Sidney M Marchasin MD Inc
NPI 1285915082 · Preferred Provider Organization · Redwood City, CA
Sidney M Marchasin MD Inc is a Preferred Provider Organization organization in Redwood City, CA (NPI 1285915082).
Provider details
- NPI number
- 1285915082
- Entity type
- Organization
- Primary specialty
- Preferred Provider OrganizationManaged Care Organizations
- Organization subpart
- No
- Authorized official
- Sidney Marchasin, Medical Doctor(650) 363-8352
- License
- A19161 (CA)
Specialties & taxonomies
Managed Care Organizations
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
- 2011-09-07
- Last updated
- 2011-09-07
Frequently asked questions
- What is Sidney M Marchasin MD Inc's NPI number?
- Sidney M Marchasin MD Inc's National Provider Identifier (NPI) is 1285915082, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Sidney M Marchasin MD Inc?
- Sidney M Marchasin MD Inc is classified in the NPPES registry as Preferred Provider Organization (Managed Care Organizations).
- Where is Sidney M Marchasin MD Inc located?
- Sidney M Marchasin MD Inc's practice location on file with NPPES is 39 Birch St, Redwood City, CA 94062-1482.
- What is Sidney M Marchasin MD Inc's phone number?
- The practice phone number listed in the NPPES registry for Sidney M Marchasin MD Inc is (650) 363-8352.
- Who is the authorized official for Sidney M Marchasin MD Inc?
- The authorized official listed on Sidney M Marchasin MD Inc's NPPES record is Sidney Marchasin, Medical Doctor. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Sidney M Marchasin MD Inc's NPI active?
- Yes — Sidney M Marchasin MD Inc's NPI (1285915082) is active in the NPPES registry as of the last update on 2011-09-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.