Mary Ellen Guroy, MD
NPI 1801971882 · Infectious Disease Physician · San Rafael, CA
Mary Ellen Guroy, MD is a Infectious Disease Physician provider in San Rafael, CA (NPI 1801971882).
Provider details
- NPI number
- 1801971882
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A37441 (CA)
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
- 2006-10-26
- Last updated
- 2012-01-12
Frequently asked questions
- What is Mary Ellen Guroy's NPI number?
- Mary Ellen Guroy's National Provider Identifier (NPI) is 1801971882, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Ellen Guroy's specialty?
- Mary Ellen Guroy is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Ellen Guroy located?
- Mary Ellen Guroy's practice location on file with NPPES is 3260 Kerner Blvd, San Rafael, CA 94901-4840.
- What is Mary Ellen Guroy's phone number?
- The practice phone number listed in the NPPES registry for Mary Ellen Guroy is (415) 473-4400.
- Is Mary Ellen Guroy's NPI active?
- Yes — Mary Ellen Guroy's NPI (1801971882) is active in the NPPES registry as of the last update on 2012-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.