MARGARET BARAN
NPI 1285623843
Internal Medicine in Darien, CT
About Margaret Baran NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET BARAN (NPI 1285623843) is an individual internal medicine provider in Darien, Connecticut, licensed in Connecticut (69231) and active in the NPI registry since October 2005. She is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (1997).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Margaret Baran 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 Margaret Baran reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stamford, CT 06907
- Reassigned Medicare billing, Connecticut enrollment
- 496 clinicians in this Medicare group
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 769 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 11
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06820 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
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 Margaret Baran's NPI number?
The NPI number for Margaret Baran is 1285623843. It was assigned to this individual provider in the NPPES registry on October 17, 2005.
Where is Margaret Baran located?
Margaret Baran practices at 1500 Post Rd Ste 100, Darien, CT 06820. The listed phone number is (203) 655-8749.
What is Margaret Baran's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Margaret Baran enrolled in Medicare?
Yes. Margaret Baran 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 Margaret Baran's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Baran reassigns Medicare benefits to 2 organizations: Stamford Health Medical Group Inc (Stamford, CT) and Icahn School Of Medicine At Mount Sinai (New York, NY). 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 Margaret Baran's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Baran accept?
Health plans from Anthem Blue Cross and Blue Shield list Margaret Baran 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 Margaret Baran was last updated on October 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Margaret Baran · NPI 1285623843
Internal Medicine physician in Darien, Connecticut. Individual provider, active in the CMS NPPES registry since October 17, 2005.
## Identity
- **NPI:** 1285623843 (Entity type: Individual)
- **Enumerated:** October 17, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 69231 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 POST RD STE 100, Darien, CT 06820-5936
- **Phone:** (203) 655-8749 · **Fax:** (203) 655-0701
## 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): Stamford Health Medical Group Inc (NPI 1154633980, Stamford, CT); Icahn School Of Medicine At Mount Sinai (NPI 1427493113, New York, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 1997
## Record status
- **NPPES last updated:** October 12, 2021
- **Other identifiers:** Medicaid 02094580 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1285623843) · Data from the CMS NPPES public registry.