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ALEXANDRA L LARSON M.D.
NPI 1992090468
Pathology - Anatomic Pathology & Clinical Pathology in Chicago, IL

Active since June 13, 2011PECOS EnrolledAccepts Medicare Assignment
303 E CHICAGO AVE, W127 WARD 3-140 NORTHWESTERN UNIVERSITY, CHICAGO, IL 60611(312) 503-8144 Get Directions Write a Review

NPPES record last updated: February 27, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Alexandra L Larson M.d. NPPES

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

ALEXANDRA L LARSON M.D. (NPI 1992090468) is an individual anatomic pathology & clinical pathology provider in Chicago, Illinois, licensed in Illinois (125059458) and active in the NPI registry since June 2011. She is enrolled in Medicare PECOS, is affiliated with Genesis Hlth System Dba Genesis Mdl Ctr-illini, and maintains a secondary practice location in Chicago.

NPPES Registry Identity

NPI1992090468
Entity TypeIndividualFemale
Primary Taxonomy207ZP0102X
Provider Legal NameALEXANDRA L LARSONCredential: M.D.
Location Address303 E CHICAGO AVE, W127 WARD 3-140 NORTHWESTERN UNIVERSITYChicago, IL 60611-3072
Mailing Address1320 N Shawano DrMarshfield, WI 54449-1346 · (815) 997-6753
Phone(312) 503-8144
Sole ProprietorNo
Medical School CMSOtherGraduated 2011
Enumeration DateJune 13, 2011
Last NPPES UpdateFebruary 27, 2018
✔ NPI 1992090468 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in IL · 125059458
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
303 E CHICAGO AVE, Chicago, IL 60611
Open in Google Maps ↗

Secondary Practice Location 1

Location 1303 E Chicago Ave, W127 Ward 3-140 Northwestern UniversityChicago, IL 60611-3072 · Phone (312) 503-8144

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company, Wellmark Health Plan of Iowa, Inc..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

Alexandra L Larson 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 ID8022300870
PECOS Enrollment IDI20180731004183, I20191206001864
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 Reassignment

Medicare enrollment records show Alexandra Larson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Peoria Tazewell Pathology Group, S.C.
132 mi
Anatomic Pathology & Clinical Pathology
221 NE GLEN OAK AVE
Peoria, IL 61603
  • Reassigned Medicare billing, Iowa and Illinois enrollments
  • 17 clinicians in this Medicare group
NPI 1578597738 (309) 672-4911

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 9

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.

Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
383 services233 patients
Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
144 services29 patients
Special stained specimen slides to examine tissue, initial procedure 88342
This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.
61 services52 patients
Microscopic genetic analysis of tumor, manual 88360
Microscopic genetic analysis of a tumor involves examining your tumor's genes under a microscope. This helps identify specific genetic changes in the tumor cells. This information can aid in diagnosing, predicting disease progression, and determining the most effective treatment options.
47 services15 patients
Evaluation of fine needle aspirate with interpretation and report 88173
This procedure involves using a thin needle to collect a small sample from an abnormal area or lump. The sample is then examined under a microscope to identify any potential issues. A report of the findings is provided for further analysis.
35 services19 patients
Cell examination of body fluid, smears 88104
Cell examination of body fluid, or smear, is a laboratory test where a sample of your body fluid is taken. It's then thinly spread on a glass slide and examined under a microscope to check for abnormalities. This can help diagnose various health conditions.
31 services24 patients

Hospital Affiliations CMS Care Compare 5

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

Genesis Hlth System Dba Genesis Mdl Ctr-Illini

Acute Care Hospitals · Silvis, IL
2/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number140275
Location801 Illini DrSilvis, IL 61282 · Rock Island County
Emergency services Birthing friendly

Trinity Rock Island

Acute Care Hospitals · Rock Island, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140280
Location2701 17th StRock Island, IL 61201 · Rock Island County
Emergency services Birthing friendly

Trinity Muscatine

Acute Care Hospitals · Muscatine, IA
OwnershipVoluntary non-profit - Private
CMS Certification Number160013
Location1518 Mulberry AvenueMuscatine, IA 52761 · Muscatine County
Emergency services

Genesis Medical Center-Davenport

Acute Care Hospitals · Davenport, IA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number160033
Location1227 East Rusholme StreetDavenport, IA 52803 · Scott County
Emergency services Birthing friendly

Trinity - Bettendorf

Acute Care Hospitals · Bettendorf, IA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number160104
Location4500 Utica Ridge RoadBettendorf, IA 52722 · Scott County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60611 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
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
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.

Other Providers at the Same Location NPPES 20

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

DR. BRIAN DANIEL BOLTON M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
303 E CHICAGO AVE, WARD6-204
CHICAGO, IL 60611
Cook County (312) 503-8144
DR. JAIME GRUTZENDLER MD
Psychiatry & Neurology (Neurology)
303 E CHICAGO AVE, WARD # 10-132
CHICAGO, IL 60611
Cook County (312) 503-5298
ANNE SORINE HENKEL MD
Internal Medicine
303 E CHICAGO AVE, 10-440 SEARLE
CHICAGO, IL 60611
Cook County (312) 503-4667
DR. MARC W SLUTZKY MD
Psychiatry & Neurology (Neurology)
303 E CHICAGO AVE, WARD 10-185
CHICAGO, IL 60611
Cook County (312) 695-7950
DR. HANNAH ALPHS M.D.
Urology
303 E CHICAGO AVE, TARRY 16-703
CHICAGO, IL 60611
Cook County (312) 908-8145
NORTHWESTERN UNIVERSITY
Clinical Medical Laboratory
303 E CHICAGO AVE, TARRY BUILDING, 11-703
CHICAGO, IL 60611
Cook County (312) 503-0830
WILLIAM KARPUS
Specialist/Technologist, Pathology
303 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 503-1004
BEVAN TANDON M.D.
Clinical Medical Laboratory
303 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 503-8223

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 Alexandra Larson's NPI number?

The NPI number for Alexandra Larson is 1992090468. It was assigned to this individual provider in the NPPES registry on June 13, 2011.

Where is Alexandra Larson located?

Alexandra Larson practices at 303 E Chicago Ave W127 Ward 3-140 Northwestern University, Chicago, IL 60611. The listed phone number is (312) 503-8144.

What is Alexandra Larson's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Alexandra Larson enrolled in Medicare?

Yes. Alexandra Larson 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 organization bills Medicare for Alexandra Larson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Larson reassigns Medicare benefits to Peoria Tazewell Pathology Group, S.C. (Peoria, IL). The 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 Alexandra Larson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Alexandra Larson accept?

Health plans from Oscar Insurance Company and Wellmark Health Plan of Iowa, Inc. list Alexandra Larson 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 Alexandra Larson affiliated with any hospitals?

According to CMS data, Alexandra Larson is affiliated with Genesis Hlth System Dba Genesis Mdl Ctr-Illini, Trinity Rock Island, Trinity Muscatine, Genesis Medical Center-Davenport and Trinity - Bettendorf.

When was this NPI record last updated?

The NPPES record for Alexandra Larson was last updated on February 27, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.