ALEXANDER T. YU MD
NPI 1780946285
Internal Medicine in Boston, MA

Q: What is Alexander Yu's NPI number?

The NPI number for Alexander Yu is 1780946285. It was assigned to this individual provider in the NPPES registry on June 11, 2012.

Q: What is Alexander Yu's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Alexander Yu was last updated on June 11, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.

Active since June 11, 2012PECOS EnrolledAccepts Medicare Assignment

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST., BOSTON, MA 02114(617) 726-2865 Get Directions Write a Review

NPPES record last updated: June 11, 2012. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Alexander T. Yu Md NPPES

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

ALEXANDER T. YU MD (NPI 1780946285) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (L-252853) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS and is a graduate of Texas Tech University Health Science Center School Of Medicine (2012).

NPPES Registry Identity

NPI1780946285

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameALEXANDER T. YUCredential: MD

Location AddressMASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.Boston, MA 02114

Mailing AddressMassachusetts General Hospital, 55 Fruit St.Boston, MA 02114 · (617) 726-2865

Phone(617) 726-2865

Sole ProprietorNo

Medical School CMSTexas Tech University Health Science Center School Of MedicineGraduated 2012

Enumeration DateJune 11, 2012

✔ NPI 1780946285 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in MA · L-252853

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

MASSACHUSETTS GENERAL HOSPITAL, Boston, MA 02114

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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

Alexander T. Yu 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 ID5991932188

PECOS Enrollment IDI20170407001093

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 Reassignment

Medicare enrollment records show Alexander Yu reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

San Mateo County

2,693 mi

Community/Behavioral Health

2415 UNIVERSITY AVE STE 301
East Palo Alto, CA 94303

Reassigned Medicare billing, California enrollment
Medicare enrollment name: County Of San Mateo
Also billed through NPI 1306907928 (California), NPI 1831268580 (California)
597 clinicians in this Medicare group

NPI 1710086301 (650) 363-4030

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 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

$144.11 typical visit price

range $63.72 – $189.86

Typical copayment $36.02 (range $15.93 – $47.46)

Most-billed visit code 99204

Established Patient

$111.18 typical visit price

range $21.07 – $155.29

Typical copayment $27.79 (range $5.26 – $38.82)

Most-billed visit code 99214

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.

KAITLYN MY-TU LAM MBBS

Internal Medicine (Cardiovascular Disease)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 724-7738

ALAKA RAY M.D.

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2066

MEGHAN E SISE M.D.

Internal Medicine (Nephrology)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2862

HUGH G AUCHINCLOSS M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2000

ANGELA M. JACQUES MD

Pediatrics

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 726-2066

NICOLE J LOOK-HONG MD, MSC

Surgery (Surgical Oncology)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 724-3868

CORINNA M ELLIOTT MA

Student in an Organized Health Care Education/Training Program

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 724-5600

KIRAN J AGARWAL-HARDING MD

Orthopaedic Surgery

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 726-2942

ADELINE GOSS MD

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 643-0596

KENDRICK M SHAW MD, PHD

Anesthesiology

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 726-3030

JOSHUA M SIEWERT MD,MBA

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 643-0596

CRISTINA CUSIN MD

Psychiatry & Neurology (Psychiatry)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2066

PARSIA A VAGEFI MD

Surgery

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2066

ANNE HODGES LIGHT MD

Pediatrics

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2066

DR. HILLARY R. KELLY MD

Radiology (Diagnostic Radiology)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET, GRB-273A
BOSTON, MA 02114

Suffolk County (617) 726-8320

GARRETT M CHINN M.D.

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2862

RUTH A DELANEY MD

Orthopaedic Surgery

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2800

KELLY E IRWIN M.D.

Psychiatry & Neurology (Psychiatry)

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET
BOSTON, MA 02114

Suffolk County (617) 726-2000

SHIRI B FEINGOLD M.D.

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 726-2865

NILAY K PATEL MD

Internal Medicine

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST.
BOSTON, MA 02114

Suffolk County (617) 726-2865

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 Alexander Yu's NPI number?

The NPI number for Alexander Yu is 1780946285. It was assigned to this individual provider in the NPPES registry on June 11, 2012.

Where is Alexander Yu located?

Alexander Yu practices at Massachusetts General Hospital 55 Fruit St., Boston, MA 02114. The listed phone number is (617) 726-2865.

What is Alexander Yu's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Alexander Yu enrolled in Medicare?

Yes. Alexander Yu 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 organization bills Medicare for Alexander Yu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Yu reassigns Medicare benefits to San Mateo County (East Palo Alto, CA). The 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 Alexander Yu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Alexander Yu was last updated on June 11, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.