Dr. Margaret Stewart M.D.
About this NPIWhat this record shows.
NPI 1649375072 is registered to Dr. Margaret Stewart M.D., a Dermatology practising at 155 Borthwick Ave, Suite 201 West in Portsmouth, New Hampshire. Dermatology is a medical specialty focused on conditions affecting the skin, hair, and nails, including acne, eczema, psoriasis, skin cancer screenings, and cosmetic procedures. Dr. Margaret Stewart M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Your brand here.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Other
- J19743MA· Issued by BCBS MASSACHUSETTS
- P00366953NH· Issued by RAILROAD MEDICARE
- 403898MA· Issued by TUFTS
- 01Y004640NH01NH· Issued by ANTHEM NEW HAMPSHIRE
- 2457634MA· Issued by AETNA
- 022071ME· Issued by ANTHEM MAINE
- 401347MA· Issued by HARVARD
- P00126157MA· Issued by RAILROAD MEDICARE
Source: NPPES public registry.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Dr. Margaret Stewart M.D. accepts. To confirm in-network status with your specific health plan, contact Dr. Margaret Stewart M.D. directly at (603) 433-9575.
Frequently asked
Yes. NPI 1649375072 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Dermatology is a medical specialty focused on conditions affecting the skin, hair, and nails, including acne, eczema, psoriasis, skin cancer screenings, and cosmetic procedures.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (603) 433-9575.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Dr. Margaret Stewart M.D. is a Type-1 individual NPI.