SARAH D HAESSLER MD
NPI 1356446140
Internal Medicine - Infectious Disease in Springfield, MA
About Sarah D Haessler Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SARAH D HAESSLER MD (NPI 1356446140) is an individual infectious disease provider in Springfield, Massachusetts, licensed in Massachusetts (224421) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, is affiliated with Baystate Medical Center, and maintains a secondary practice location in Springfield.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Sarah D Haessler 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 Reassignment
Medicare enrollment records show Sarah Haessler reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Springfield, MA 01199
- Reassigned Medicare billing, Massachusetts enrollment
- 1,537 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.
Baystate Medical Center
Acute Care Hospitals · Springfield, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01107 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.
SPRINGFIELD, MA 01107
SPRINGFIELD, MA 01107
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 Sarah Haessler's NPI number?
The NPI number for Sarah Haessler is 1356446140. It was assigned to this individual provider in the NPPES registry on September 14, 2006.
Where is Sarah Haessler located?
Sarah Haessler practices at 3300 Main St 3rd Floor Suite C&d, Springfield, MA 01107. The listed phone number is (413) 794-7394.
What is Sarah Haessler's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Sarah Haessler enrolled in Medicare?
Yes. Sarah Haessler 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 Sarah Haessler's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sarah Haessler reassigns Medicare benefits to Baystate Medical Practices, Inc (Springfield, 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 Sarah Haessler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sarah Haessler accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Sarah Haessler 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 Sarah Haessler affiliated with any hospitals?
According to CMS data, Sarah Haessler is affiliated with Baystate Medical Center.
When was this NPI record last updated?
The NPPES record for Sarah Haessler was last updated on January 5, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Sarah D Haessler, MD · NPI 1356446140
Infectious Disease physician in Springfield, Massachusetts. Individual provider, active in the CMS NPPES registry since September 14, 2006.
## Identity
- **NPI:** 1356446140 (Entity type: Individual)
- **Enumerated:** September 14, 2006
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 224421 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 3300 MAIN ST, 3RD FLOOR SUITE C&D, Springfield, MA 01107-1112
- **Phone:** (413) 794-7394 · **Fax:** (413) 794-7136
## 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:** Baystate Medical Practices, Inc (NPI 1548205909, Springfield, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** George Washington University School Of Medicine, class of 1999
## Record status
- **NPPES last updated:** January 5, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1356446140) · Data from the CMS NPPES public registry.