Katherine Marie Larsen , NP-C
Nurse Practitioner โข Chicago, IL
259 E Erie St Fl 17
Chicago, IL 606112987
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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Katherine Larsen is listed in NPPES under Nurse Practitioner.
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NPI assigned on April 23, 2018; this date does not establish years in practice.
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Published CMS data list 330 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 โ Established patient outpatient office visit: 97 service units.
- 36415 โ Insertion of needle into vein for collection of blood sample: 53 service units.
- 99213 โ Established patient outpatient office visit: 52 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ 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 10 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 170 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Cephalexin โ 35 prescription fills, including refills.
- Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) โ 27 prescription fills, including refills.
- Methylprednisolone โ 21 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 9 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 75% of clinicians listed under Nurse Practitioner in Chicago, IL (2024, 377 clinicians with data). Median for this group: 153. Middle half: 60 to 327.
Close to the middle for Medicare Part B services among clinicians listed under Nurse Practitioner in Illinois (2024, 2,561 clinicians with data). Median for this group: 261. Middle half: 101 to 526.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 255 in 2020 to 330 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
259 E Erie St Fl 17
Chicago, IL 606112987
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: Northwestern Medical Faculty Foundation. 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
2017
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
255 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 โ by Provider, 2024.
Medicare-allowed amount
About $22,983 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 โ by Provider and Service, 2024.
Paid by Medicare
About $16,525 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 โ by Provider and Service, 2024.
30-day fills
170 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
$791 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 โ by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021โ2025.
Years since graduation
9 years (graduated 2017)
CMS Doctors and Clinicians data list 2017 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
2018
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, โDoes your provider accept Medicare as full payment?โ
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)
Katherine Larsen 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 Katherine Larsen 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 75% of clinicians listed under Nurse Practitioner in Chicago, IL (2024, 377 clinicians with data). Median for this group: 153. Middle half: 60 to 327.
Close to the middle for clinicians listed under Nurse Practitioner in Illinois (2024, 2,561 clinicians with data). Median for this group: 261. Middle half: 101 to 526.
Medicare-allowed amount
A higher Medicare-allowed amount than 65% of clinicians listed under Nurse Practitioner in Chicago, IL (2024, 377 clinicians with data). Median for this group: $13,286. Middle half: $5,333 to $28,905.
Close to the middle for clinicians listed under Nurse Practitioner in Illinois (2024, 2,561 clinicians with data). Median for this group: $21,010. Middle half: $8,652 to $42,014.
Paid by Medicare
A higher Medicare payment amount than 65% of clinicians listed under Nurse Practitioner in Chicago, IL (2024, 377 clinicians with data). Median for this group: $9,934. Middle half: $3,962 to $21,570.
Close to the middle for clinicians listed under Nurse Practitioner in Illinois (2024, 2,561 clinicians with data). Median for this group: $15,151. Middle half: $6,396 to $31,322.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Nurse Practitioner in Chicago, IL (2024, 364 clinicians with data). Median for this group: 134. Middle half: 47 to 424.
Close to the middle for clinicians listed under Nurse Practitioner in Illinois (2024, 2,572 clinicians with data). Median for this group: 259. Middle half: 80 to 930.
Part D drug cost
A lower Part D drug cost than 70% of clinicians listed under Nurse Practitioner in Chicago, IL (2024, 364 clinicians with data). Median for this group: $7,605. Middle half: $492 to $57,977.
A lower Part D drug cost than 75% of clinicians listed under Nurse Practitioner in Illinois (2024, 2,572 clinicians with data). Median for this group: $10,867. Middle half: $976 to $113,945.
952 active clinicians are listed under Nurse Practitioner with a practice address in Chicago, IL (4,894 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Chicago
20% of these 952 clinicians have the CMS telehealth indicator.
56.2% of these 952 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 29% from 255 in 2020 to 330 in 2024.
- 2020: 255
- 2021: 265
- 2022: 136
- 2023: 302
- 2024: 330
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Medicare-allowed amount
Medicare-allowed amount increased 47% from $15,596 in 2020 to $22,983 in 2024.
- 2020: $15,596
- 2021: $20,392
- 2022: $8,709
- 2023: $22,765
- 2024: $22,983
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Paid by Medicare
Paid by Medicare increased 54% from $10,745 in 2020 to $16,525 in 2024.
- 2020: $10,745
- 2021: $15,330
- 2022: $6,972
- 2023: $17,972
- 2024: $16,525
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 233% from 51 in 2020 to 170 in 2024.
