DR. SASHA STEPHEN MD
NPI 1992097646
Dermatology in Boston, MA

Q: What is Sasha Stephen's NPI number?

The NPI number for Sasha Stephen is 1992097646. It was assigned to this individual provider in the NPPES registry on May 12, 2011. The provider is also known as Aleksandra Stephen MD.

Q: What is Sasha Stephen's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Q: When was this NPI record last updated?

The NPPES record for Sasha Stephen was last updated on June 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since May 12, 2011PECOS EnrolledAccepts Medicare Assignment

75 FRANCIS ST, BOSTON, MA 02115(617) 732-5500 Get Directions Write a Review

NPPES record last updated: June 11, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 19, 2022, Aug 23, 2019 (2 updates tracked since 2019).

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About Dr. Sasha Stephen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. SASHA STEPHEN MD (NPI 1992097646) is an individual dermatology provider in Boston, Massachusetts, licensed in Massachusetts (294725) and active in the NPI registry since May 2011. She is enrolled in Medicare PECOS, is affiliated with Brigham And Women's Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1992097646

Entity TypeIndividualFemale

Primary Taxonomy207N00000X

Provider Legal NameDR. SASHA STEPHENCredential: MD

Location Address75 FRANCIS STBoston, MA 02115-6110

Mailing Address75 Francis StBoston, MA 02115-6110 · (617) 732-5500

Phone(617) 732-5500

Sole ProprietorNo

Medical School CMSPerelman School Of Med At The University Of PennsylvaniaGraduated 2011

Enumeration DateMay 12, 2011

Last NPPES UpdateJune 11, 20262 updates tracked since enumeration

NPPES CertifiedJune 11, 2026

✔ NPI 1992097646 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians

Taxonomy Code207N00000X

Licenses✔ Licensed in MA · 294725✔ Licensed in CO · DR.0061520✔ Licensed in PA · MT199331

Definition

A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.

Also ListedInternal MedicineTaxonomy 207R00000X · License MT199331 (PA)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X · License MT199331 (PA)

75 FRANCIS ST, Boston, MA 02115

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Other Names 1

Former Name (1)Aleksandra Stephen Md

Secondary Practice Locations 3

Location 150 Staniford StBoston, MA 02114-2517 · Phone (617) 726-2914

Location 2221 Longwood AveBoston, MA 02115-5804 · Phone (617) 732-4918

Location 3100 Brigham WayWestwood, MA 02090-2442 · Phone (877) 937-8128

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

Dr. Sasha Stephen 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.

PECOS PAC ID3072812585

PECOS Enrollment IDI20221006003023

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Sasha Stephen reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Brigham & Womens Physicians Organization Inc

0.1 mi

Internal Medicine

75 FRANCIS ST
Boston, MA 02115

Reassigned Medicare billing, Massachusetts enrollment
4,574 clinicians in this Medicare group

NPI 1033535497 (617) 732-5500

Dana-Farber Cancer Institute, Inc.

0.2 mi

General Acute Care Hospital

450 BROOKLINE AVE
Boston, MA 02215

Reassigned Medicare billing, Massachusetts enrollment
1,026 clinicians in this Medicare group

NPI 1851333686 (617) 632-3000

The General Hospital Corporation

2.7 mi

General Acute Care Hospital

55 FRUIT ST, BULFINCH 360
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
6,234 clinicians in this Medicare group

NPI 1023049236 (617) 726-2000

Massachusetts General Physicians Organization Inc

2.7 mi

Dermatology

55 FRUIT ST, BUL 2
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
6,360 clinicians in this Medicare group

NPI 1801874573 (617) 724-0287

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 15

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.

Destruction of precancer skin growth, 2-14 growths 17003

This procedure involves removing 2-14 precancerous skin growths. The growths are treated to prevent them from potentially developing into skin cancer. The process is safe, with minimal discomfort, and promotes healthier skin.

883 services165 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

396 services305 patients

Destruction of precancer skin growth, 1 growth 17000

"Destruction of precancer skin growth" is a procedure that eliminates a single precancerous skin growth. This is done to prevent it from developing into skin cancer. The growth may be removed using various methods such as cryotherapy (freezing), laser therapy, or topical medications.

