DR. MARK STEVEN REITER M.D.
NPI 1902864408
Internal Medicine in Oak Lawn, IL
NPI Status: Active since May 03, 2006
Contact Information
4400 W 95TH ST
OAK LAWN, IL
ZIP 60453
Phone: (708) 499-2323
Fax: (708) 499-2324
- Individual
- Male
- Internal Medicine
About MARK REITER
This page provides the complete NPI Profile along with additional information for Mark Reiter, an internist established in Oak Lawn, Illinois with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1902864408 assigned on May 2006. The practitioner's primary taxonomy code is 207R00000X. The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1902864408
- Provider Name
- DR. MARK STEVEN REITER M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 4400 W 95TH ST OAK LAWN, IL 60453
- Location Phone
- (708) 499-2323
- Location Fax
- (708) 499-2324
- Mailing Address
- 4400 W 95TH ST OAK LAWN, IL 60453
- Mailing Phone
- (708) 499-2323
- Mailing Fax
- (708) 499-2324
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 05-03-2006
- Last Update Date
- 09-11-2025
- Code Navigator
An internist like Mark Reiter 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 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) |
|---|---|---|---|---|
| 1 | 207RG0300X | Allopathic & Osteopathic Physicians | Internal Medicine | (IL) |
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.
Administration of influenza virus vaccine
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
Established patient office or other outpatient visit, 30-39 minutes
Established patient office or other outpatient visit, 40-54 minutes
Influenza vaccine split virus, preservative free
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.
This service was performed 24 times for 24 patientsAn 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.
This service was performed 21 times for 21 patientsThis 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.
This service was performed 143 times for 63 patientsThis 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.
This service was performed 31 times for 25 patientsThe 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.
This service was performed 24 times for 24 patientsReviews for DR. MARK STEVEN REITER M.D.
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NPI 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 1902864408, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 62 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
OAK LAWN, IL 60453
OAK LAWN, IL 60453
OAK LAWN, IL 60453
OAK LAWN, IL 60453
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1902864408, enumerated as an "individual" on May 03, 2006.
The provider is located at 4400 W 95TH ST OAK LAWN, IL 60453 and the phone number is (708) 499-2323.
Internal Medicine with taxonomy code 207R00000X.
