Thaddeus Mamienski, D.O.
NPI 1104979194 · Obstetrics & Gynecology Physician · Bethesda, MD
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thaddeus Mamienski, D.O. is a Obstetrics & Gynecology Physician provider in Bethesda, MD (NPI 1104979194).
Provider details
- NPI number
- 1104979194
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 0102201967 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2007-01-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Thaddeus Mamienski's NPI number?
- Thaddeus Mamienski's National Provider Identifier (NPI) is 1104979194, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thaddeus Mamienski's specialty?
- Thaddeus Mamienski is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Thaddeus Mamienski located?
- Thaddeus Mamienski's practice location on file with NPPES is 8901 Wisconsin Ave, Bethesda, MD 20889-0001.
- What is Thaddeus Mamienski's phone number?
- The practice phone number listed in the NPPES registry for Thaddeus Mamienski is (215) 872-7216.
- Does Thaddeus Mamienski accept Medicare?
- Thaddeus Mamienski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thaddeus Mamienski's NPI active?
- Yes — Thaddeus Mamienski's NPI (1104979194) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.