DR. JAMES MIKOLAJCZAK M.D.
NPI 1760502207
Psychiatry & Neurology - Child & Adolescent Psychiatry in Clayton, MO

NPI Status: Active since March 29, 2007

Contact Information

141 N MERAMEC AVE
CLAYTON, MO
ZIP 63105
Phone: (314) 726-1666

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  • Individual
  • Male
  • Years of Experience 55
  • Psychiatry & Neurology
  • Child & Adolescent Psychiatry
  • May Accept Medicare Approved Payment
  • PECOS Enrolled

About JAMES MIKOLAJCZAK

This page provides the complete NPI Profile along with additional information for James Mikolajczak, a provider established in Clayton, Missouri with a medical specialization in Psychiatry & Neurology, focusing in child & adolescent psychiatry and more than 55 years of experience. He graduated from Saint Louis University School Of Medicine in 1972. The healthcare provider is registered in the NPI registry with number 1760502207 assigned on March 2007. The practitioner's primary taxonomy code is 2084P0804X with license number 34665 (MO). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1760502207
Provider Name
DR. JAMES MIKOLAJCZAK M.D.
Gender
Male
Entity Type
Individual
Location Address
141 N MERAMEC AVE CLAYTON, MO 63105
Location Phone
(314) 726-1666
Mailing Address
141 N MERAMEC AVE CLAYTON, MO 63105
Medical School Name
SAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduation Year
1972
Is Sole Proprietor?
Yes
Enumeration Date
03-29-2007
Last Update Date
09-11-2025
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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

Psychiatry & Neurology Child & Adolescent Psychiatry

Taxonomy Code
2084P0804X
Type
Allopathic & Osteopathic Physicians
License No.
34665
License State
MO
Taxonomy Description
Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.

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)
12084P0800XAllopathic & Osteopathic Physicians

Psychiatry & Neurology
Psychiatry

34665 (MO)
22084P0805XAllopathic & Osteopathic Physicians

Psychiatry & Neurology
Geriatric Psychiatry

34665 (MO)

Medicare Participation & PECOS Enrollment Status

James Mikolajczak is registered with Medicare but maybe doesn't accept claims assignment. If you are a Medicare beneficiary call and confirm with the provider before seeking any services.

James Mikolajczak 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), a Home Health Agency (HHA) and Power Mobility Devices.

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

  • PECOS PAC ID: 8224120266

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20070822001340

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Maybe

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • 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: Yes

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.

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 889 times for 18 patients

Psychotherapy with evaluation and management visit, 45 minutes

Psychotherapy with evaluation and management is a 45-minute session where a healthcare provider discusses your mental and emotional health. They assess your current state, manage any issues, and help you develop coping strategies. This service aims to improve your overall well-being.

This service was performed 800 times for 17 patients

Reviews for DR. JAMES MIKOLAJCZAK 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 1760502207, we treat the final digit (7) 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 43. The final step is to find the difference between that total and the next multiple of ten (50 - 43 = 7).

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
7
Unchanged
Pos 3
6
Doubled → 12 → 1 + 2
Pos 4
0
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
0
Unchanged
Pos 7
2
Doubled → 4
Pos 8
2
Unchanged
Pos 9
0
Doubled → 0
Check
7
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 6 → 12 → 3 5 → 10 → 1 2 → 4 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 1 + 2 + 0 + 1 + 0 + 0 + 4 + 2 + 0 + 24 = 43

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

The next multiple of ten after 43 is 50. The difference is the calculated check digit.

50 - 43 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1760502207.

Other Providers at the Same Location


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

Dentist
141 N MERAMEC AVE, STE 14
SAINT LOUIS, MO 63105
Home Health
141 N MERAMEC AVE, #317
CLAYTON, MO 63105
Home Health
141 N MERAMEC AVE, #317
CLAYTON, MO 63105
Internal Medicine
141 N MERAMEC AVE, SUITE 212
SAINT LOUIS, MO 63105
Speech-Language Pathologist
141 N MERAMEC AVE, STE 110A
CLAYTON, MO 63105
Social Worker (Clinical)
141 N MERAMEC AVE, SUITE 210
SAINT LOUIS, MO 63105
Dentist (General Practice)
141 N MERAMEC AVE, SUITE 309
CLAYTON, MO 63105
Social Worker (Clinical)
141 N MERAMEC AVE, STE 303
SAINT LOUIS, MO 63105
Speech-Language Pathologist
141 N MERAMEC AVE, STE 110A
CLAYTON, MO 63105
Social Worker (Clinical)
141 N MERAMEC AVE, STE. 109
SAINT LOUIS, MO 63105
Speech-Language Pathologist
141 N MERAMEC AVE, STE 110A
CLAYTON, MO 63105
Social Worker (Clinical)
141 N MERAMEC AVE, SUITE 305
CLAYTON, MO 63105
Counselor (Professional)
141 N MERAMEC AVE, STE 112
CLAYTON, MO 63105
Social Worker (Clinical)
141 N MERAMEC AVE, SUITE 205
SAINT LOUIS, MO 63105
Speech-Language Pathologist
141 N MERAMEC AVE, STE 110A
CLAYTON, MO 63105
Speech-Language Pathologist
141 N MERAMEC AVE, STE 110A
CLAYTON, MO 63105
Speech-Language Pathologist
141 N MERAMEC AVE, SUITE 110A
CLAYTON, MO 63105
Specialist
141 N MERAMEC AVE, SUITE 208/209
CLAYTON, MO 63105
Dentist (Endodontics)
141 N MERAMEC AVE, SUITE 217
SAINT LOUIS, MO 63105
Specialist/Technologist
141 N MERAMEC AVE, STE 110A
CLAYTON, MO 63105

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1760502207, enumerated as an "individual" on March 29, 2007.

The provider is located at 141 N MERAMEC AVE CLAYTON, MO 63105 and the phone number is (314) 726-1666.

Psychiatry & Neurology with taxonomy code 2084P0804X and a focus in Child & Adolescent Psychiatry.