MUHAMMAD JANISAR M.D.
NPI 1972883197
Internal Medicine in Cambridge, MA
About Muhammad Janisar M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MUHAMMAD JANISAR M.D. (NPI 1972883197) is an individual internal medicine provider in Cambridge, Massachusetts, licensed in Massachusetts (257858) and active in the NPI registry since August 2011. He is enrolled in Medicare PECOS, is affiliated with Mount Auburn Hospital, and is a graduate of Other (2005).
NPPES Registry Identity
Specialties & Licenses
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
Muhammad Janisar 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 Reassignments
6Medicare enrollment records show Muhammad Janisar reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Cambridge, MA 02138
- Reassigned Medicare billing, Massachusetts enrollment
- 423 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 2,579 clinicians in this Medicare group
Winchester, MA 01890
- Reassigned Medicare billing, Massachusetts enrollment
- 101 clinicians in this Medicare group
Burlington, MA 01805
- Reassigned Medicare billing, Massachusetts enrollment
- 410 clinicians in this Medicare group
Burlington, MA 01805
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1063447316 (Massachusetts)
- 1,574 clinicians in this Medicare group
Concord, MA 01742
- Reassigned Medicare billing, Massachusetts enrollment
- 451 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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mount Auburn Hospital
Acute Care Hospitals · Cambridge, MANortheast Hospital Corporation
Acute Care Hospitals · Beverly, MAEmerson Hospital -
Acute Care Hospitals · W Concord, 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 02138 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.
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
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 Muhammad Janisar's NPI number?
The NPI number for Muhammad Janisar is 1972883197. It was assigned to this individual provider in the NPPES registry on August 18, 2011.
Where is Muhammad Janisar located?
Muhammad Janisar practices at 330 Mount Auburn St Department Of Medicine, Cambridge, MA 02138. The listed phone number is (617) 492-3500.
What is Muhammad Janisar's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Muhammad Janisar enrolled in Medicare?
Yes. Muhammad Janisar 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 Muhammad Janisar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Muhammad Janisar reassigns Medicare benefits to 6 organizations: Mount Auburn Professional Services Inc (Cambridge, MA), Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA), Winchester Lahey Inpatient Specialists PLLC (Winchester, MA), Beth Israel Lahey Health Primary Care, Inc. (Burlington, MA), Lahey Clinic, Inc. (Burlington, MA) and 1 more organization, listed in the Medicare section above. 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 Muhammad Janisar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Muhammad Janisar affiliated with any hospitals?
According to CMS data, Muhammad Janisar is affiliated with Mount Auburn Hospital, Northeast Hospital Corporation, Emerson Hospital -, Winchester Hospital and Lahey Hospital & Medical Center, Burlington.
When was this NPI record last updated?
The NPPES record for Muhammad Janisar was last updated on November 5, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Muhammad Janisar, M.D. · NPI 1972883197
Internal Medicine physician in Cambridge, Massachusetts. Individual provider, active in the CMS NPPES registry since August 18, 2011.
## Identity
- **NPI:** 1972883197 (Entity type: Individual)
- **Enumerated:** August 18, 2011
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 257858 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 330 MOUNT AUBURN ST, DEPARTMENT OF MEDICINE, Cambridge, MA 02138-5502
- **Phone:** (617) 492-3500
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Mount Auburn Professional Services Inc (NPI 1992750996, Cambridge, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1194765438, Boston, MA); Winchester Lahey Inpatient Specialists PLLC (NPI 1144770629, Winchester, MA); Beth Israel Lahey Health Primary Care, Inc. (NPI 1043710791, Burlington, MA); Lahey Clinic, Inc. (NPI 1538194980, Burlington, MA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** November 5, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1972883197) · Data from the CMS NPPES public registry.