Mehrnoosh Almassi, MD
Individual provider Active NPI Obstetrics & Gynecology Physician · Walnut Creek, CA
NPI 1679622872 · NPPES record last updated Feb 23, 2026
Key facts
- NPI
- 1679622872
- Entity type
- Individual (NPI type 1)
- Primary specialty
- Obstetrics & Gynecology Physician 207V00000X
- License
- A74962 (CA)
- Practice address
- 1840 San Miguel Dr Ste 100
Walnut Creek, CA 94596-8603 - Phone
- (925) 356-8990
- Fax
- (925) 356-8997
- NPI assigned
- Jan 9, 2007
- Sex
- Female
- Sole proprietor
- No
Organizations & group practices 5
Hospital & facility affiliations 2
Medicare Care Compare profile
- Specialty
- Obstetrics/Gynecology
- Education
- Other, 2003
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
Practice addresses (Care Compare)
1840 San Miguel Dr
Suite 100
Walnut Creek, CA 94596-8603
Phone (925) 356-8990
Hospital & facility affiliations
- John Muir Medical Center - Concord Campus
- John Muir Medical Center - Walnut Creek Campus
Procedures performed for Medicare patients
| Procedure | Number of procedures |
|---|---|
| Removal of the uterus | 1-10 |
Medicare participation
- Medicare fee-for-service enrollment
- Enrolled in CA
- Eligible to order & refer
- Part B services: Yes · DME: Yes · Home health: Yes · Power mobility devices: Yes · Hospice: Yes
Medicare enrollment records
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20090508000496 | CA | Practitioner - Obstetrics/Gynecology | 4183772767 | Reassigns benefits to 2 organizations |
National Provider Directory
- Medicare enrollment (NPD)
- Yes
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| A74962 | CA | MD | Obstetrics & Gynecology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Mehrnoosh Almassi MD Inc | Obstetrics & Gynecology | Current |
Accepting new patients |
| John Muir Health | Past | Accepting new patients | |
| California Pacific Medical Group, Inc. | Past | Accepting new patients | |
| John Muir Health | Past | Accepting new patients |
Locations
2485 High School Ave
Ste 111
Concord, CA 94520
Phone (925) 356-8990
2485 High School Ave
Ste 1
Concord, CA 94520
Phone (925) 356-8990
2700 Grant St
Ste 306
Concord, CA 94520
Phone (925) 356-8990
1840 San Miguel Dr
Ste 100
Walnut Creek, CA 94596
Phone (650) 685-4800
Specialties & licenses
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Obstetrics & Gynecology Physician | 207V00000X | A74962 | CA | Yes |
Addresses
Primary practice location
1840 San Miguel Dr Ste 100
Walnut Creek, CA 94596-8603
Mailing address
1840 San Miguel Dr Ste 100
Walnut Creek, CA 94596-8603
Phone (925) 356-8990
Other providers in Walnut Creek, CA
- Allstar Medical Supply, Inc.
- Desiree Elizabeth Allyn
- Ricardo Almada
- Dorothy Almajose Daffon
- Karen Michelle Alman
- Megan Danielle Aloisio
- Susan Jane Alonso
- Erica Alonzo
- Narayah Aloo
- Crystal Rose Sophia Alpert
All providers in Walnut Creek, CA · Obstetrics & Gynecology Physician in California
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Record last updated by the provider on Feb 23, 2026. Information in NPPES is self-reported and not verified by CMS.
- NUCC Health Care Provider Taxonomy: specialty names.
- Medicare Fee-For-Service Public Provider Enrollment (CMS/PECOS): enrollments, PAC IDs and benefit reassignments.
- Order and Referring (CMS).
- Medicare Care Compare provider data (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.