DR. MAAZ SYED MOHIUDDIN M.D.
NPI 1720251697
Allergy & Immunology in Crest Hill, IL

Q: What is Maaz Mohiuddin's NPI number?

The NPI number for Maaz Mohiuddin is 1720251697. It was assigned to this individual provider in the NPPES registry on April 10, 2008.

Q: What is Maaz Mohiuddin's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for Maaz Mohiuddin was last updated on August 5, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since April 10, 2008PECOS EnrolledAccepts Medicare Assignment

2228 WEBER RD, CREST HILL, IL 60403(815) 729-9900 Get Directions Write a Review

NPPES record last updated: August 5, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 5, 2022, Dec 26, 2017 (2 updates tracked since 2017).

On this page

About Dr. Maaz Syed Mohiuddin M.d. NPPES

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

DR. MAAZ SYED MOHIUDDIN M.D. (NPI 1720251697) is an individual allergy & immunology provider in Crest Hill, Illinois, licensed in Illinois (336094071) and active in the NPI registry since April 2008. He is enrolled in Medicare PECOS, is affiliated with Adventist Hinsdale Hospital, and is a graduate of Other (2008).

NPPES Registry Identity

NPI1720251697

Entity TypeIndividualMale

Primary Taxonomy207K00000X

Provider Legal NameDR. MAAZ SYED MOHIUDDINCredential: M.D.

Location Address2228 WEBER RDCrest Hill, IL 60403

Mailing Address2228 Weber RdCrest Hill, IL 60403-0928 · (815) 729-9900

Phone(815) 729-9900

Sole ProprietorNo

Medical School CMSOtherGraduated 2008

Enumeration DateApril 10, 2008

Last NPPES UpdateAugust 5, 20222 updates tracked since enumeration

NPPES CertifiedAugust 5, 2022

✔ NPI 1720251697 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in IL · 336094071

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

Also ListedPediatricsTaxonomy 208000000X · License 50071 (CO)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

2228 WEBER RD, Crest Hill, IL 60403

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Other Identifiers 1

Medicaid71780521CO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health.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

Dr. Maaz Syed Mohiuddin 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 ID1052577327

PECOS Enrollment IDI20140404001906

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 Reassignments

Medicare enrollment records show Maaz Mohiuddin reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Allergy & Asthma Center, Inc

Same address

Allergy & Immunology

2228 WEBER RD
Crest Hill, IL 60403

Reassigned Medicare billing, Illinois enrollment
3 clinicians in this Medicare group

NPI 1730228610 (630) 240-6221

Insight Chicago, Inc.

32 mi

Internal Medicine

2525 S MICHIGAN AVE
Chicago, IL 60616

Reassigned Medicare billing, Illinois enrollment
354 clinicians in this Medicare group

NPI 1881261006 (312) 567-2000

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 16

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.

Test for allergy using allergenic extract 95004

An allergy test with allergenic extract is a diagnostic method to identify substances causing allergic reactions. Small amounts of common allergens are introduced to your body, usually through skin pricks or blood tests. Your body's response helps determine your allergies.

3,265 services62 patients

Professional service for preparation and provision of 1 or more antigens 95165

This service involves the creation and supply of antigens, substances that stimulate your immune system to fight diseases. These antigens can be used in vaccines or allergy tests to help your body build defenses against specific health threats.

1,920 services73 patients

Professional service for multiple injections of allergen 95117

The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.

752 services80 patients

Test for allergy using allergenic extract injected into skin 95024

An allergy skin test involves injecting a small amount of allergenic extract into your skin. This test helps determine if you're allergic to specific substances. If allergic, a small red bump appears at the test site. It's safe and quick.

383 services42 patients

Professional service for single injection of allergen 95115

A single allergen injection is a procedure where a small amount of a specific allergen is injected into your body. This is done to test your body's reaction to the allergen or to help your immune system become less sensitive to it, reducing allergic symptoms.

246 services29 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

201 services22 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

186 services126 patients

Principal care management services for a single high-risk disease, first 30 minutes of clinical staff time directed by health care professional, per calendar month 99426

Principal care management services focus on managing a single high-risk disease. This involves a health care professional directing clinical staff for the first 30 minutes each month. The aim is to monitor your health, coordinate care, and provide necessary support for your disease management.

113 services13 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

112 services82 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

87 services87 patients

Test to measure expiratory airflow and volume 94010

This test, known as spirometry, assesses how well your lungs work. It measures how much air you can inhale, how much you can exhale and how quickly you can exhale. It's non-invasive and helps diagnose conditions like asthma or COPD.

52 services39 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

24 services24 patients

Test to measure expiratory airflow and volume changes before and after medication administration 94060

This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.

20 services19 patients

Test to determine lung volumes using sensors 94726

This test, called spirometry, measures lung capacity using sensors. You breathe into a mouthpiece attached to a device that records the amount and rate of air you inhale and exhale. It helps diagnose and monitor lung conditions.

18 services17 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

18 services18 patients

Test to examine how well the lungs exchange gases 94729

This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.

17 services16 patients

Hospital Affiliations CMS Care Compare

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

Adventist Hinsdale Hospital

Acute Care Hospitals · Hinsdale, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140122

Location120 North Oak StHinsdale, IL 60521 · Du Page County

Emergency services Birthing friendly

Other Providers at the Same Location NPPES 3

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

MS. ADRIANA FLORES PA-C

Physician Assistant

2228 WEBER RD
CREST HILL, IL 60403

Will County (815) 729-9900

DR. MIGUEL CAMARA M.D.

Allergy & Immunology (Allergy)

2228 WEBER RD
CREST HILL, IL 60403

Will County (815) 729-9900

ALLERGY & ASTHMA CENTER, INC

Allergy & Immunology

2228 WEBER RD
CREST HILL, IL 60403

Will County (630) 240-6221

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 Maaz Mohiuddin's NPI number?

The NPI number for Maaz Mohiuddin is 1720251697. It was assigned to this individual provider in the NPPES registry on April 10, 2008.

Where is Maaz Mohiuddin located?

Maaz Mohiuddin practices at 2228 Weber Rd, Crest Hill, IL 60403. The listed phone number is (815) 729-9900.

What is Maaz Mohiuddin's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Maaz Mohiuddin enrolled in Medicare?

Yes. Maaz Mohiuddin 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 organizations bill Medicare for Maaz Mohiuddin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Maaz Mohiuddin reassigns Medicare benefits to 2 organizations: Allergy & Asthma Center, Inc (Crest Hill, IL) and Insight Chicago, Inc. (Chicago, IL). Each 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 Maaz Mohiuddin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Maaz Mohiuddin accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Maaz Mohiuddin 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 Maaz Mohiuddin affiliated with any hospitals?

According to CMS data, Maaz Mohiuddin is affiliated with Adventist Hinsdale Hospital.

When was this NPI record last updated?

The NPPES record for Maaz Mohiuddin was last updated on August 5, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.