MARK A RIDDLE M.D.
NPI 1316989304
Psychiatry & Neurology - Child & Adolescent Psychiatry in Columbia, MD

NPI Status: Active since June 12, 2006

Contact Information

5500 KNOLL NORTH DR STE 370
COLUMBIA, MD
ZIP 21045
Phone: (410) 837-2050
Fax: (866) 629-0091

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  • Individual
  • Male
  • Psychiatry & Neurology
  • Child & Adolescent Psychiatry

About MARK RIDDLE

This page provides the complete NPI Profile along with additional information for Mark Riddle, a provider established in Columbia, Maryland with a medical specialization in Psychiatry & Neurology, focusing in child & adolescent psychiatry . The healthcare provider is registered in the NPI registry with number 1316989304 assigned on June 2006. The practitioner's primary taxonomy code is 2084P0804X with license number D0045696 (MD). The provider is registered as an individual and his NPI record was last updated 4 years ago.

NPI
1316989304
Provider Name
MARK A RIDDLE M.D.
Gender
Male
Entity Type
Individual
Location Address
5500 KNOLL NORTH DR STE 370 COLUMBIA, MD 21045
Location Phone
(410) 837-2050
Location Fax
(866) 629-0091
Mailing Address
1111 N CHARLES ST BALTIMORE, MD 21201
Mailing Phone
(410) 837-2050
Mailing Fax
(866) 629-0091
Is Sole Proprietor?
Yes
Enumeration Date
06-12-2006
Last Update Date
07-21-2022
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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.
D0045696
License State
MD
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.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
162501200MEDICAID (05)MD 

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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 1316989304, we treat the final digit (4) 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 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).

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

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 2 + 6 + 1 + 8 + 8 + 1 + 8 + 3 + 0 + 24 = 66

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

The next multiple of ten after 66 is 70. The difference is the calculated check digit.

70 - 66 = 4
This NPI is valid
The calculated check digit is 4, which matches the last digit of 1316989304.

Other Providers at the Same Location


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

Psychologist (Clinical)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Social Worker (Clinical)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Social Worker (Clinical)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Nurse Practitioner (Family)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Nurse Practitioner (Psychiatric/Mental Health)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Social Worker (Clinical)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Social Worker (School)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Preventive Medicine (Public Health & General Preventive Medicine)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Nurse Practitioner (Family)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Nurse Practitioner (Family)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Social Worker (Clinical)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Dentist (General Practice)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Nurse Practitioner
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Social Worker (Clinical)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Social Worker
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Social Worker (Clinical)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Dietitian, Registered
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Family Medicine
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Social Worker (Clinical)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045
Social Worker (Clinical)
5500 KNOLL NORTH DR STE 370
COLUMBIA, MD 21045

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1316989304, enumerated as an "individual" on June 12, 2006.

The provider is located at 5500 KNOLL NORTH DR STE 370 COLUMBIA, MD 21045 and the phone number is (410) 837-2050.

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

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.