LAUREN SUE GROSSMAN MD
NPI 1891771168
Emergency Medicine in Mountain View, CA
About Lauren Sue Grossman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LAUREN SUE GROSSMAN MD (NPI 1891771168) is an individual emergency medicine provider in Mountain View, California, licensed in California (G152577) and active in the NPI registry since December 2005. She is enrolled in Medicare PECOS, maintains a secondary practice location in Stanford, and is a graduate of Other (1990).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Lauren Sue Grossman Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Lauren Grossman reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- 4,479 clinicians in this Medicare group
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 clinicians in this Medicare group
Loveland, CO 80538
- Reassigned Medicare billing, Colorado enrollment
- 2,596 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 9
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94040 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MOUNTAIN VIEW, CA 94040
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Lauren Grossman's NPI number?
The NPI number for Lauren Grossman is 1891771168. It was assigned to this individual provider in the NPPES registry on December 19, 2005.
Where is Lauren Grossman located?
Lauren Grossman practices at 701 E El Camino Real, Mountain View, CA 94040. The listed phone number is (650) 934-7800.
What is Lauren Grossman's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Lauren Grossman enrolled in Medicare?
Yes. Lauren Grossman is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Lauren Grossman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lauren Grossman reassigns Medicare benefits to 3 organizations: Sutter Bay Medical Foundation (Palo Alto, CA), Stanford Health Care (Stanford, CA) and Poudre Valley Medical Group, LLC (Loveland, CO). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lauren Grossman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lauren Grossman accept?
Health plans from Select Health list Lauren Grossman as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Lauren Grossman was last updated on July 10, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Lauren Sue Grossman, MD · NPI 1891771168
Emergency Medicine physician in Mountain View, California. Individual provider, active in the CMS NPPES registry since December 19, 2005.
## Identity
- **NPI:** 1891771168 (Entity type: Individual)
- **Enumerated:** December 19, 2005
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** G152577 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 701 E EL CAMINO REAL, Mountain View, CA 94040-2833
- **Phone:** (650) 934-7800 · **Fax:** (650) 934-7843
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA); Stanford Health Care (NPI 1437292927, Stanford, CA); Poudre Valley Medical Group, LLC (NPI 1225356868, Loveland, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1990
## Record status
- **NPPES last updated:** July 10, 2024
- **Other identifiers:** Other G152577 (CA); Medicaid 66057337 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1891771168) · Data from the CMS NPPES public registry.