MIRIAM LILLA ORNSTEIN M.D.
NPI 1104873892
Psychiatry & Neurology - Psychiatry in Cambridge, MA
About Miriam Lilla Ornstein M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MIRIAM LILLA ORNSTEIN M.D. (NPI 1104873892) is an individual psychiatry provider in Cambridge, Massachusetts, licensed in Massachusetts (73547) and active in the NPI registry since May 2006. She has opted out of Medicare through June 25, 2027 and remains eligible to order and refer.
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Opted out of Medicare
Miriam Lilla Ornstein M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from June 25, 2021 through June 25, 2027.
Physician 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.
Other Providers at the Same Location NPPES 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CAMBRIDGE, MA 02139
CAMBRIDGE, MA 02139
CAMBRIDGE, MA 02139
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 Miriam Lilla Ornstein's NPI number?
The NPI number for Miriam Lilla Ornstein is 1104873892. It was assigned to this individual provider in the NPPES registry on May 28, 2006.
Where is Miriam Lilla Ornstein located?
Miriam Lilla Ornstein practices at 6 Bigelow St Suite #101, Cambridge, MA 02139. The listed phone number is (617) 441-8750.
What is Miriam Lilla Ornstein's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Miriam Lilla Ornstein enrolled in Medicare?
No. Miriam Lilla Ornstein has opted out of Medicare through June 25, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.
What insurance does Miriam Lilla Ornstein accept?
Health plans from Anthem Blue Cross and Blue Shield list Miriam Lilla Ornstein 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.
When was this NPI record last updated?
The NPPES record for Miriam Lilla Ornstein was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 days 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.
# Miriam Lilla Ornstein, M.D. · NPI 1104873892
Psychiatry physician in Cambridge, Massachusetts. Individual provider, active in the CMS NPPES registry since May 28, 2006.
## Identity
- **NPI:** 1104873892 (Entity type: Individual)
- **Enumerated:** May 28, 2006
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 73547 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 6 BIGELOW ST, SUITE #101, Cambridge, MA 02139-2384
- **Phone:** (617) 441-8750
## Medicare
- **Medicare:** Opted out of Medicare (opt-out affidavit on file, in effect through June 25, 2027); services are provided under private contract
## Record status
- **NPPES last updated:** July 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1104873892) · Data from the CMS NPPES public registry.