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Mark Isaacs, M.D.
NPI 1396785598 · Specialist · Walnut Creek, CA
Mark Isaacs, M.D. is a Specialist provider in Walnut Creek, CA (NPI 1396785598).
Provider details
- NPI number
- 1396785598
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G32292 (CA)
Specialties & taxonomies
Other Service Providers
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
20 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
1981 N Broadway Ste 270
Walnut Creek, CA 94596-3886
Phone: (925) 932-6442
Fax: (925) 932-6260
Street-level locationGet directions
Mailing address
630 Thomas L Berkley Way
Oakland, CA 94612-1865
Registry dates
- Enumerated
- 2006-06-07
- Last updated
- 2023-01-25
- Certified
- 2023-01-09
Frequently asked questions
- What is Mark Isaacs's NPI number?
- Mark Isaacs's National Provider Identifier (NPI) is 1396785598, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Isaacs's specialty?
- Mark Isaacs is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Mark Isaacs located?
- Mark Isaacs's practice location on file with NPPES is 1981 N Broadway Ste 270, Walnut Creek, CA 94596-3886.
- What is Mark Isaacs's phone number?
- The practice phone number listed in the NPPES registry for Mark Isaacs is (925) 932-6442.
- Is Mark Isaacs's NPI active?
- Yes — Mark Isaacs's NPI (1396785598) is active in the NPPES registry as of the last update on 2023-01-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.