DOWNTOWN BALTIMORE FAMILY CARE
NPI 1821001942
Clinic/Center - Medical Specialty in Baltimore, MD
NPI Status: Active since August 14, 2006
Contact Information
1147 S HANOVER ST
BALTIMORE, MD
ZIP 21230
Phone: (410) 752-5425
Fax: (443) 320-1581
NPPES record last updated: August 21, 2014. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Organization
- Clinic/Center
- Medical Specialty
- CLIA Number: 21D0216698
- CLIA Cert. Type: Physician Office
- CLIA Exp. Date: 10-29-2026
About DOWNTOWN BALTIMORE FAMILY CARE
This page provides the complete NPI Profile along with additional information for Downtown Baltimore Family Care, a provider established in Baltimore, Maryland operating as a Clinic/center, focusing in medical specialty . The healthcare provider is registered in the NPI registry with number 1821001942 assigned on August 2006. The practitioner's primary taxonomy code is 261QM2500X. The provider is registered as an organization and their NPI record was last updated 12 years ago. The provider's is doing business as Downtown Baltimore Family Care. The authorized official of this NPI record is Dr. Marc Stephen Posner Md (President)
- NPI
- 1821001942
- Provider Legal Name
- MARC S POSNER MD PA
- Other Organization Name
- DOWNTOWN BALTIMORE FAMILY CARE
- Other Name Type
- Doing Business As (3)
- Entity Type
- Organization
- Location Address
- 1147 S HANOVER ST BALTIMORE, MD 21230
- Location Phone
- (410) 752-5425
- Location Fax
- (443) 320-1581
- Mailing Address
- 1147 S HANOVER ST BALTIMORE, MD 21230
- Mailing Phone
- (410) 752-5425
- Mailing Fax
- (443) 320-1581
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 08-14-2006
- Last Update Date
- 08-21-2014
- Code Navigator
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 Medical Specialty
- Taxonomy Code
- 261QM2500X
- Type
- Ambulatory Health Care Facilities
- Taxonomy Description
- An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to a specific area of medical specialization. Frequently used for Title V related Children's Specialty services or to meet specific public health needs (e.g., infectious diseases or breast and cervical cancer).
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Additional Identifiers
The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.
| Identifier | Type / Code | Identifier State | Identifier Issuer |
|---|---|---|---|
| 977841100 | MEDICAID (05) | MD | |
| 6805 | MEDICARE PIN (08) | MD |
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
- 21D0216698
- Facility Type
- Physician Office
- Certificate Effective Date
- October 30, 2024
- Certificate Expiration Date
- October 29, 2026
- Laboratory Director
- MARC S. POSNER MD
- Certificate Type
- Certificate of Waiver
- Certificate Type Description
- This CLIA certificate is issued to Downtown Baltimore Family Care 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 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 1821001942, we treat the final digit (2) 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 58. The final step is to find the difference between that total and the next multiple of ten (60 - 58 = 2).
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 58 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 7 providers are registered at the same or a nearby location.
BALTIMORE, MD 21230
BALTIMORE, MD 21230
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1821001942, enumerated as an "organization" on August 14, 2006.
The provider is located at 1147 S HANOVER ST BALTIMORE, MD 21230 and the phone number is (410) 752-5425.
Clinic/Center with taxonomy code 261QM2500X and a focus in Medical Specialty.
The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.
