DR. ANTHONY FELDER
NPI 1073444840
Social Worker in Baltimore, MD
NPI Status: Active since May 28, 2026
Contact Information
3500 BOSTON ST STE 434
BALTIMORE, MD
ZIP 21224
Phone: (443) 429-1985
This NPI profile has been added to the NPI registry within the last 30 days.
- Individual
- Male
- Social Worker
About ANTHONY FELDER
This page provides the complete NPI Profile along with additional information for Anthony Felder, a provider established in Baltimore, Maryland with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1073444840 assigned on May 2026. The practitioner's primary taxonomy code is 104100000X with license number 34842 (MD). The provider is registered as an individual and his NPI record was last updated May 2026.
- NPI
- 1073444840
- Provider Name
- DR. ANTHONY FELDER
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 3500 BOSTON ST STE 434 BALTIMORE, MD 21224
- Location Phone
- (443) 429-1985
- Mailing Address
- 3500 BOSTON ST STE 434 BALTIMORE, MD 21224
- Mailing Phone
- (443) 429-1985
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 05-28-2026
- Last Update Date
- 05-28-2026
- Code Navigator
A social worker like Anthony Felder helps patients solve and cope with problems in their everyday lives, diagnoses and treats mental, behavioral, and emotional problems. Social workers help in wide range of situations, such as adopting a child, illness, divorce, or unemployment.
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
Social Worker
- Taxonomy Code
- 104100000X
- Type
- Behavioral Health & Social Service Providers
- License No.
- 34842
- License State
- MD
- Taxonomy Description
- A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
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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 1073444840, we treat the final digit (0) 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 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 0).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 70 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 4 providers are registered at the same or a nearby location.
BALTIMORE, MD 21224
BALTIMORE, MD 21224
BALTIMORE, MD 21224
BALTIMORE, MD 21224
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1073444840, enumerated as an "individual" on May 28, 2026.
The provider is located at 3500 BOSTON ST STE 434 BALTIMORE, MD 21224 and the phone number is (443) 429-1985.
Social Worker with taxonomy code 104100000X.