232 services197 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

184 services148 patients

Destruction of skin growth, 1-14 growths 17110

"Destruction of skin growth" refers to a procedure where 1-14 abnormal skin growths are removed. This is done using methods such as freezing, burning, or laser therapy. It helps prevent the growth from causing discomfort or turning into a more serious condition.

89 services76 patients

Biopsy of related skin growth, first growth 11102

A biopsy of a skin growth involves taking a small sample of the growth to examine it under a microscope. This helps determine if the growth is harmful. The procedure is typically quick, with minimal discomfort. It's a crucial step in ensuring your skin's health.

80 services65 patients

Destruction of precancer skin growth, 15 or more growths 17004

This procedure involves removing 15 or more precancerous skin growths to prevent them from developing into cancer. It's done using various methods like freezing, creams, or minor surgery. The goal is to protect your health by stopping cancer before it starts.

72 services52 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

37 services28 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

33 services33 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

33 services30 patients

Biopsy of related skin growth, each additional growth 11103

A biopsy of related skin growth is a procedure where a small piece of skin growth is removed for testing. If additional growths are identified, they may also be biopsied. This helps in diagnosing skin conditions and planning appropriate treatment.

18 services12 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

17 services17 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

16 services16 patients

Destruction of precancer skin growth, 1 growth 17000

13 services12 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

13 services13 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220110

Location75 Francis StreetBoston, MA 02115 · Suffolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02115 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$97.64 typical visit price

range $63.72 – $189.86

Typical copayment $24.41 (range $15.93 – $47.46)

Most-billed visit code 99203

Established Patient

$78.84 typical visit price

range $21.07 – $155.29

Typical copayment $19.71 (range $5.26 – $38.82)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

RUMA RAJBHANDARI

Internal Medicine (Gastroenterology)

75 FRANCIS ST
BOSTON, MA 02115

Suffolk County (617) 525-6841

WENYA LINDA BI

Neurological Surgery

75 FRANCIS ST
BOSTON, MA 02115

Suffolk County (203) 645-9485

CHI YUEN CHAN M.D.

Student in an Organized Health Care Education/Training Program

75 FRANCIS ST
BOSTON, MA 02115

Suffolk County (617) 732-5500

JENNIFER MICHELLE THOMAS MD

Radiology (Diagnostic Radiology)

75 FRANCIS ST, DEPARTMENT OF RADIOLOGY
BOSTON, MA 02115

Suffolk County (617) 732-6248

GAURAV SHARMA M.D.

Surgery (Vascular Surgery)

75 FRANCIS ST, BRIGHAM AND WOMEN'S HOSPITAL
BOSTON, MA 02115

Suffolk County (951) 259-0890

YEU-SHIN CINDY CHANG M.D., M.P.H.

Emergency Medicine

75 FRANCIS ST, BWH DEPT. OF EMERGENCY MEDICINE
BOSTON, MA 02115

Suffolk County (617) 732-8070

CARA L RICHARDS

Physician Assistant

75 FRANCIS ST
BOSTON, MA 02115

Suffolk County (617) 732-5500

LARA COAKLEY

Nurse Practitioner (Family)

75 FRANCIS ST
BOSTON, MA 02115

Suffolk County (617) 732-5500

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 Sasha Stephen's NPI number?

The NPI number for Sasha Stephen is 1992097646. It was assigned to this individual provider in the NPPES registry on May 12, 2011. The provider is also known as Aleksandra Stephen MD.

Where is Sasha Stephen located?

Sasha Stephen practices at 75 Francis St, Boston, MA 02115. The listed phone number is (617) 732-5500.

What is Sasha Stephen's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is Sasha Stephen enrolled in Medicare?

Yes. Sasha Stephen 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 Sasha Stephen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sasha Stephen reassigns Medicare benefits to 4 organizations: Brigham & Womens Physicians Organization Inc (Boston, MA), Dana-Farber Cancer Institute, Inc. (Boston, MA), The General Hospital Corporation (Boston, MA) and Massachusetts General Physicians Organization Inc (Boston, 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 Sasha Stephen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Sasha Stephen affiliated with any hospitals?

According to CMS data, Sasha Stephen is affiliated with Brigham And Women's Hospital.

When was this NPI record last updated?

The NPPES record for Sasha Stephen was last updated on June 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.