OrganizationActive
John Muir Perinatal Medical Group
NPI 1558397141 · Maternal & Fetal Medicine Physician · Walnut Creek, CA
Provider details
- NPI number
- 1558397141
- Entity type
- Organization
- Primary specialty
- Maternal & Fetal Medicine PhysicianAllopathic & Osteopathic Physicians
- Parent organization
- John Muir Physician Network
- Organization subpart
- Yes
- Authorized official
- M. Sorenson, Vice President(925) 952-2888
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
1656 N. Calfiornia Blvd.
Suite 300
Walnut Creek, CA 94596
Phone: (925) 941-7955
Fax: (925) 941-7986
Street-level locationGet directions
Mailing address
Po Box 9017
Walnut Creek, CA 94598-0917
Registry dates
- Enumerated
- 2006-06-24
- Last updated
- 2009-12-17
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.