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DR. NANCY EL-SHAMAA KADDIS M.D.
NPI 1053554949
Internal Medicine in Cambridge, MA

Active since April 08, 2009PECOS EnrolledAccepts Medicare Assignment
86.28/100
CMS Quality Rating
1575 CAMBRIDGE ST, DIVISION OF INTERNAL MEDICINE, CAMBRIDGE, MA 02138(866) 600-2273 Get Directions Write a Review

NPPES record last updated: August 21, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Nancy El-shamaa Kaddis M.d. NPPES

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

DR. NANCY EL-SHAMAA KADDIS M.D. (NPI 1053554949) is an individual internal medicine provider in Cambridge, Massachusetts, licensed in Massachusetts (252322) and active in the NPI registry since April 2009. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Michigan State University College Of Human Medicine (2009).

NPPES Registry Identity

NPI1053554949
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. NANCY EL-SHAMAA KADDISCredential: M.D.
Location Address1575 CAMBRIDGE ST, DIVISION OF INTERNAL MEDICINECambridge, MA 02138-4308
Mailing Address101 Columbian StSouth Weymouth, MA 02190-1601 · (616) 308-8856
Phone(866) 600-2273
Sole ProprietorYes
Medical School CMSMichigan State University College Of Human MedicineGraduated 2009
Enumeration DateApril 8, 2009
Last NPPES UpdateAugust 21, 2020
NPPES CertifiedAugust 21, 2020
✔ NPI 1053554949 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 · 252322
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.
1575 CAMBRIDGE ST, Cambridge, MA 02138
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Other Names 1

Former Name (1)Dr. Nancy Nabil El-shamaa

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Taro Health.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

Dr. Nancy El-shamaa Kaddis M.d. 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 ID3274846662
PECOS Enrollment IDI20150714001292
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 Nancy Kaddis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Dana-Farber Cancer Institute, Inc.
2.6 mi
General Acute Care Hospital
450 BROOKLINE AVE
Boston, MA 02215
  • Reassigned Medicare billing, Massachusetts enrollment
  • Also billed through NPI 1346433257 (Massachusetts)
  • 1,026 clinicians in this Medicare group
NPI 1851333686 (617) 632-3000

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 6

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.

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.
572 services389 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.
338 services166 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
66 services66 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.
44 services42 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.
15 services15 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
13 services13 patients

Hospital Affiliations CMS Care Compare 3

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

Massachusetts General Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220071
Location55 Fruit StreetBoston, MA 02114 · Suffolk County
Emergency services Birthing friendly

South Shore Hospital

Acute Care Hospitals · South Weymouth, MA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220100
Location55 Fogg RoadSouth Weymouth, MA 02190 · Norfolk County
Emergency services Birthing friendly

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 02138 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

86.28/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality69.36
Promoting Interoperability100
Improvement Activities40

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.

MS. NATALIE HUSMANN KEELER RN, BSN
Registered Nurse
1575 CAMBRIDGE ST
CAMBRIDGE, MA 02138
Middlesex County (617) 876-4344
MR. JOHN HORRAS MSW
Social Worker (Clinical)
1575 CAMBRIDGE ST
CAMBRIDGE, MA 02138
Middlesex County (617) 234-7787
EMILY GODDU NP
Nurse Practitioner
1575 CAMBRIDGE ST
CAMBRIDGE, MA 02138
Middlesex County (617) 876-4344
SPAULDING HOSPITAL-CAMBRIDGE, INC.
Long Term Care Hospital
1575 CAMBRIDGE ST
CAMBRIDGE, MA 02138
Middlesex County (617) 876-4344
JESSICA QIU DPT
Physical Therapist
1575 CAMBRIDGE ST
CAMBRIDGE, MA 02138
Middlesex County (617) 876-4344
MR. RICHARD P LAMBERT NP
Nurse Practitioner (Adult Health)
1575 CAMBRIDGE ST, YOUVILLE HOSPITAL
CAMBRIDGE, MA 02138
Middlesex County (617) 876-4344
MASSACHUSETTS GENERAL HOSPITAL
Long Term Care Hospital
1575 CAMBRIDGE ST
CAMBRIDGE, MA 02138
Middlesex County (617) 724-7168
CRISTINA SALABAO CRNP
Nurse Practitioner (Family)
1575 CAMBRIDGE ST
CAMBRIDGE, MA 02138
Middlesex County (617) 234-7315

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 Nancy Kaddis's NPI number?

The NPI number for Nancy Kaddis is 1053554949. It was assigned to this individual provider in the NPPES registry on April 8, 2009. The provider is also known as Dr. Nancy Nabil El-Shamaa.

Where is Nancy Kaddis located?

Nancy Kaddis practices at 1575 Cambridge St Division Of Internal Medicine, Cambridge, MA 02138. The listed phone number is (866) 600-2273.

What is Nancy Kaddis's specialty?

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

Is Nancy Kaddis enrolled in Medicare?

Yes. Nancy Kaddis 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 Nancy Kaddis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nancy Kaddis reassigns Medicare benefits to Dana-Farber Cancer Institute, Inc. (Boston, MA). 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 Nancy Kaddis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nancy Kaddis accept?

Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Nancy Kaddis 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.

Is Nancy Kaddis affiliated with any hospitals?

According to CMS data, Nancy Kaddis is affiliated with Massachusetts General Hospital, South Shore Hospital and Brigham And Women's Hospital.

When was this NPI record last updated?

The NPPES record for Nancy Kaddis was last updated on August 21, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.