- 2020: 51
- 2021: 49
- 2023: 148
- 2024: 170
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30-day fills
30-day fills increased 233% from 51 in 2020 to 170 in 2024.
- 2020: 51
- 2021: 49
- 2023: 148
- 2024: 170
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Part D drug cost
Part D drug cost went from $522 in 2020 to $791 in 2024.
- 2020: $522
- 2021: $316
- 2023: $1,229
- 2024: $791
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 ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2017โ2023 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 โ by Provider and Service data, 2018โ2024; 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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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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97 | 97 | $323.00 | $114.06 |
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36415
Insertion of needle into vein for collection of blood sample
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53 | 53 | $20.00 | $8.53 |
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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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52 | 51 | $219.00 | $80.89 |
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81003
Automated urinalysis test
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34 | 34 | $16.00 | $2.20 |
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87635
Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen
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26 | 26 | $165.00 | $50.28 |
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87880
Detection test by immunoassay with direct visual observation for streptococcus, group a (strep)
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15 | 15 | $86.00 | $16.20 |
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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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15 | 15 | $505.00 | $142.45 |
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87502
Detection test by nucleic acid for multiple types influenza virus
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14 | 14 | $231.00 | $93.88 |
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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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12 | 12 | $330.00 | $100.75 |
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99442
Telephone medical discussion with physician, 11-20 minutes
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12 | 12 | $175.00 | $81.31 |
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 |
|---|---|---|---|---|---|
| Cephalexin | Cephalexin | 35 | 248 | $176.35 | 35 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 27 | 204 | $172.07 | 26 |
| Methylprednisolone | Methylprednisolone | 21 | 126 | $103.14 | 21 |
| Prednisone | Prednisone | 17 | 102 | $37.30 | 17 |
| Doxycycline Hyclate | Doxycycline Hyclate | 17 | 125 | $70.75 | 16 |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 17 | 93 | $147.65 | 17 |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 14 | 84 | $47.93 | 14 |
| Azithromycin | Azithromycin | 11 | 56 | $36.01 | 11 |
| Paxlovid | Nirmatrelvir/Ritonavir | 11 | 55 | $0.00 | 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: 2021-05-18NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NURSE PRACTITIONER
I20181105000515
IL
1355694654
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
Northwestern Medical Faculty Foundation
235 S Gary Ave, Bloomingdale, IL 601082213
Phone: 6308939600
Northwestern Medical Faculty Foundation
675 N St Clair, Chicago, IL 606115975
Northwestern Medical Faculty Foundation
636 Raymond Dr, Naperville, IL 605639789
Phone: 6304162300
Northwestern Medical Faculty Foundation
2635 Church Rd, Aurora, IL 605028943
Phone: 6303156900
Northwestern Medical Faculty Foundation
233 S Gary Ave, Bloomingdale, IL 601082213
Phone: 6303584414
Northwestern Medical Faculty Foundation
675 N Saint Clair St, Chicago, IL 606115975
Northwestern Medical Faculty Foundation
1001 Commerce Dr, Oak Brook, IL 605238865
Northwestern Medical Faculty Foundation
660 N Westmoreland Rd, Lake Forest, IL 600451673
Phone: 3129266146
Northwestern Medical Faculty Foundation
7 Blanchard Cir, Wheaton, IL 601892038
Phone: 6306820500
Northwestern Medical Faculty Foundation
2900 Foxfield Rd, St Charles, IL 601745799
Phone: 6303776500
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine - Geriatric Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner
Advanced Practice Registered Nurse, Certified Nurse Practitioner
Internal Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner
Advanced Practice Nurse
Internal Medicine - Endocrinology, Diabetes & Metabolism
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 259 E ERIE ST FL 17, CHICAGO, IL 606112987 (Tel: 3129266000)
Nurse Practitioner (license number reported to NPPES: IL 209017504)
NPI status registered as active in NPPES database
Registered at 259 E ERIE ST FL 17, CHICAGO, IL 606112987 (Tel: 3129264343)
Registered at 3243 N SEMINARY AVE, CHICAGO, IL 606573310 (Tel: 3123917030)
Recorded as KATHERINE LARSEN, NP-C
Nurse Practitioner (license number reported to NPPES: IL 209.017504)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Nurse Practitioners in Chicago
- Taylor Well
- Rebecca Shah, APN-CNP
- Dr. Diana Umali, DNP
- Crista Brokamp, APRN, CNP
- Athena Crowley, APRN, CNP
- Laura Dixon, RN
Mailing Address
259 E Erie St Fl 17
Chicago, IL 606112987
Phone: 3129266000