Ondansetron Odt | Ondansetron | 28 | 280 | $259.43 | 20 |
| Letrozole | Letrozole | 27 | 1,770 | $463.48 | — |
| Gabapentin | Gabapentin | 24 | 870 | $221.52 | — |
| Dexamethasone | Dexamethasone | 24 | 559 | $503.86 | 16 |
| Prochlorperazine Maleate | Prochlorperazine Maleate | 21 | 180 | $168.76 | 17 |
| Nystatin | Nystatin | 15 | 283 | $260.95 | 11 |
| Lenvima | Lenvatinib Mesylate | 11 | 330 | $276,783.94 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20070712000146
IL
0941300578
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Affiliated Oncologists Llc
4440 W 95th St, Oak Lawn, IL 604532600
Phone: 7086845475
Affiliated Oncologists Llc
10604 Southwest Hwy, Chicago Ridge, IL 604152717
Phone: 7084249710
Affiliated Oncologists Llc
82 Orland Square Dr, Orland Park, IL 604623207
Phone: 7083421900
Affiliated Oncologists Llc
3825 Highland Ave, Downers Grove, IL 605151562
Phone: 7084223242
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant
Physician Assistant (Certified)
Physician Assistant
Physician Assistant
Physician Assistant
Physician Assistant
Nurse Practitioner - Family
Advanced Practice Nurse
Career & Practice History
NPI enumerated April 13, 2007.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Physician Assistants in Chicago
- Matthew Feeley, PA
- Joseph Boutet, PA-C
- Anita See, PA-C
- Rebekka Feingold, PA-C
- Bree Dallinga, PA-C
- Alexandra Kazmer, PA-C
Mailing Address
Po Box 802
Oak Lawn, IL 604540802
Phone: 7084223242