MICHAEL HEFFERNAN
NPI 1891374906
Internal Medicine in Chicago, IL

Active since April 06, 2021PECOS Enrolled
1620 W HARRISON ST, CHICAGO, IL 60612(312) 942-7100 Get Directions Write a Review

NPPES record last updated: June 18, 2021. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jun 18, 2021, Apr 6, 2021 (2 updates tracked since 2021).

  • Individual
  • Male
  • Internal Medicine
  • PECOS Enrolled

About MICHAEL HEFFERNAN

This page provides the complete NPI Profile along with additional information for Michael Heffernan, an internist established in Chicago, Illinois with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1891374906 assigned on April 2021. The practitioner's primary taxonomy code is 207R00000X with license number 125.078139 (IL). The provider is registered as an individual and his NPI record was last updated 5 years ago.

NPI
1891374906
Provider Name
MICHAEL HEFFERNAN
Gender
Male
Entity Type
Individual
Location Address
1620 W HARRISON ST CHICAGO, IL 60612
Location Phone
(312) 942-7100
Mailing Address
1620 W HARRISON ST CHICAGO, IL 60612
Is Sole Proprietor?
Yes
Enumeration Date
04-06-2021
Last Update Date
06-18-2021
Code Navigator

An internist like Michael Heffernan is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

Location Map

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Internal Medicine

Taxonomy Code
207R00000X
Type
Allopathic & Osteopathic Physicians
License No.
125.078139
License State
IL
Taxonomy Description
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.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1390200000XStudent, Health Care

Student in an Organized Health Care Education/Training Program

 

Medicare Participation & PECOS Enrollment Status

Michael Heffernan is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME) and a Home Health Agency (HHA).

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: No

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Hospital discharge day management, more than 30 minutes

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.

This service was performed 15 times for 15 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

This service was performed 15 times for 15 patients

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

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.

This service was performed 32 times for 17 patients

Physician Visit Costs

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 60612 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99204

  • Average New Patient Price $138.86
  • Minimum New Patient Price $60.08
  • Maximum New Patient Price $183.39
  • Average New Patient Copayment $34.71
  • Minimum New Patient Copayment $15.02
  • Maximum New Patient Copayment $45.84

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $105.7
  • Minimum Established Patient Price $18.97
  • Maximum Established Patient Price $148.12
  • Average Established Patient Copayment $26.42
  • Minimum Established Patient Copayment $4.74
  • Maximum Established Patient Copayment $37.03

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Reviews for MICHAEL HEFFERNAN

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NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1891374906, we treat the final digit (6) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 74. The final step is to find the difference between that total and the next multiple of ten (80 - 74 = 6).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
1
Unchanged
Pos 5
3
Doubled → 6
Pos 6
7
Unchanged
Pos 7
4
Doubled → 8
Pos 8
9
Unchanged
Pos 9
0
Doubled → 0
Check
6
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 9 → 18 → 9 3 → 6 4 → 8 0 → 0

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 8 + 1 + 8 + 1 + 6 + 7 + 8 + 9 + 0 + 24 = 74

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 74 is 80. The difference is the calculated check digit.

80 - 74 = 6
This NPI is valid
The calculated check digit is 6, which matches the last digit of 1891374906.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Emergency Medicine
1620 W HARRISON ST, DEPT. OF EMERGENCY MEDICINE TOWER
CHICAGO, IL 60612
Emergency Medicine
1620 W HARRISON ST, DEPARTMENT OF EMERGENCY MEDICINE
CHICAGO, IL 60612
Social Worker (Clinical)
1620 W HARRISON ST, TOWER RESOURCE CENTER, STE 04527
CHICAGO, IL 60612
Student in an Organized Health Care Education/Training Program
1620 W HARRISON ST
CHICAGO, IL 60612
Registered Nurse (Pediatrics)
1620 W HARRISON ST
CHICAGO, IL 60612
Dietitian, Registered
1620 W HARRISON ST
CHICAGO, IL 60612
Registered Nurse (Neonatal Intensive Care)
1620 W HARRISON ST
CHICAGO, IL 60612
Plastic Surgery
1620 W HARRISON ST
CHICAGO, IL 60612
Internal Medicine
1620 W HARRISON ST
CHICAGO, IL 60612
Psychiatry & Neurology (Neurology)
1620 W HARRISON ST
CHICAGO, IL 60612
Psychiatry & Neurology (Psychiatry)
1620 W HARRISON ST
CHICAGO, IL 60612
Orthopaedic Surgery
1620 W HARRISON ST
CHICAGO, IL 60612
Internal Medicine (Infectious Disease)
1620 W HARRISON ST
CHICAGO, IL 60612
Nurse Practitioner (Neonatal, Critical Care)
1620 W HARRISON ST
CHICAGO, IL 60612
Anesthesiology
1620 W HARRISON ST
CHICAGO, IL 60612
Surgery
1620 W HARRISON ST
CHICAGO, IL 60612
Nurse Practitioner (Psychiatric/Mental Health)
1620 W HARRISON ST
CHICAGO, IL 60612
Nurse Anesthetist, Certified Registered
1620 W HARRISON ST
CHICAGO, IL 60612
Nurse Practitioner (Acute Care)
1620 W HARRISON ST
CHICAGO, IL 60612
Social Worker (Clinical)
1620 W HARRISON ST
CHICAGO, IL 60612

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1891374906, enumerated as an "individual" on April 06, 2021.

The provider is located at 1620 W HARRISON ST CHICAGO, IL 60612 and the phone number is (312) 942-7100.

Internal Medicine with taxonomy code 207R00000X.