CHARLES DE GUZMAN MD
NPI 1134878705
Internal Medicine in Boston, MA

Q: What is Charles De Guzman's NPI number?

The NPI number for Charles De Guzman is 1134878705. It was assigned to this individual provider in the NPPES registry on March 21, 2022.

Q: What is Charles De Guzman'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 Charles De Guzman was last updated on March 20, 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 March 21, 2022PECOS EnrolledAccepts Medicare Assignment

55 FRUIT ST, BOSTON, MA 02114(617) 724-3874 Get Directions Write a Review

NPPES record last updated: March 20, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 20, 2026, May 27, 2025 (2 updates tracked since 2025).

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About Charles De Guzman Md NPPES

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

CHARLES DE GUZMAN MD (NPI 1134878705) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (1022888) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, is affiliated with Cambridge Health Alliance, and maintains a secondary practice location in Cambridge.

NPPES Registry Identity

NPI1134878705

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameCHARLES DE GUZMANCredential: MD

Location Address55 FRUIT STBoston, MA 02114-2621

Mailing Address1493 Cambridge StCambridge, MA 02139-1047 · (617) 665-1000

Phone(617) 724-3874

Sole ProprietorNo

Medical School CMSLoma Linda University School Of MedicineGraduated 2022

Enumeration DateMarch 21, 2022

Last NPPES UpdateMarch 20, 20262 updates tracked since enumeration

NPPES CertifiedMarch 20, 2026

✔ NPI 1134878705 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in MA · 1022888

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.

Also ListedHospitalistTaxonomy 208M00000X · License 1022888 (MA)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

55 FRUIT ST, Boston, MA 02114

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Secondary Practice Location 1

Location 11493 Cambridge StCambridge, MA 02139-1047 · Phone (617) 665-1000

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Charles De Guzman 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 ID1355724089

PECOS Enrollment IDI20250527000204

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.

Hospital Affiliations CMS Care Compare

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

Cambridge Health Alliance

Acute Care Hospitals · Cambridge, MA

3/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number220011

Location1493 Cambridge StreetCambridge, MA 02138 · Middlesex County

Emergency services Birthing friendly

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.

STUTI GIRISH SHROFF MD, MBBS

Pathology (Anatomic Pathology)

55 FRUIT ST
BOSTON, MA 02114

Suffolk County (617) 726-2971

NANCY WANG M.D.

Internal Medicine (Hematology & Oncology)

55 FRUIT ST
BOSTON, MA 02114

Suffolk County (017) 724-4000

DR. DUSAN HANIDZIAR M.D., PH.D.

Anesthesiology

55 FRUIT ST, GRAY-BIGELOW 444
BOSTON, MA 02114

Suffolk County (617) 726-3030

JOHN JOSEPH DANKO DO

Physical Medicine & Rehabilitation

55 FRUIT ST
BOSTON, MA 02114

Suffolk County (617) 726-2000

DR. MICHAEL ANDREW LOBRITZ M.D, PH.D.

Internal Medicine (Infectious Disease)

55 FRUIT ST, DIVISION OF INFECTIOUS DISEASE, GRJ-504
BOSTON, MA 02114

Suffolk County (617) 724-9248

MS. KELLY ELISHA TRECARTIN NP

Nurse Practitioner (Acute Care)

55 FRUIT ST, BIGALOW 852 F
BOSTON, MA 02114

Suffolk County (617) 726-7400

JAMIE MARIE ALLEN NP

Nurse Practitioner

55 FRUIT ST
BOSTON, MA 02114

Suffolk County (617) 724-4410

DR. DHAVAL SANJEEV KOLTE M.B.B.S., PH.D.

Internal Medicine (Cardiovascular Disease)

55 FRUIT ST
BOSTON, MA 02114

Suffolk County (617) 643-3238

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 Charles De Guzman's NPI number?

The NPI number for Charles De Guzman is 1134878705. It was assigned to this individual provider in the NPPES registry on March 21, 2022.

Where is Charles De Guzman located?

Charles De Guzman practices at 55 Fruit St, Boston, MA 02114. The listed phone number is (617) 724-3874.

What is Charles De Guzman's specialty?

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

Is Charles De Guzman enrolled in Medicare?

Yes. Charles De Guzman 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.

Is Charles De Guzman affiliated with any hospitals?

According to CMS data, Charles De Guzman is affiliated with Cambridge Health Alliance.

When was this NPI record last updated?

The NPPES record for Charles De Guzman was last updated on March 20, 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.