ANNIE CHANG MD
NPI 1568032936
Psychiatry & Neurology - Child & Adolescent Psychiatry in Saint Louis, MO

NPI Status: Active since June 29, 2021

Contact Information

1 CHILDRENS PL
SAINT LOUIS, MO
ZIP 63110
Phone: (314) 286-1700

NPI Profile Information
Primary Taxonomy
Secondary Taxonomies
Secondary Locations
Medicare Participation & PECOS Status
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Psychiatry & Neurology
Child & Adolescent Psychiatry
PECOS Enrolled

About ANNIE CHANG

This page provides the complete NPI Profile along with additional information for Annie Chang, a provider established in Saint Louis, Missouri with a medical specialization in Psychiatry & Neurology, focusing in child & adolescent psychiatry . The healthcare provider is registered in the NPI registry with number 1568032936 assigned on June 2021. The practitioner's primary taxonomy code is 2084P0804X with license number 2025031649 (MO). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1568032936
Provider Name: ANNIE CHANG MD
Gender: Female
Entity Type: Individual
Location Address: 1 CHILDRENS PL SAINT LOUIS, MO 63110
Location Phone: (314) 286-1700
Mailing Address: 660 S EUCLID AVE # 8504 SAINT LOUIS, MO 63110
Mailing Phone: (314) 286-1700
Is Sole Proprietor?: No
Enumeration Date: 06-29-2021
Last Update Date: 07-29-2025
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Location Map

Secondary Locations

4444 Forest Park Ave Ste 2600
Saint Louis, MO 63108
(314) 286-1700

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.: 2025031649
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)
1	2084P0804X	Allopathic & Osteopathic Physicians	Psychiatry & Neurology Child & Adolescent Psychiatry	2024028105 (MO)
2	390200000X	Student, Health Care	Student in an Organized Health Care Education/Training Program	2024028105 (MO)

Medicare Participation & PECOS Enrollment Status

Annie Chang 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
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

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 1568032936, 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 12 → 1 + 2

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 4

Pos 8

Unchanged

Pos 9

Doubled → 6

Check

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 0 → 0 2 → 4 3 → 6