REBECCA LAUREN LACH MD, MPH
NPI 1679137780
Family Medicine in Wellesley, MA
About Rebecca Lauren Lach Md, Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
REBECCA LAUREN LACH MD, MPH (NPI 1679137780) is an individual family medicine provider in Wellesley, Massachusetts, licensed in California (A177922) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS, is affiliated with Newton-wellesley Hospital, and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses 3
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
Rebecca Lauren Lach Md, Mph 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
5Medicare enrollment records show Rebecca Lach reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Newton, MA 02462
- Reassigned Medicare billing, Massachusetts enrollment
- 992 clinicians in this Medicare group
Julian, CA 92036
- Reassigned Medicare billing, California enrollment
- 577 clinicians in this Medicare group
El Cajon, CA 92020
- Reassigned Medicare billing, California enrollment
- 1,100 clinicians in this Medicare group
San Diego, CA 92111
- Reassigned Medicare billing, California enrollment
- 1,233 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 526 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Newton-Wellesley Hospital
Acute Care Hospitals · Newton, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02482 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WELLESLEY, MA 02482
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 Rebecca Lach's NPI number?
The NPI number for Rebecca Lach is 1679137780. It was assigned to this individual provider in the NPPES registry on April 24, 2019.
Where is Rebecca Lach located?
Rebecca Lach practices at 978 Worcester St, Wellesley, MA 02482. The listed phone number is (617) 219-1280.
What is Rebecca Lach's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Rebecca Lach enrolled in Medicare?
Yes. Rebecca Lach 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 Rebecca Lach's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Rebecca Lach reassigns Medicare benefits to 5 organizations: Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA), Centro De Salud De La Comunidad De San Ysidro, Inc. (Julian, CA), Family Health Centers Of San Diego, Inc. (El Cajon, CA), Sharp Rees-Stealy Medical Group, Inc (San Diego, CA) and Regents Of The University Of California (San Diego, CA). 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 Rebecca Lach's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Rebecca Lach accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Rebecca Lach 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 Rebecca Lach affiliated with any hospitals?
According to CMS data, Rebecca Lach is affiliated with Newton-Wellesley Hospital and Brigham And Women's Hospital.
When was this NPI record last updated?
The NPPES record for Rebecca Lach was last updated on March 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.
# Rebecca Lauren Lach, MD, MPH · NPI 1679137780
Family Medicine physician in Wellesley, Massachusetts. Individual provider, active in the CMS NPPES registry since April 24, 2019.
## Identity
- **NPI:** 1679137780 (Entity type: Individual)
- **Enumerated:** April 24, 2019
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A177922 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 978 WORCESTER ST, Wellesley, MA 02482-3709
- **Phone:** (617) 219-1280
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Mass General Brigham Medical Group Suburban Massachusetts Inc (NPI 1538191218, Newton, MA); Centro De Salud De La Comunidad De San Ysidro, Inc. (NPI 1730893777, Julian, CA); Family Health Centers Of San Diego, Inc. (NPI 1932561198, El Cajon, CA); Sharp Rees-Stealy Medical Group, Inc (NPI 1285616177, San Diego, CA); Regents Of The University Of California (NPI 1003934803, San Diego, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** March 10, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1679137780) · Data from the CMS NPPES public registry.