CHI GEORGE ZHAO M.D.
NPI 1083820443
Psychiatry & Neurology - Sleep Medicine in Leesburg, VA

NPI Status: Active since May 15, 2007

Contact Information

44035 RIVERSIDE PKWY STE 400
LEESBURG, VA
ZIP 20176
Phone: (703) 858-5421
Fax: (703) 858-9573

NPI Profile Information
Primary Taxonomy
Secondary Taxonomies
Secondary Locations
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Psychiatry & Neurology
Sleep Medicine

About CHI ZHAO

This page provides the complete NPI Profile along with additional information for Chi Zhao, a provider established in Leesburg, Virginia with a medical specialization in Psychiatry & Neurology, focusing in sleep medicine . The healthcare provider is registered in the NPI registry with number 1083820443 assigned on May 2007. The practitioner's primary taxonomy code is 2084S0012X with license number 0101249659 (VA). The provider is registered as an individual and his NPI record was last updated 6 years ago.

NPI: 1083820443
Provider Name: CHI GEORGE ZHAO M.D.
Gender: Male
Entity Type: Individual
Location Address: 44035 RIVERSIDE PKWY STE 400 LEESBURG, VA 20176
Location Phone: (703) 858-5421
Location Fax: (703) 858-9573
Mailing Address: 2901 TELESTAR CT STE 300 FALLS CHURCH, VA 22042
Mailing Phone: (703) 591-1688
Mailing Fax: (703) 858-9573
Is Sole Proprietor?: No
Enumeration Date: 05-15-2007
Last Update Date: 10-29-2020
Code Navigator

Location Map

Secondary Locations

2901 Telestar Ct Ste 440
Falls Church, VA 22042
(703) 621-4503
2901 Telestar Ct # 100
Falls Church, VA 22042
(703) 621-4503
130 Park St SE Ste 100
Vienna, VA 22180
(703) 281-1265
130 Park St SE Ste 100
Vienna, VA 22180
(703) 281-1265
2901 Telestar Ct Ste 150
Falls Church, VA 22042
(703) 208-9790
1005 N Glebe Rd Ste 750
Arlington, VA 22201
(703) 524-7202
24440 Stone Springs Blvd
Dulles, VA 20166
(571) 349-4000
3580 Joseph Siewick Dr Ste 305
Fairfax, VA 22033
(703) 648-3266
24430 Stone Springs Blvd Unit 425
Dulles, VA 20166
(703) 722-5860
1850 Town Center Pkwy Ste 550
Reston, VA 20190
(703) 437-5977
205 Hirst Rd Ste 101
Purcellville, VA 20132
(703) 723-8664
44035 Riverside Pkwy Ste 400
Leesburg, VA 20176
(703) 858-5421
4660 Kenmore Ave Ste 1200
Alexandria, VA 22304
(703) 751-8111
2901 Telestar Ct Ste 200
Falls Church, VA 22042
(703) 573-3494

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 Sleep Medicine
Taxonomy Code: 2084S0012X
Type: Allopathic & Osteopathic Physicians
License No.: 0101249659
License State: VA
Taxonomy Description: A Psychiatrist or Neurologist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders.

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	2084N0400X	Allopathic & Osteopathic Physicians	Psychiatry & Neurology Neurology	0101249659 (VA)

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 1083820443, we treat the final digit (3) 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 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 3).

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 → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 8

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 8 → 16 → 7 8 → 16 → 7 0 → 0 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 6 + 3 + 1 + 6 + 2 + 0 + 4 + 8 + 24 = 57

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

The next multiple of ten after 57 is 60. The difference is the calculated check digit.

60 - 57 = 3

This NPI is valid

The calculated check digit is 3, which matches the last digit of 1083820443.