DR. MICHAEL F FLESSNER MD
NPI 1669401857
Internal Medicine in Frederick, MD

NPI Status: Active since July 01, 2006

Contact Information

100 S MARKET ST
FREDERICK COMMUNITY ACTION AGENCY
FREDERICK, MD
ZIP 21701
Phone: (301) 600-1506
Fax: (301) 662-9079

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  • Individual
  • Male
  • Internal Medicine

About MICHAEL FLESSNER

This page provides the complete NPI Profile along with additional information for Michael Flessner, an internist established in Frederick, Maryland with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1669401857 assigned on July 2006. The practitioner's primary taxonomy code is 207R00000X with license number D0035499 (MD). The provider is registered as an individual and his NPI record was last updated 10 years ago.

NPI
1669401857
Provider Name
DR. MICHAEL F FLESSNER MD
Gender
Male
Entity Type
Individual
Location Address
100 S MARKET ST FREDERICK COMMUNITY ACTION AGENCY FREDERICK, MD 21701
Location Phone
(301) 600-1506
Location Fax
(301) 662-9079
Mailing Address
100 S MARKET ST FREDERICK COMMUNITY ACTION AGENCY FREDERICK, MD 21701
Mailing Phone
(301) 600-1506
Mailing Fax
(301) 662-9079
Is Sole Proprietor?
No
Enumeration Date
07-01-2006
Last Update Date
12-06-2016
Code Navigator

An internist like Michael Flessner 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.
D0035499
License State
MD
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.

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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 1669401857, we treat the final digit (7) 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).

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
6
Unchanged
Pos 3
6
Doubled → 12 → 1 + 2
Pos 4
9
Unchanged
Pos 5
4
Doubled → 8
Pos 6
0
Unchanged
Pos 7
1
Doubled → 2
Pos 8
8
Unchanged
Pos 9
5
Doubled → 10 → 1 + 0
Check
7
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 6 → 12 → 3 4 → 8 1 → 2 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 2 + 9 + 8 + 0 + 2 + 8 + 1 + 0 + 24 = 63

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

The next multiple of ten after 63 is 70. The difference is the calculated check digit.

70 - 63 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1669401857.

Other Providers at the Same Location


The following 8 providers are registered at the same or a nearby location.

Nurse Practitioner (Family)
100 S MARKET ST
FREDERICK, MD 21701
Physician Assistant
100 S MARKET ST
FREDERICK, MD 21701
Nurse Practitioner
100 S MARKET ST
FREDERICK, MD 21701
Clinic/Center (Federally Qualified Health Center (FQHC))
100 S MARKET ST
FREDERICK, MD 21701
Nurse Practitioner (Psychiatric/Mental Health)
100 S MARKET ST
FREDERICK, MD 21701
Counselor (Mental Health)
100 S MARKET ST
FREDERICK, MD 21701
Physician Assistant
100 S MARKET ST
FREDERICK, MD 21701
Nurse Practitioner (Primary Care)
100 S MARKET ST
FREDERICK, MD 21701

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1669401857, enumerated as an "individual" on July 01, 2006.

The provider is located at 100 S MARKET ST FREDERICK COMMUNITY ACTION AGENCY FREDERICK, MD 21701 and the phone number is (301) 600-1506.

Internal Medicine with taxonomy code 207R00000X.