Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. NEAL ZWEIG MD
NPI 1346216538
Specialist in Pittsburgh, PA

Active since February 27, 2006
339 6TH AVE, 5TH FLOOR, PITTSBURGH, PA 15222(412) 560-8762 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

  • Individual
  • Male
  • Specialist

About NEAL ZWEIG

This page provides the complete NPI Profile along with additional information for Neal Zweig, a provider established in Pittsburgh, Pennsylvania with a medical specialization in Specialist. The healthcare provider is registered in the NPI registry with number 1346216538 assigned on February 2006. The practitioner's primary taxonomy code is 174400000X with license number MD007131E (PA). The provider is registered as an individual and his NPI record was last updated July 2026.

NPI
1346216538
Provider Name
DR. NEAL ZWEIG MD
Gender
Male
Entity Type
Individual
Location Address
339 6TH AVE 5TH FLOOR PITTSBURGH, PA 15222
Location Phone
(412) 560-8762
Mailing Address
339 6TH AVE 5TH FLOOR PITTSBURGH, PA 15222
Mailing Phone
(412) 560-8762
Is Sole Proprietor?
No
Enumeration Date
02-27-2006
Last Update Date
07-13-2026
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Location Map

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

Specialist

Taxonomy Code
174400000X
Type
Other Service Providers
License No.
MD007131E
License State
PA
Taxonomy Description
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

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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 1346216538, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

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

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 8 + 6 + 4 + 1 + 1 + 2 + 5 + 6 + 24 = 62

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

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1346216538.

Other Providers at the Same Location


The following 11 providers are registered at the same or a nearby location.

Internal Medicine
339 6TH AVE, 5TH FLOOR HEINZ 57 CENTER
PITTSBURGH, PA 15222
Internal Medicine
339 6TH AVE, 5TH FLOOR
PITTSBURGH, PA 15222
Non-Pharmacy Dispensing Site
339 6TH AVE, HEINZ 57 CENTER 5TH FLOOR
PITTSBURGH, PA 15222
Counselor (Professional)
339 6TH AVE
PITTSBURGH, PA 15222
Specialist
339 6TH AVE, 5TH FLOOR
PITTSBURGH, PA 15222
Physical Therapist
339 6TH AVE
PITTSBURGH, PA 15222
Internal Medicine (Rheumatology)
339 6TH AVE, 4TH FLOOR
PITTSBURGH, PA 15222
Internal Medicine
339 6TH AVE, 5TH FLOOR
PITTSBURGH, PA 15222
Nurse Practitioner (Primary Care)
339 6TH AVE
PITTSBURGH, PA 15222
Specialist
339 6TH AVE, 4TH FLOOR
PITTSBURGH, PA 15222
Specialist
339 6TH AVE, 4TH FLOOR
PITTSBURGH, PA 15222

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1346216538, enumerated as an "individual" on February 27, 2006.

The provider is located at 339 6TH AVE 5TH FLOOR PITTSBURGH, PA 15222 and the phone number is (412) 560-8762.

Specialist with taxonomy code 174400000X.