MARY LYNETTE STEIN M.D.
NPI 1699067025
Anesthesiology - Pediatric Anesthesiology in Palo Alto, CA
About Mary Lynette Stein M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY LYNETTE STEIN M.D. (NPI 1699067025) is an individual pediatric anesthesiology provider in Palo Alto, California, licensed in Massachusetts (266827) and active in the NPI registry since May 2011. She is enrolled in Medicare PECOS, is affiliated with Boston Children's Hospital, and is a graduate of Stanford University School Of Medicine (2011).
NPPES Registry Identity
Specialties & Licenses
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
Mary Lynette Stein M.d. 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 Reassignment
Medicare enrollment records show Mary Stein reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 256 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Boston Children's Hospital
Childrens · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94304 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.
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 Mary Stein's NPI number?
The NPI number for Mary Stein is 1699067025. It was assigned to this individual provider in the NPPES registry on May 4, 2011.
Where is Mary Stein located?
Mary Stein practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.
What is Mary Stein's specialty?
The primary specialty registered for this NPI is Anesthesiology, specializing in Pediatric Anesthesiology, with taxonomy code 207LP3000X.
Is Mary Stein enrolled in Medicare?
Yes. Mary Stein 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 organization bills Medicare for Mary Stein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Stein reassigns Medicare benefits to Chmc Anesthesia Foundation Inc (Boston, MA). The 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 Mary Stein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Stein accept?
Health plans from Taro Health list Mary Stein 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.
Is Mary Stein affiliated with any hospitals?
According to CMS data, Mary Stein is affiliated with Boston Children's Hospital.
When was this NPI record last updated?
The NPPES record for Mary Stein was last updated on August 2, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Mary Lynette Stein, M.D. · NPI 1699067025
Pediatric Anesthesiology physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since May 4, 2011.
## Identity
- **NPI:** 1699067025 (Entity type: Individual)
- **Enumerated:** May 4, 2011
- **Primary specialty:** Anesthesiology - Pediatric Anesthesiology · taxonomy 207LP3000X
- **State license:** 266827 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304-1601
- **Phone:** (650) 497-8000
## 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:** Chmc Anesthesia Foundation Inc (NPI 1831268754, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Stanford University School Of Medicine, class of 2011
## Record status
- **NPPES last updated:** August 2, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1699067025) · Data from the CMS NPPES public registry.