HAROLD D. CARLSON MD
NPI 1023013315
Internal Medicine - Interventional Cardiology in Atlanta, GA

NPI Status: Active since June 15, 2005

Contact Information

95 COLLIER RD NW
SUITE 2065
ATLANTA, GA
ZIP 30309
Phone: (404) 605-2800
Fax: (404) 720-0911

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

Individual
Male
Internal Medicine
Interventional Cardiology
Medicare Quality Reporting

About HAROLD CARLSON

This page provides the complete NPI Profile along with additional information for Harold Carlson, an internist established in Atlanta, Georgia with a medical specialization in Internal Medicine, focusing in interventional cardiology . The healthcare provider is registered in the NPI registry with number 1023013315 assigned on June 2005. The practitioner's primary taxonomy code is 207RI0011X with license number 027508 (GA). The provider is registered as an individual and his NPI record was last updated December 2025.

NPI: 1023013315
Provider Name: HAROLD D. CARLSON MD
Gender: Male
Entity Type: Individual
Location Address: 95 COLLIER RD NW SUITE 2065 ATLANTA, GA 30309
Location Phone: (404) 605-2800
Location Fax: (404) 720-0911
Mailing Address: 95 COLLIER RD NW SUITE 2065 ATLANTA, GA 30309
Mailing Phone: (404) 605-2800
Mailing Fax: (404) 720-0911
Is Sole Proprietor?: No
Enumeration Date: 06-15-2005
Last Update Date: 12-24-2025
Code Navigator

An internist like Harold Carlson 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 Interventional Cardiology
Taxonomy Code: 207RI0011X
Type: Allopathic & Osteopathic Physicians
License No.: 027508
License State: GA
Taxonomy Description: An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system.

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	207R00000X	Allopathic & Osteopathic Physicians	Internal Medicine	027508 (GA)
2	207RC0000X	Allopathic & Osteopathic Physicians	Internal Medicine Cardiovascular Disease	027508 (GA)

Quality Reporting

The provider participated in CMS Quality Payment Program. The Quality Payment Program aims to improve population health, reduce costs and improve the care received by Medicare beneficiaries. The following quality measures meet Medicare's statistical reporting standards. Not all providers report the same information, because not all providers give the same services to patients. The quality information is just a snapshot of some the care providers give to their patients. Reporting more or less information is not a reflection of quality.

Quality Measure	Performance	Number of Patients
Care Plan	16%	228
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker or provide an advance care plan
Colorectal Cancer Screening	49%	147
Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer
Diabetes: Eye Exam	11%	35
Percentage of patients 18-75 years of age with diabetes who had a retinal or dilated eye exam by an eye care professional during the measurement period or a negative retinal exam (no evidence of retinopathy) in the 12 months prior to the measurement period
Pneumococcal Vaccination Status for Older Adults	52%	231
Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan	72%	243
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous twelve months of the current encounter Normal Parameters: Age 18 years and older BMI >= 18.5 and < 25 kg/m2
Screening for Osteoporosis for Women Aged 65-85 Years of Age	35%	79
Percentage of female patients aged 65-85 years of age who ever had a central dual-energy X-ray absorptiometry (DXA) to check for osteoporosis

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 1023013315, 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 45. The final step is to find the difference between that total and the next multiple of ten (50 - 45 = 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 4

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 2

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 2 → 4 0 → 0 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 + 0 + 4 + 3 + 0 + 1 + 6 + 3 + 2 + 24 = 45

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

The next multiple of ten after 45 is 50. The difference is the calculated check digit.

50 - 45 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1023013315.