THOMAS S. ZIERING MD LLC
NPI 1497293815
Clinic/Center - Primary Care in Morristown, NJ

Active since February 06, 2017CLIA 31D2255130 · Waiver
1201 MOUNT KEMBLE AVE STE 2D, MORRISTOWN, NJ 07960(908) 221-1919(908) 221-0404 Get Directions Write a Review

NPPES record last updated: May 27, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: May 27, 2025, Feb 24, 2023, Feb 6, 2017 (3 updates tracked since 2017).

  • Organization
  • Clinic/Center
  • Primary Care
  • CLIA Number: 31D2255130
  • CLIA Cert. Type: Physician Office
  • CLIA Exp. Date: 03-09-2028

About THOMAS S. ZIERING MD LLC

This page provides the complete NPI Profile along with additional information for Thomas S. Ziering Md Llc, a primary care provider established in Morristown, New Jersey operating as a Clinic/center, focusing in primary care . The healthcare provider is registered in the NPI registry with number 1497293815 assigned on February 2017. The practitioner's primary taxonomy code is 261QP2300X with license number MA 52170 (NJ). The provider is registered as an organization and their NPI record was last updated one year ago. The authorized official of this NPI record is Dr. Thomas S. Ziering M.d. (Physican/principal)

NPI
1497293815
Provider Name
THOMAS S. ZIERING MD LLC
Entity Type
Organization
Location Address
1201 MOUNT KEMBLE AVE STE 2D MORRISTOWN, NJ 07960
Location Phone
(908) 221-1919
Location Fax
(908) 221-0404
Mailing Address
1201 MOUNT KEMBLE AVE STE 2D MORRISTOWN, NJ 07960
Mailing Phone
(908) 221-1919
Mailing Fax
(908) 221-0404
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
02-06-2017
Last Update Date
05-27-2025
Code Navigator

A primary care provider (PCP) like Thomas S. Ziering Md Llc sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc .

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

Clinic/Center Primary Care

Taxonomy Code
261QP2300X
Type
Ambulatory Health Care Facilities
License No.
MA 52170
License State
NJ

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. THOMAS S. ZIERING M.D.

Authorized Official Title
PHYSICAN/PRINCIPAL
Authorized Official Phone
(908) 221-1919

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number
31D2255130
Facility Type
Physician Office
Certificate Effective Date
March 10, 2026
Certificate Expiration Date
March 09, 2028
Laboratory Director
THOMAS S. ZIERING
Certificate Type
Certificate of Waiver
Certificate Type Description
This CLIA certificate is issued to Thomas S. Ziering Md Llc to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.

Reviews for THOMAS S. ZIERING MD LLC

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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 1497293815, we treat the final digit (5) 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 75. The final step is to find the difference between that total and the next multiple of ten (80 - 75 = 5).

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

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 1 + 8 + 7 + 4 + 9 + 6 + 8 + 2 + 24 = 75

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

The next multiple of ten after 75 is 80. The difference is the calculated check digit.

80 - 75 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1497293815.

Other Providers at the Same Location


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

Family Medicine
1201 MOUNT KEMBLE AVE STE 2D
MORRISTOWN, NJ 07960

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1497293815, enumerated as an "organization" on February 06, 2017.

The provider is located at 1201 MOUNT KEMBLE AVE STE 2D MORRISTOWN, NJ 07960 and the phone number is (908) 221-1919.

Clinic/Center with taxonomy code 261QP2300X and a focus in Primary Care.