MRS. SANDY TAN MSN, FNP
NPI 1659619708
Nurse Practitioner - Family in Sudbury, MA
About Mrs. Sandy Tan Msn, Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. SANDY TAN MSN, FNP (NPI 1659619708) is an individual family provider in Sudbury, Massachusetts, licensed in Massachusetts (RN277143) and active in the NPI registry since January 2013. She is enrolled in Medicare PECOS, is affiliated with Tufts Medical Center, and is a graduate of Other (2011).
NPPES Registry Identity
Specialties & Licenses 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
Mrs. Sandy Tan Msn, Fnp 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 Sandy Tan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02111
- Reassigned Medicare billing, Massachusetts enrollment
- 40 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 3
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Tufts Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01776 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 8
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 Sandy Tan's NPI number?
The NPI number for Sandy Tan is 1659619708. It was assigned to this individual provider in the NPPES registry on January 24, 2013.
Where is Sandy Tan located?
Sandy Tan practices at 501 Boston Post Rd, Sudbury, MA 01776. The listed phone number is (978) 443-7141.
What is Sandy Tan's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Sandy Tan enrolled in Medicare?
Yes. Sandy Tan 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 Sandy Tan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sandy Tan reassigns Medicare benefits to Pratt Neurology Associates, 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 Sandy Tan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sandy Tan accept?
Health plans from Taro Health list Sandy Tan 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 Sandy Tan affiliated with any hospitals?
According to CMS data, Sandy Tan is affiliated with Tufts Medical Center.
When was this NPI record last updated?
The NPPES record for Sandy Tan was last updated on January 26, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Mrs. Sandy Tan, MSN, FNP · NPI 1659619708
Family physician in Sudbury, Massachusetts. Individual provider, active in the CMS NPPES registry since January 24, 2013.
## Identity
- **NPI:** 1659619708 (Entity type: Individual)
- **Enumerated:** January 24, 2013
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** RN277143 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 501 BOSTON POST RD, Sudbury, MA 01776-3335
- **Phone:** (978) 443-7141
## 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:** Pratt Neurology Associates, Inc (NPI 1841237617, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** January 26, 2019
---
Source: [NPI Profile](https://npiprofile.com/npi/1659619708) · Data from the CMS NPPES public registry.