MICHELLE RULLAN JOHNSON MD
NPI 1114285905
Internal Medicine - Geriatric Medicine in Cambridge, MA
About Michelle Rullan Johnson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHELLE RULLAN JOHNSON MD (NPI 1114285905) is an individual geriatric medicine provider in Cambridge, Massachusetts, licensed in Massachusetts (265139) and active in the NPI registry since April 2012. She is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Medical Center, and is a graduate of New York University School Of Medicine (2012).
NPPES Registry Identity
Specialties & Licenses 4
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
Michelle Rullan Johnson 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
2Medicare enrollment records show Michelle Johnson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Cambridge, MA 02139
- Reassigned Medicare billing, Massachusetts enrollment
- 719 clinicians in this Medicare group
Lynnfield, MA 01940
- Reassigned Medicare billing, Massachusetts enrollment
- 410 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 6
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beth Israel Deaconess Medical Center
Acute Care Hospitals · Boston, MAWinchester Hospital
Acute Care Hospitals · Winchester, MALahey Hospital & Medical Center, Burlington
Acute Care Hospitals · Burlington, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02139 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.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 Michelle Johnson's NPI number?
The NPI number for Michelle Johnson is 1114285905. It was assigned to this individual provider in the NPPES registry on April 30, 2012.
Where is Michelle Johnson located?
Michelle Johnson practices at 119 Windsor St, Cambridge, MA 02139. The listed phone number is (617) 665-3600.
What is Michelle Johnson's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.
Is Michelle Johnson enrolled in Medicare?
Yes. Michelle Johnson 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 Michelle Johnson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michelle Johnson reassigns Medicare benefits to 2 organizations: Cambridge Public Health Commission (Cambridge, MA) and Beth Israel Lahey Health Primary Care, Inc. (Lynnfield, MA). 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 Michelle Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michelle Johnson accept?
Health plans from Anthem Blue Cross and Blue Shield list Michelle Johnson 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 Michelle Johnson affiliated with any hospitals?
According to CMS data, Michelle Johnson is affiliated with Beth Israel Deaconess Medical Center, Winchester Hospital and Lahey Hospital & Medical Center, Burlington.
When was this NPI record last updated?
The NPPES record for Michelle Johnson was last updated on December 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Michelle Rullan Johnson, MD · NPI 1114285905
Geriatric Medicine physician in Cambridge, Massachusetts. Individual provider, active in the CMS NPPES registry since April 30, 2012.
## Identity
- **NPI:** 1114285905 (Entity type: Individual)
- **Enumerated:** April 30, 2012
- **Primary specialty:** Internal Medicine - Geriatric Medicine · taxonomy 207RG0300X
- **State license:** 265139 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 119 WINDSOR ST, Cambridge, MA 02139-3647
- **Phone:** (617) 665-3600
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Cambridge Public Health Commission (NPI 1487603585, Cambridge, MA); Beth Israel Lahey Health Primary Care, Inc. (NPI 1922505072, Lynnfield, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York University School Of Medicine, class of 2012
## Record status
- **NPPES last updated:** December 19, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1114285905) · Data from the CMS NPPES public registry.