DR. SENG M LEONG MD
NPI 1487750790
Internal Medicine in Barrington, IL

Q: What is Seng Leong's NPI number?

The NPI number for Seng Leong is 1487750790. It was assigned to this individual provider in the NPPES registry on September 15, 2006.

Q: What is Seng Leong's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Seng Leong was last updated on March 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months 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 September 15, 2006PECOS EnrolledAccepts Medicare Assignment

27750 W HIGHWAY 22, BARRINGTON, IL 60010(847) 381-5800(847) 381-5873 Get Directions Write a Review

NPPES record last updated: March 31, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 31, 2025, Dec 27, 2021 (2 updates tracked since 2021).

On this page

About Dr. Seng M Leong Md NPPES

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

DR. SENG M LEONG MD (NPI 1487750790) is an individual internal medicine provider in Barrington, Illinois, licensed in Illinois (036-055809) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Advocate Sherman Hospital, and is a graduate of Other (1969).

NPPES Registry Identity

NPI1487750790

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. SENG M LEONGCredential: MD

Location Address27750 W HIGHWAY 22Barrington, IL 60010-2379

Mailing Address29373 Network PlChicago, IL 60673-1293 · (847) 390-5900

Phone(847) 381-5800

Fax(847) 381-5873

Sole ProprietorYes

Medical School CMSOtherGraduated 1969

Enumeration DateSeptember 15, 2006

Last NPPES UpdateMarch 31, 20252 updates tracked since enumeration

NPPES CertifiedMarch 31, 2025

✔ NPI 1487750790 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in IL · 036-055809

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

27750 W HIGHWAY 22, Barrington, IL 60010

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Other Identifiers 4

OtherL96137IL · Medicare Id

Other110209671IL · Railroad Medicare

OtherCH2241IL · Rail Road Medicare Group

Medicaid03655809IL

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Seng M Leong Md 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 ID8022151083

PECOS Enrollment IDI20100130000127

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.

Areas of Expertise CMS Part B claims 17

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.

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.

1,191 services591 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

993 services550 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

359 services359 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

193 services168 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

161 services153 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.

156 services127 patients

Influenza vaccine split virus, preservative free 90662

The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.

153 services146 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

93 services87 patients

Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and G0180

This is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.

58 services46 patients

Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit G0438

An annual wellness visit is a yearly appointment with your doctor to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's an opportunity to discuss your health status and goals and get a plan tailored for you.

52 services52 patients

Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use 90677

The Pneumococcal Conjugate Vaccine (PCV20) is a shot given to protect against 20 types of bacteria that can cause serious infections like pneumonia and meningitis. It's administered through a muscle, usually in the arm. It's important for overall health.

31 services31 patients

Administration of pneumococcal vaccine G0009

The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.

30 services30 patients

Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment G0402

An Initial Preventive Physical Examination, also known as a "Welcome to Medicare" visit, is a one-time, face-to-face visit during your first 12 months of Medicare enrollment. It includes a review of your health, as well as education and counseling about preventive services and further screenings.

26 services26 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

15 services15 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.

13 services12 patients

Electrocardiogram, routine ecg with 12 leads; performed as a screening for the initial preventive physical examination with interpretation and report G0403

An Electrocardiogram (ECG) with 12 leads is a non-invasive test that measures the electrical activity of your heart. It's performed during your initial physical examination to screen for heart conditions. The results are interpreted and compiled into a report for further evaluation.

12 services12 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.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

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

Advocate Sherman Hospital

Acute Care Hospitals · Elgin, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140030

Location1425 North Randall RoadElgin, IL 60123 · Kane County

Emergency services Birthing friendly

Northwestern Medicine Mchenry

Acute Care Hospitals · Mchenry, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140116

Location4201 Medical Center DriveMchenry, IL 60050 · Mc Henry County

Emergency services Birthing friendly

Advocate Condell Medical Center

Acute Care Hospitals · Libertyville, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140202

Location801 S Milwaukee AveLibertyville, IL 60048 · Lake County

Emergency services Birthing friendly

Advocate Lutheran General Hospital

Acute Care Hospitals · Park Ridge, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140223

Location1775 Dempster StPark Ridge, IL 60068 · Cook County

Emergency services Birthing friendly

Advocate Good Shepherd Hospital

Acute Care Hospitals · Barrington, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140291

Location450 West Highway 22Barrington, IL 60010 · Lake County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60010 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

$137.43 typical visit price

range $59.81 – $181.38

Typical copayment $34.35 (range $14.95 – $45.34)

Most-billed visit code 99204

Established Patient

$105.07 typical visit price

range $19.15 – $147.12

Typical copayment $26.26 (range $4.78 – $36.78)

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.

