HARALD C. OTT MD
NPI 1295862639
Surgery in Boston, MA

Q: What is Harald Ott's NPI number?

The NPI number for Harald Ott is 1295862639. It was assigned to this individual provider in the NPPES registry on February 27, 2007.

Q: What is Harald Ott's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Harald Ott was last updated on September 25, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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 February 27, 2007PECOS Enrolled

MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET, BOSTON, MA 02114(617) 726-2066 Get Directions Write a Review

NPPES record last updated: September 25, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Harald C. Ott Md NPPES

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

HARALD C. OTT MD (NPI 1295862639) is an individual surgery provider in Boston, Massachusetts, licensed in Massachusetts (L-228287) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1295862639

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameHARALD C. OTTCredential: MD

Location AddressMASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREETBoston, MA 02114

Mailing AddressMassachusetts General Hospital, 55 Fruit StreetBoston, MA 02114 · (617) 726-2066

Phone(617) 726-2066

Sole ProprietorNo

Enumeration DateFebruary 27, 2007

Last NPPES UpdateSeptember 25, 2019

✔ NPI 1295862639 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in MA · L-228287

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Also ListedThoracic Surgery (Cardiothoracic Vascular Surgery)Taxonomy 208G00000X · License 19829 (NH)

MASSACHUSETTS GENERAL HOSPITAL, Boston, MA 02114

Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Harald C. Ott Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Harald Ott reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The General Hospital Corporation

Same address

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

Same address

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.

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

$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.

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 Harald Ott's NPI number?

The NPI number for Harald Ott is 1295862639. It was assigned to this individual provider in the NPPES registry on February 27, 2007.

Where is Harald Ott located?

Harald Ott practices at Massachusetts General Hospital 55 Fruit Street, Boston, MA 02114. The listed phone number is (617) 726-2066.

What is Harald Ott's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Harald Ott enrolled in Medicare?

Yes. Harald Ott is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Harald Ott's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Harald Ott reassigns Medicare benefits to 2 organizations: 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 Harald Ott'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 Harald Ott was last updated on September 25, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.