DR. MARK NATHAN BELKIN M.D.
NPI 1023499498
Internal Medicine - Advanced Heart Failure and Transplant Cardiology in Chicago, IL

Q: What is Mark Belkin's NPI number?

The NPI number for Mark Belkin is 1023499498. It was assigned to this individual provider in the NPPES registry on June 11, 2015.

Q: What is Mark Belkin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Advanced Heart Failure and Transplant Cardiology, with taxonomy code 207RA0001X.

Q: When was this NPI record last updated?

The NPPES record for Mark Belkin was last updated on June 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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 June 11, 2015PECOS EnrolledAccepts Medicare Assignment

97.71/100

CMS Quality Rating

5841 S MARYLAND AVE RM A700, CHICAGO, IL 60637(773) 702-6840(773) 702-2230 Get Directions Write a Review

NPPES record last updated: June 9, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Mark Nathan Belkin M.d. NPPES

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

DR. MARK NATHAN BELKIN M.D. (NPI 1023499498) is an individual advanced heart failure and transplant cardiology provider in Chicago, Illinois, licensed in Illinois (036145187) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS, is affiliated with The University Of Chicago Medical Center, and is a graduate of Rush Medical College Of Rush University (2015).

NPPES Registry Identity

NPI1023499498

Entity TypeIndividualMale

Primary Taxonomy207RA0001X

Provider Legal NameDR. MARK NATHAN BELKINCredential: M.D.

Location Address5841 S MARYLAND AVE RM A700Chicago, IL 60637-1443

Mailing Address150 Harvester Dr Ste 300Burr Ridge, IL 60527-5965

Phone(773) 702-6840

Fax(773) 702-2230

Sole ProprietorYes

Medical School CMSRush Medical College Of Rush UniversityGraduated 2015

Enumeration DateJune 11, 2015

Last NPPES UpdateJune 9, 2026

NPPES CertifiedJune 9, 2026

✔ NPI 1023499498 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Advanced Heart Failure and Transplant CardiologyAllopathic & Osteopathic Physicians

Taxonomy Code207RA0001X

License✔ Licensed in IL · 036145187

Definition

Specialists in Advanced Heart Failure and Transplant Cardiology would participate in the inpatient and outpatient management of patients with advanced heart failure across the spectrum from consideration for high-risk cardiac surgery, cardiac transplantation, or mechanical circulatory support, to pre-and post-operative evaluation and management of patients with cardiac transplants and mechanical support devices, and end-of-life care for patients with end-stage heart failure.

5841 S MARYLAND AVE RM A700, Chicago, IL 60637

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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. Mark Nathan Belkin 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 ID3476856584

PECOS Enrollment IDI20221107000544

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 Mark Belkin reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The University Of Chicago Medical Center

Same address

General Acute Care Hospital

5841 S MARYLAND AVE
Chicago, IL 60637

Reassigned Medicare billing, Illinois enrollment
1,905 clinicians in this Medicare group

NPI 1033218128 (773) 702-1530

University Of Chicago

Same address

Multi-Specialty

5841 S MARYLAND AVE, UCPG/MC 1099
Chicago, IL 60637

Reassigned Medicare billing, Illinois enrollment
Also billed through NPI 1477262046 (Illinois)
2,237 clinicians in this Medicare group

NPI 1821048786 (773) 702-9200

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 12

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

196 services52 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

192 services162 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.

109 services61 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

93 services30 patients

Evaluation of lower heart chamber assist device 93750

An evaluation of a lower heart chamber assist device is a procedure to check the function of an implanted device aiding your heart's lower chambers. This helps ensure optimal heart function by monitoring the device's performance and your heart's response to it.

43 services13 patients

Insertion of tube in right heart chambers for measurement 93451

This procedure involves placing a small, flexible tube into the right side of your heart. It helps assess how your heart is functioning by measuring pressures within the heart chambers. It's a key tool in diagnosing certain heart conditions.

36 services33 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

29 services28 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.

25 services25 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

23 services22 patients

Biopsy of heart muscle 93505

A biopsy of the heart muscle is a procedure where a small piece of heart tissue is taken for examination. This helps doctors identify heart diseases or abnormalities. The procedure involves inserting a thin tube through a vein and into the heart, under local anesthesia.

21 services17 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

20 services11 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

14 services14 patients

Hospital Affiliations CMS Care Compare 5

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

The University Of Chicago Medical Center

Acute Care Hospitals · Chicago, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140088

Location5841 South MarylandChicago, IL 60637 · Cook County

Emergency services Birthing friendly

Ingalls Memorial Hospital

Acute Care Hospitals · Harvey, IL

2/5 CMS rating

OwnershipPhysician

CMS Certification Number140191

Location1 Ingalls DriveHarvey, IL 60426 · Cook County

Emergency services Birthing friendly

Northwestern Memorial Hospital

Acute Care Hospitals · Chicago, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140281

Location251 E Huron StChicago, IL 60611 · Cook County

Emergency services Birthing friendly

Methodist Hospitals Inc

Acute Care Hospitals · Gary, IN

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number150002

Location600 Grant StGary, IN 46402 · Lake County

Emergency services Birthing friendly

Community Hospital

Acute Care Hospitals · Munster, IN

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number150125

Location901 Macarthur BlvdMunster, IN 46321 · Lake County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60637 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

97.71/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

75.43

Promoting Interoperability

100

Improvement Activities

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 Mark Belkin's NPI number?

The NPI number for Mark Belkin is 1023499498. It was assigned to this individual provider in the NPPES registry on June 11, 2015.

Where is Mark Belkin located?

Mark Belkin practices at 5841 S Maryland Ave Rm A700, Chicago, IL 60637. The listed phone number is (773) 702-6840.

What is Mark Belkin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Advanced Heart Failure and Transplant Cardiology, with taxonomy code 207RA0001X.

Is Mark Belkin enrolled in Medicare?

Yes. Mark Belkin 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 Mark Belkin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Belkin reassigns Medicare benefits to 2 organizations: The University Of Chicago Medical Center (Chicago, IL) and University Of Chicago (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 Mark Belkin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Mark Belkin affiliated with any hospitals?

According to CMS data, Mark Belkin is affiliated with The University Of Chicago Medical Center, Ingalls Memorial Hospital, Northwestern Memorial Hospital, Methodist Hospitals Inc and Community Hospital.

When was this NPI record last updated?

The NPPES record for Mark Belkin was last updated on June 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.