John Tharnstrom , PA
Emergency Medicine • Naperville, IL
808 Rickert Dr Ste 103
Naperville, IL 605400908
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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John Tharnstrom is listed in NPPES under Emergency Medicine.
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NPI assigned on October 12, 2006; this date does not establish years in practice.
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Published CMS data list 345 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.
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Published Part B service records, 2024:
- 99213 — Established patient outpatient office visit: 112 service units.
- 99214 — Established patient outpatient office visit: 46 service units.
- 99203 — New patient outpatient office visit: 42 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.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 11 records in the table · Guide: How to read Medicare Part B data
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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.
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Published Part D records, 2024:
- Methylprednisolone — 38 prescription fills, including refills.
- Albuterol Sulfate Hfa (Albuterol Sulfate) — 23 prescription fills, including refills.
- Amoxicillin — 22 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 8 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 80% of clinicians listed under Emergency Medicine in Naperville, IL (2024, 53 clinicians with data). Median for this group: 608. Middle half: 405 to 796.
Close to the middle for Medicare Part B services among clinicians listed under Emergency Medicine in Illinois (2024, 2,100 clinicians with data). Median for this group: 321. Middle half: 179 to 524.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 193 in 2020 to 345 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
808 Rickert Dr Ste 103
Naperville, IL 605400908
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Emergency Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
231 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 $26,025 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 $19,294 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
151 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
$1,106 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
NPI first issued
2006
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
John Tharnstrom 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 John Tharnstrom 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 Naperville and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 80% of clinicians listed under Emergency Medicine in Naperville, IL (2024, 53 clinicians with data). Median for this group: 608. Middle half: 405 to 796.
Close to the middle for clinicians listed under Emergency Medicine in Illinois (2024, 2,100 clinicians with data). Median for this group: 321. Middle half: 179 to 524.
Medicare-allowed amount
A lower Medicare-allowed amount than 85% of clinicians listed under Emergency Medicine in Naperville, IL (2024, 53 clinicians with data). Median for this group: $70,805. Middle half: $40,995 to $88,244.
A lower Medicare-allowed amount than 70% of clinicians listed under Emergency Medicine in Illinois (2024, 2,100 clinicians with data). Median for this group: $45,108. Middle half: $24,677 to $72,172.
Paid by Medicare
A lower Medicare payment amount than 85% of clinicians listed under Emergency Medicine in Naperville, IL (2024, 53 clinicians with data). Median for this group: $53,354. Middle half: $31,459 to $67,480.
A lower Medicare payment amount than 70% of clinicians listed under Emergency Medicine in Illinois (2024, 2,100 clinicians with data). Median for this group: $34,329. Middle half: $18,565 to $55,341.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Emergency Medicine in Naperville, IL (2024, 50 clinicians with data). Median for this group: 147. Middle half: 89 to 204.
More Part D prescriptions than 70% of clinicians listed under Emergency Medicine in Illinois (2024, 1,650 clinicians with data). Median for this group: 80. Middle half: 32 to 154.
Part D drug cost
A higher Part D drug cost than 75% of clinicians listed under Emergency Medicine in Naperville, IL (2024, 50 clinicians with data). Median for this group: $755. Middle half: $387 to $1,097.
A higher Part D drug cost than 75% of clinicians listed under Emergency Medicine in Illinois (2024, 1,650 clinicians with data). Median for this group: $440. Middle half: $171 to $1,010.
59 active clinicians are listed under Emergency Medicine with a practice address in Naperville, IL (3,297 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Naperville
0% of these 59 clinicians have the CMS telehealth indicator.
69.5% of these 59 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.
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Medicare Part B services
Medicare Part B services increased 79% from 193 in 2020 to 345 in 2024.
- 2020: 193
- 2021: 468
- 2022: 520
- 2023: 600
- 2024: 345
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Medicare-allowed amount
Medicare-allowed amount increased 194% from $8,850 in 2020 to $26,025 in 2024.
