MICHAEL S GROCKI M.D.P.A.
NPI 1346351103
Internal Medicine in Kerrville, TX

NPI Status: Active since August 31, 2006

Contact Information

703 HILL COUNTRY DR STE 201
KERRVILLE, TX
ZIP 78028
Phone: (830) 257-1814
Fax: (830) 257-1083

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  • Organization
  • Internal Medicine
  • CLIA Number: 45D1052943
  • CLIA Cert. Type: Physician Office
  • CLIA Exp. Date: 04-09-2028

About MICHAEL S GROCKI M.D.P.A.

This page provides the complete NPI Profile along with additional information for Michael S Grocki M.d.p.a., an internist established in Kerrville, Texas operating as a Internal Medicine. The healthcare provider is registered in the NPI registry with number 1346351103 assigned on August 2006. The practitioner's primary taxonomy code is 207R00000X with license number M1120 (TX). The provider is registered as an organization and their NPI record was last updated April 2026. 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 Michael S Grocki M.d. (President)

NPI
1346351103
Provider Name
MICHAEL S GROCKI M.D.P.A.
Entity Type
Organization
Location Address
703 HILL COUNTRY DR STE 201 KERRVILLE, TX 78028
Location Phone
(830) 257-1814
Location Fax
(830) 257-1083
Mailing Address
703 HILL COUNTRY DR STE 201 KERRVILLE, TX 78028
Mailing Phone
(830) 257-1814
Mailing Fax
(830) 257-1083
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
08-31-2006
Last Update Date
04-23-2026
Code Navigator

An internist like Michael S Grocki M.d.p.a. is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, 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

Internal Medicine

Taxonomy Code
207R00000X
Type
Allopathic & Osteopathic Physicians
License No.
M1120
License State
TX
Taxonomy Description
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Group Taxonomy 193400000X 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

MICHAEL S GROCKI M.D.

Authorized Official Title
PRESIDENT
Authorized Official Phone
(830) 257-1814

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
45D1052943
Facility Type
Physician Office
Certificate Effective Date
April 10, 2026
Certificate Expiration Date
April 09, 2028
Laboratory Director
MICHAEL S. GROCKI
Certificate Type
Certificate of Waiver
Certificate Type Description
This CLIA certificate is issued to Michael S Grocki M.d.p.a. 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.

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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 1346351103, 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
1
Doubled → 2
Pos 2
3
Unchanged
Pos 3
4
Doubled → 8
Pos 4
6
Unchanged
Pos 5
3
Doubled → 6
Pos 6
5
Unchanged
Pos 7
1
Doubled → 2
Pos 8
1
Unchanged
Pos 9
0
Doubled → 0
Check
3
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 3 → 6 1 → 2 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 8 + 6 + 6 + 5 + 2 + 1 + 0 + 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 1346351103.

Other Providers at the Same Location


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

Internal Medicine
703 HILL COUNTRY DR STE 201
KERRVILLE, TX 78028

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1346351103, enumerated as an "organization" on August 31, 2006.

The provider is located at 703 HILL COUNTRY DR STE 201 KERRVILLE, TX 78028 and the phone number is (830) 257-1814.

Internal Medicine with taxonomy code 207R00000X.