NPPES file of Aug 9, 2026

Allison Harris, PA-C

Physician Assistant · O Fallon, IL

Allison Harris, PA-C is a physician assistant with a practice address in O Fallon, Illinois, and NPI 1790588739, issued on Mar 27, 2025. Check the license (Illinois 085011221, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1790588739
Name
Allison Harris
Credential
PA-C
Primary taxonomy
Physician Assistant 363A00000X
License number
085011221 IL
Self-reported in NPPES; status is on the state search
Practice location
3 Saint Elizabeth Blvd Ste 5000, O Fallon, IL 62269
Phone
(618) 641-5803
Enumerated
Mar 27, 2025
Record last updated
Jun 3, 2025
Medicare enrollment
Enrolled (PECOS I20250415002552); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest physician assistant records → All 4,926 in Illinois → Look up another NPI →

Also registered at 3 Saint Elizabeth Blvd Ste 5000

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Roula Al-Dahhak, M.D.Neurology Physician1033116165
  2. Bassim Assioun, M.D.Nephrology Physician1669785408
  3. Zachary Berg, M.D.Pulmonary Disease Physician1255741278
  4. Angela Croessman-Marshall, AGNP-CAdult Health Nurse Practitioner1023994274
  5. Randall Dooley, MDUrology Physician1619940640
  6. Kostantinos Psihramis, M.D.Urology Physician1902889793

Verify Allison Harris in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 085011221    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Hshs Medical Group IncOfallon, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Allison Harris among 4,926 physician assistant records in Illinois

Allison Harris, PA-C is one of 4,926 physician assistant records with a practice address in Illinois. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 90% of them.

  • NPI issued2025 · 90% of these records are older, 3% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated2025 · median 2019 among the 3,407 with a school on file
  • Record last updated2025 · 35% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

27 physician assistant records list a practice address in O Fallon

They are 27 of the 1,077 NPPES records with a practice address in O Fallon, and 4,926 physician assistant records in Illinois.

All 4,926 in Illinois → Every provider in O Fallon → Physician Assistant nationwide →

The 8 physician assistant records with the nearest ZIP codes

  1. Stephanie Armstrong, PA-CO Fallon, IL 622691962700757
  2. Karen Blackwell, P.A.O Fallon, IL 622691487983664
  3. Lucy Broaddus, MMS, PA-C, ATC.O Fallon, IL 622691114299419
  4. Corey Brooks, PAShiloh, IL 622691134466485
  5. Candace Charles, PAO Fallon, IL 622691922284504
  6. Tina Cloin, PA-CO Fallon, IL 622691902916851
  7. Robert Dizes, PA-CShiloh, IL 622691871686790
  8. Neve Fielding, PA-CO Fallon, IL 622691922480722

Common questions

What is Allison Harris, PA-C's NPI number?

Allison Harris, PA-C's National Provider Identifier (NPI) is 1790588739, issued on Mar 27, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Allison Harris, PA-C located?

The NPPES record lists a practice address at 3 Saint Elizabeth Blvd Ste 5000, O Fallon, IL, 62269. Phone: (618) 641-5803. Providers update this record themselves, so call before visiting.

How can I verify Allison Harris, PA-C's license?

NPPES lists Illinois license number 085011221, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.