DERRY PSYCHIATRIC SERVICES, P.C.
NPI 1932235751
Psychiatry & Neurology - Child & Adolescent Psychiatry in Harrisburg, PA

NPI Status: Active since February 26, 2007

Contact Information

4829 DERRY ST
HARRISBURG, PA
ZIP 17111
Phone: (717) 579-2992
Fax: (717) 558-0379

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  • Organization
  • Psychiatry & Neurology
  • Child & Adolescent Psychiatry

About DERRY PSYCHIATRIC SERVICES, P.C.

This page provides the complete NPI Profile along with additional information for Derry Psychiatric Services, P.c., a provider established in Harrisburg, Pennsylvania operating as a Psychiatry & Neurology, focusing in child & adolescent psychiatry . The healthcare provider is registered in the NPI registry with number 1932235751 assigned on February 2007. The practitioner's primary taxonomy code is 2084P0804X with license number OS-008202-L (PA). The provider is registered as an organization and their NPI record was last updated one year ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Dr. Daisy Williams D.o. (Owner)

NPI
1932235751
Provider Name
DERRY PSYCHIATRIC SERVICES, P.C.
Entity Type
Organization
Location Address
4829 DERRY ST HARRISBURG, PA 17111
Location Phone
(717) 579-2992
Location Fax
(717) 558-0379
Mailing Address
4829 DERRY ST HARRISBURG, PA 17111
Mailing Phone
(717) 579-2992
Mailing Fax
(717) 558-0379
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
02-26-2007
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.
OS-008202-L
License State
PA
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

OS-008202-L (PA)

Group Taxonomy 193400000X MULTIPLE SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

DR. DAISY WILLIAMS D.O.

Authorized Official Title
OWNER
Authorized Official Phone
(717) 579-2992

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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 1932235751, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 6 + 2 + 4 + 3 + 1 + 0 + 7 + 1 + 0 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1932235751.

Other Providers at the Same Location


The following 1 provider is registered at the same or a nearby location.

Specialist
4829 DERRY ST
HARRISBURG, PA 17111

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1932235751, enumerated as an "organization" on February 26, 2007.

The provider is located at 4829 DERRY ST HARRISBURG, PA 17111 and the phone number is (717) 579-2992.

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