Referred Medical Equipment & Supplies CMS DME claims 23

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

44 suppliers123 claims329 services$5.60 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

30 suppliers74 claims85 services$0.98 avg. paid by Medicare

Tubing with integrated heating element for use with positive airway pressure device A4604

DME-Other DME · category DE001N

5 suppliers18 claims18 services$30.58 avg. paid by Medicare

Administration set, with small volume nonfiltered pneumatic nebulizer, disposable A7003

DME-Other DME · category DE000N

3 suppliers13 claims25 services$1.06 avg. paid by Medicare

Filter, disposable, used with aerosol compressor or ultrasonic generator A7013

DME-Other DME · category DE000N

4 suppliers14 claims24 services$0.59 avg. paid by Medicare

Full face mask used with positive airway pressure device, each A7030

DME-Other DME · category DE001N

5 suppliers17 claims17 services$61.41 avg. paid by Medicare

Face mask interface, replacement for full face mask, each A7031

DME-Other DME · category DE001N

5 suppliers15 claims42 services$27.43 avg. paid by Medicare

Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034

DME-Other DME · category DE001N

5 suppliers12 claims12 services$46.98 avg. paid by Medicare

Headgear used with positive airway pressure device A7035

DME-Other DME · category DE001N

8 suppliers21 claims21 services$14.96 avg. paid by Medicare

Tubing used with positive airway pressure device A7037

DME-Other DME · category DE001N

4 suppliers13 claims13 services$9.65 avg. paid by Medicare

Filter, disposable, used with positive airway pressure device A7038

DME-Other DME · category DE001N

7 suppliers19 claims109 services$1.77 avg. paid by Medicare

Water chamber for humidifier, used with positive airway pressure device, replacement, each A7046

DME-Other DME · category DE001N

5 suppliers18 claims18 services$11.39 avg. paid by Medicare

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260

DME-Hospital Beds · category DB000N

1 supplier11 claims11 services$46.97 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

5 suppliers65 claims66 services$14.85 avg. paid by Medicare

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

3 suppliers29 claims29 services$3.39 avg. paid by Medicare

Continuous positive airway pressure (cpap) device E0601

DME-Other DME · category DE001N

2 suppliers13 claims13 services$25.20 avg. paid by Medicare

Transport chair, adult size, patient weight capacity up to and including 300 pounds E1038

DME-Other DME · category DE000N

1 supplier20 claims20 services$5.96 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

5 suppliers105 claims105 services$65.67 avg. paid by Medicare

Portable oxygen concentrator, rental E1392

DME-Oxygen and Supplies · category DC002N

2 suppliers23 claims23 services$30.24 avg. paid by Medicare

Albuterol, up to 2.5 mg and ipratropium bromide, up to 0.5 mg, fda-approved final product, non-compounded, administered through dme J7620

DME-Drugs Administered Through DME · category DG006N

3 suppliers23 claims2,290 services$0.06 avg. paid by Medicare

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553

DME-Other DME · category DE017N

6 suppliers131 claims131 services$187.82 avg. paid by Medicare

Portable gaseous oxygen system, rental; home compressor used to fill portable oxygen cylinders; includes portable containers, regulator, flowmeter, humidifier, cannula or mask, and tubing K0738

DME-Oxygen and Supplies · category DC000N

1 supplier12 claims12 services$32.25 avg. paid by Medicare

Pharmacy dispensing fee for inhalation drug(s); per 30 days Q0513

DME-Other DME · category DE000N

3 suppliers24 claims24 services$18.99 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 12

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

DR. MICHAEL B SOBLE M.D.

Internal Medicine (Medical Oncology)

27750 W HIGHWAY 22, SUITE G80
BARRINGTON, IL 60010

Cook County (847) 842-0850

DR. DONALD F CRONIN MD

Internal Medicine (Nephrology)

27750 W HIGHWAY 22, SUITE 120
BARRINGTON, IL 60010

Cook County (847) 655-7264

RANDY ZIMMERMAN M.D.,P.C.

Obstetrics & Gynecology

27750 W HIGHWAY 22, SUITE 120
BARRINGTON, IL 60010

Cook County (847) 277-0500

THOMAS MICHAEL LESKOVAC MD

Internal Medicine (Cardiovascular Disease)

27750 W HIGHWAY 22, SUITE 240
BARRINGTON, IL 60010

Cook County (847) 829-1600

RANDY RAY ZIMMERMAN MD

Obstetrics & Gynecology

27750 W HIGHWAY 22, STE 120
BARRINGTON, IL 60010

Cook County (847) 277-0500

MINHAJ MUSA M.D.

Internal Medicine

27750 W HIGHWAY 22
BARRINGTON, IL 60010

Cook County (847) 381-5800

DR. TIMOTHY VALE VOTAPKA M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery)

27750 W HIGHWAY 22, SUITE 100
BARRINGTON, IL 60010

Cook County (847) 816-3000

MS. CATHERINE ALEXANDRA HARALDSSON PA-C

Physician Assistant (Surgical)

27750 W HIGHWAY 22, SUITE 100
BARRINGTON, IL 60010

Cook County (847) 816-3000

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 Seng Leong's NPI number?

The NPI number for Seng Leong is 1487750790. It was assigned to this individual provider in the NPPES registry on September 15, 2006.

Where is Seng Leong located?

Seng Leong practices at 27750 W Highway 22, Barrington, IL 60010. The listed phone number is (847) 381-5800.

What is Seng Leong's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Seng Leong enrolled in Medicare?

Yes. Seng Leong 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.

Is Seng Leong affiliated with any hospitals?

According to CMS data, Seng Leong is affiliated with Advocate Sherman Hospital, Northwestern Medicine Mchenry, Advocate Condell Medical Center, Advocate Lutheran General Hospital and Advocate Good Shepherd Hospital.

When was this NPI record last updated?

The NPPES record for Seng Leong was last updated on March 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months 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.