Individual provider

Maryah Mansoor, MD

Rheumatology Physician Internal Medicine Physician Student in an Organized Health Care Education/Training Program Medicare enrolled

Maryah Mansoor, MD is a Rheumatology Physician in Peoria, IL, registered under NPI 1659684777. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.

Getting there

The practice address on file is 1800 N KNOXVILLE AVE STE E, Peoria, IL 61603. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.

1800 N KNOXVILLE AVE STE E, Peoria, IL 61603 Open in Google Maps →

Credentials and Medicare

State licence
LicenceStateSpecialty
036172307 IL Rheumatology Physician primary
MD482769 PA Internal Medicine Physician
C1-0011382 DE Rheumatology Physician
75524 MN Rheumatology Physician

Licences are recorded in 4 states: IL, PA, DE, MN. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.

Medicare (PECOS)
Status
Approved
Provider type
Practitioner - Rheumatology
PAC ID
4981827656

Enrolled in Medicare 4 times, across 4 states:

StateEnrollment IDProvider type
Delaware I20151022002518 Practitioner - Rheumatology
Minnesota I20231211001828 Practitioner - Rheumatology
Iowa I20240806002314 Practitioner - Rheumatology
Illinois I20241028000562 Practitioner - Rheumatology

Medicare enrolment is recorded as approved under the provider type Practitioner - Rheumatology. There are 4 separate enrolment records across 4 states (DE, MN, IA, IL). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.

Licensed in 4 states

This provider holds licences in 4 states: Delaware, Illinois, Minnesota and Pennsylvania. The practice address on file is in Peoria, IL, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.

DE Delaware
Licence
C1-0011382
Specialty
Rheumatology Physician
Verify with the DE board →
IL Illinois practice address
Licence
036172307
Specialty
Rheumatology Physician
Verify with the IL board →
MN Minnesota
Licence
75524
Specialty
Rheumatology Physician
Verify with the MN board →
PA Pennsylvania
Licence
MD482769
Specialty
Internal Medicine Physician
Verify with the PA board →

Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.

What Rheumatology covers

An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and "collagen" diseases. NUCC Health Care Provider Taxonomy, code 207RR0500X
Allopathic & Osteopathic Physicians Internal Medicine Rheumatology

All registered taxonomy codes

This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.

CodeSpecialtyLicenceState
207RR0500X Rheumatology Physician Rheumatology 036172307 IL primary
207R00000X Internal Medicine Physician MD482769 PA
390200000X Student in an Organized Health Care Education/Training Program
207RR0500X Rheumatology Physician Rheumatology C1-0011382 DE
207RR0500X Rheumatology Physician Rheumatology 75524 MN

The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.

Full NPPES record

An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.

NPI1659684777 valid check digit
Entity typeIndividual (NPI-1)
Enumeration dateJul 18, 2010
Last updatedApr 10, 2026
StatusActive
Sole proprietorNo
CredentialMD
Practice address 1800 N KNOXVILLE AVE STE E
Peoria, IL 61603
(309) 308-0910
Fax (309) 308-0919
Other identifiers 75524 · Other (MN)
This record was updated on Apr 10, 2026, which is recent enough that the contact details are likely still accurate.

Number check

1659684777 passes the NPI check digit test The final digit 7 matches the value computed from the first nine digits, so this is a well-formed NPI.
How the check works, step by step

Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.

Digit 8 0 8 4 0 1 6 5 9 6 8 4 7 7
Doubled? ×2 ×2 ×2 ×2 ×2 ×2 ×2
Value 8 0 8 8 0 2 6 1 9 3 8 8 7 5

Sum = 73 · next multiple of 10 = 80 · check digit = 7 · actual last digit = 7

A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.

Common questions

What is NPI number 1659684777?
NPI 1659684777 is the National Provider Identifier assigned to Maryah Mansoor, MD in Peoria, IL. It is a 10-digit number issued by the Centers for Medicare & Medicaid Services and used on claims, referrals, and prescriptions to identify the provider.
What does Rheumatology cover?
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and "collagen" diseases.
How do I contact Maryah Mansoor, MD?
The phone number on file with NPPES is (309) 308-0910, last updated Apr 10, 2026. Because NPPES is only updated when a provider files a change, call ahead to confirm the number and the current practice address before visiting.
Does Maryah Mansoor, MD accept Medicare?
This NPI has an approved Medicare enrolment in PECOS, which means the provider is enrolled to bill Medicare. Enrolment does not guarantee they are accepting new Medicare patients — verify directly with the office.
Is NPI 1659684777 a valid number?
Yes. 1659684777 passes the Luhn check digit validation that CMS uses for NPI numbers, and it resolves to an active record in the registry.
How to use this page. Everything here comes from public federal records. Tips Health does not verify quality of care, confirm that a licence is currently active, or check malpractice history, and accepts no fees for placement. A listing is not a recommendation. Verify independently before seeking care.