Katherine Marie Larsen, NP-C
Nurse Practitioner · Chicago, IL
Katherine Marie Larsen, NP-C is a nurse practitioner with a practice address in Chicago, Illinois, and NPI 1760970073, issued on Apr 23, 2018. Check the license (Illinois 209017504, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine Marie Larsen
- Credential
- NP-C
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 209017504 IL
Self-reported in NPPES; status is on the state search - Practice location
- 259 E Erie St FL 17, Chicago, IL 60611
- Phone
- (312) 926-6000
- Enumerated
- Apr 23, 2018
- Record last updated
- May 18, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (312) 926-6433
- Medicare enrollment
- Enrolled (PECOS I20181105000515); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 4,892 in Illinois → Look up another NPI →
Also registered at 259 E Erie St FL 17
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine Marie Larsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 209017504Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average nurse practitioner in 2024
257 Medicare Part D claims for 208 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin35 claims
- Amoxicillin-Clavulanate Potass27 claims
- Methylprednisolone21 claims
- Doxycycline Hyclate17 claims
- Nitrofurantoin Mono-Macro17 claims
- Prednisone17 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): 94.1 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).
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationOak Brook, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Marie Larsen among 4,892 nurse practitioner records in Illinois
Katherine Marie Larsen, NP-C is one of 4,892 nurse practitioner records with a practice address in Illinois. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 47% of them.
- NPI issued2018 · 47% of these records are older, 46% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2017 · median 2018 among the 3,389 with a school on file
- Record last updated2021 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
952 nurse practitioner records list a practice address in Chicago
They are 952 of the 63,379 NPPES records with a practice address in Chicago, and 4,892 nurse practitioner records in Illinois.
All 4,892 in Illinois → Every provider in Chicago → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
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- Florence Denby, RN, CNP, APNChicago, IL 606111598773103
- Rebecca DukeChicago, IL 606111932204286
- Sylvia Duraski, CNP, APNChicago, IL 606111417965039
- Barbara Guido, APN-CNPChicago, IL 606111780784611
- Susanna Miranda, DNP, APRN, AGNP-CChicago, IL 606111831118512
Common questions
What is Katherine Marie Larsen, NP-C's NPI number?
Katherine Marie Larsen, NP-C's National Provider Identifier (NPI) is 1760970073, issued on Apr 23, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Marie Larsen, NP-C located?
The NPPES record lists a practice address at 259 E Erie St FL 17, Chicago, IL, 60611. Phone: (312) 926-6000. Providers update this record themselves, so call before visiting.
How can I verify Katherine Marie Larsen, NP-C's license?
NPPES lists Illinois license number 209017504, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Katherine Marie Larsen, NP-C prescribe under Medicare Part D?
In 2024, Katherine Marie Larsen, NP-C had 257 Medicare Part D claims for 208 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
What is Katherine Marie Larsen, NP-C's MIPS final score?
The 2023 MIPS final score is 94.1 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.