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DR. FERNAN F. DE GUZMAN M.D.
NPI 1669434254
Specialist in Tamuning, GU

Active since April 06, 2006PECOS EnrolledAccepts Medicare Assignment
100/100
CMS Quality Rating
548 SOUTH MARINE CORPS DRIVE, TAMUNING, GU 96913(671) 646-5824(671) 647-3546 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Fernan F. De Guzman M.d. NPPES

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

DR. FERNAN F. DE GUZMAN M.D. (NPI 1669434254) is an individual specialist in Tamuning, Guam and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS, is affiliated with Guam Memorial Hospital Authority, and is a graduate of Other (1990).

NPPES Registry Identity

NPI1669434254
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameDR. FERNAN F. DE GUZMANCredential: M.D.
Location Address548 SOUTH MARINE CORPS DRIVETamuning, GU 96913
Mailing AddressPo Box 6578Tamuning, GU 96931-6578 · (671) 646-6956 · Fax (671) 647-3546
Phone(671) 646-5824
Fax(671) 647-3546
Sole ProprietorNo
Medical School CMSOtherGraduated 1990
Enumeration DateApril 6, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1669434254 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

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. Fernan F. De Guzman 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 ID3971590761
PECOS Enrollment IDI20170905003116
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

2

Medicare enrollment records show Fernan De Guzman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Guam Memorial Hospital
General Acute Care Hospital
850 GOVERNOR CARLOS CAMACHO ROAD
Oka Tamuning, GU 96913
  • Reassigned Medicare billing, Guam enrollment
  • 320 clinicians in this Medicare group
NPI 1366519027 (671) 647-2937
Hafa Specialist Group LLP
Specialist
280 PALE SAN VITORES RD
Tamuning, GU 96913
  • Reassigned Medicare billing, Guam enrollment
  • 20 clinicians in this Medicare group
NPI 1235141060 (671) 647-4542

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

Hospital Affiliations CMS Care Compare

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

Guam Memorial Hospital Authority

Acute Care Hospitals · Tamuning, GU
2/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number650001
Location85O Gov Carlos G Camacho RoadTamuning, GU 96913 · Guam County
Emergency services

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.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality92.62
Improvement Activities40
Cost100

Other Providers at the Same Location NPPES 15

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. DENNIS ANTONIO A SARMIENTO M.D.
Pediatrics
548 SOUTH MARINE CORPS DRIVE
TAMUNING, GU 96913
Guam (671) 646-5825
MR. WALTER EDWARD STRATTON PA-C
Physician Assistant
548 SOUTH MARINE CORPS DRIVE
TAMUNING, GU 96913
Guam (671) 646-5824
DR. DAVID MICHAEL MUDD M.D.
Radiologic Technologist (Radiography)
548 SOUTH MARINE CORPS DRIVE
TAMUNING, GU 96913
Guam (671) 646-5824
DR. MARIA EDNA VILLACORTA SANTOS M.D.
Specialist
548 SOUTH MARINE CORPS DRIVE
TAMUNING, GU 96913
Guam (671) 646-5824
MRS. CATHLEEN A. DISTOR CNM
Advanced Practice Midwife
548 SOUTH MARINE CORPS DRIVE
TAMUNING, GU 96913
Guam (671) 646-5824
MR. JAY JOSEPH MCDONALD O.D.
Optometrist
548 SOUTH MARINE CORPS DRIVE
TAMUNING, GU 96913
Guam (671) 646-5824
DR. JAMES GREGORY FLEMING M.D.
Specialist
548 SOUTH MARINE CORPS DRIVE
TAMUNING, GU 96913
Guam (671) 646-5824
TAKECARE INSURANCE COMPANY, INC.
Pharmacist
548 SOUTH MARINE CORPS DRIVE
TAMUNING, GU 96913
Guam (671) 646-5824

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 Fernan De Guzman's NPI number?

The NPI number for Fernan De Guzman is 1669434254. It was assigned to this individual provider in the NPPES registry on April 6, 2006.

Where is Fernan De Guzman located?

Fernan De Guzman practices at 548 South Marine Corps Drive, Tamuning, GU 96913. The listed phone number is (671) 646-5824.

What is Fernan De Guzman's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Fernan De Guzman enrolled in Medicare?

Yes. Fernan 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.

Which organizations bill Medicare for Fernan De Guzman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Fernan De Guzman reassigns Medicare benefits to 2 organizations: Guam Memorial Hospital (Oka Tamuning, GU) and Hafa Specialist Group LLP (Tamuning, GU). 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 Fernan De Guzman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Fernan De Guzman affiliated with any hospitals?

According to CMS data, Fernan De Guzman is affiliated with Guam Memorial Hospital Authority.

When was this NPI record last updated?

The NPPES record for Fernan De Guzman was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.