- 2020: $8,850
- 2021: $27,481
- 2022: $33,022
- 2023: $48,612
- 2024: $26,025
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Paid by Medicare
Paid by Medicare increased 203% from $6,360 in 2020 to $19,294 in 2024.
- 2020: $6,360
- 2021: $20,075
- 2022: $23,477
- 2023: $37,171
- 2024: $19,294
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 26% from 204 in 2020 to 150 in 2024.
- 2020: 204
- 2021: 551
- 2022: 288
- 2023: 358
- 2024: 150
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30-day fills
30-day fills decreased 33% from 225 in 2020 to 151 in 2024.
- 2020: 225
- 2021: 904
- 2022: 362
- 2023: 360
- 2024: 151
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Part D drug cost
Part D drug cost decreased 72% from $3,896 in 2020 to $1,106 in 2024.
- 2020: $3,896
- 2021: $35,187
- 2022: $4,136
- 2023: $4,283
- 2024: $1,106
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
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 |
|---|---|---|---|---|
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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112 | 109 | $157.00 | $78.97 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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46 | 46 | $229.00 | $111.97 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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42 | 42 | $235.00 | $98.10 |
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0241U
Respiratory infectious agent detection by rna for severe acute respiratory syndrome coronavirus 2 (covid 19), influenza a, influenza b, and respiratory syncytial virus, upper respiratory specimen, each reported as detected or not detected
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31 | 31 | $267.00 | $139.78 |
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81003
Automated urinalysis test
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25 | 24 | $12.00 | $2.20 |
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36415
Insertion of needle into vein for collection of blood sample
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17 | 16 | $20.00 | $8.65 |
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80053
Blood test, comprehensive group of blood chemicals
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17 | 17 | $55.00 | $10.35 |
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85025
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
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16 | 16 | $40.00 | $7.61 |
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87651
Detection test by nucleic acid for strep (streptococcus, group a), amplified probe technique
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14 | 14 | $180.00 | $34.39 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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14 | 14 | $359.00 | $146.39 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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11 | 11 | $94.00 | $49.65 |
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 |
|---|---|---|---|---|---|
| Methylprednisolone | Methylprednisolone | 38 | 228 | $155.44 | 38 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 23 | 640 | $468.36 | 23 |
| Amoxicillin | Amoxicillin | 22 | 214 | $101.46 | 22 |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 18 | 126 | $211.43 | 18 |
| Azithromycin | Azithromycin | 13 | 65 | $44.47 | 13 |
| Prednisone | Prednisone | 12 | 66 | $21.07 | 12 |
| Hydrocortisone | Hydrocortisone | 12 | 187 | $40.25 | 12 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 12 | 106 | $63.34 | 11 |
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
Self-certified to NPPES: 2023-07-28NUCC Taxonomy Code: 207P00000X
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
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
I20151026000109
TX
2668461260
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner
Advanced Registered Nurse Practitioner
Nurse Practitioner - Family
Advanced Practice Registered Nurse
Emergency Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at PO BOX 713260, CHICAGO, IL 606771260 (Tel: 6309469200)
Registered at 808 RICKERT DR STE 103, NAPERVILLE, IL 605400908 (Tel: 3315515854)
Registered at 1860 PAYSPHERE CIR, CHICAGO, IL 606740018 (Tel: 6309469200)
NPI status registered as active in NPPES database
Registered at 2401 S 31ST ST, TEMPLE, TX 765080001 (Tel: 2547242111)
Registered at PO BOX 844658, DALLAS, TX 752844658 (Tel: 2547248800)
Recorded as JOHN THARNSTROM, PA
Emergency Medicine (license number reported to NPPES: IL 085-002044)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Emergency Medicine Providers in Naperville
- Dr. Sara Jane Hendren, MD
- Dr. Renee Peksa-Sink, DO
- Dr. Sarah Whyte, DO
- Dr. Kevin Collins, MD
- Dr. Rajeev Kalsi, MD
- Dr. Nicholas Bertucci, DO
Mailing Address
Po Box 713260
Chicago, IL 606771260
Phone: 6309469200