Rosenthal & Siekanowicz, LLC
NPI 1225157407 · Specialist · Silver Spring, MD
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rosenthal & Siekanowicz, LLC is a Specialist organization in Silver Spring, MD (NPI 1225157407).
Provider details
- NPI number
- 1225157407
- Entity type
- Organization
- Primary specialty
- SpecialistOther Service Providers
- Organization subpart
- No
- Authorized official
- Claudia Mendoza, Billing Administrator(301) 681-3100
- License
- D18094 (MD)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-28
- Last updated
- 2009-05-07
Frequently asked questions
- What is Rosenthal & Siekanowicz, LLC's NPI number?
- Rosenthal & Siekanowicz, LLC's National Provider Identifier (NPI) is 1225157407, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Rosenthal & Siekanowicz, LLC?
- Rosenthal & Siekanowicz, LLC is classified in the NPPES registry as Specialist (Other Service Providers).
- Where is Rosenthal & Siekanowicz, LLC located?
- Rosenthal & Siekanowicz, LLC's practice location on file with NPPES is 10313 Georgia Avenue, Silver Spring, MD 20902-5006.
- What is Rosenthal & Siekanowicz, LLC's phone number?
- The practice phone number listed in the NPPES registry for Rosenthal & Siekanowicz, LLC is (301) 681-3100.
- Does Rosenthal & Siekanowicz, LLC accept Medicare?
- Rosenthal & Siekanowicz, LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Rosenthal & Siekanowicz, LLC?
- The authorized official listed on Rosenthal & Siekanowicz, LLC's NPPES record is Claudia Mendoza, Billing Administrator. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Rosenthal & Siekanowicz, LLC's NPI active?
- Yes — Rosenthal & Siekanowicz, LLC's NPI (1225157407) is active in the NPPES registry as of the last update on 2009-05-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.