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Marsha Mckay, D.O.
NPI 1558384206 · Family Medicine Physician · Twain Harte, CA
Marsha Mckay, D.O. is a Family Medicine Physician provider in Twain Harte, CA (NPI 1558384206).
Provider details
- NPI number
- 1558384206
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 20A5680 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
18711 Tiffeni Dr
Suite 16
Twain Harte, CA 95383-9590
Phone: (209) 586-2000
Fax: (209) 586-2075
Street-level locationGet directions
Mailing address
18711 Tiffeni Dr
Twain Harte, CA 95383-9590
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2012-01-18
Frequently asked questions
- What is Marsha Mckay's NPI number?
- Marsha Mckay's National Provider Identifier (NPI) is 1558384206, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marsha Mckay's specialty?
- Marsha Mckay is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marsha Mckay located?
- Marsha Mckay's practice location on file with NPPES is 18711 Tiffeni Dr, Twain Harte, CA 95383-9590.
- What is Marsha Mckay's phone number?
- The practice phone number listed in the NPPES registry for Marsha Mckay is (209) 586-2000.
- Is Marsha Mckay's NPI active?
- Yes — Marsha Mckay's NPI (1558384206) is active in the NPPES registry as of the last update on 2012-01-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.