DR. MERVIN DE GUZMAN DIAZ MD
NPI 1548876121
General Practice in Humacao, PR

Active since September 19, 2020PECOS EnrolledAccepts Medicare Assignment
355 CALLE FONT MARTELO, HUMACAO, PR 00791(787) 852-0768 Get Directions Write a Review

NPPES record last updated: May 24, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: May 24, 2026, Sep 11, 2025, Jun 27, 2024 and 3 more (6 updates tracked since 2020).

  • Individual
  • Male
  • Years of Experience 7
  • General Practice
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About MERVIN DE GUZMAN DIAZ

This page provides the complete NPI Profile along with additional information for Mervin De Guzman Diaz, a primary care provider established in Humacao, Puerto Rico with a medical specialization in General Practice and more than 7 years of experience. The healthcare provider is registered in the NPI registry with number 1548876121 assigned on September 2020. The practitioner's primary taxonomy code is 208D00000X with license number 24685 (PR). The provider is registered as an individual and his NPI record was last updated May 2026.

NPI
1548876121 Verify this NPI
Provider Name
DR. MERVIN DE GUZMAN DIAZ MD
Gender
Male
Entity Type
Individual
Location Address
355 CALLE FONT MARTELO HUMACAO, PR 00791
Location Phone
(787) 852-0768
Mailing Address
PO BOX 59 FAJARDO, PR 00738
Mailing Phone
(787) 718-2715
Medical School Name
OTHER
Graduation Year
2020
Is Sole Proprietor?
Yes
Enumeration Date
09-19-2020
Last Update Date
05-24-2026
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A primary care provider (PCP) like Mervin De Guzman Diaz sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc

Location Map

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

General Practice

Taxonomy Code
208D00000X
Type
Allopathic & Osteopathic Physicians
License No.
24685
License State
PR
Taxonomy Description
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1207P00000XAllopathic & Osteopathic Physicians

Emergency Medicine

24685 (PR)

Medicare Participation & PECOS Enrollment Status

Mervin De Guzman Diaz is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Mervin De Guzman Diaz is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 8426546862

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20251018000652

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Mervin De Guzman Diaz is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
RYDER MEMORIAL HOSPITAL INC355 AVE FONT MARTELO
HUMACAO, PR 00791
(787) 852-0768Acute Care Hospitals

Reviews for DR. MERVIN DE GUZMAN DIAZ MD

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Other Providers at the Same Location


The following 19 providers are registered at the same or a nearby location.

Internal Medicine (Hematology & Oncology)
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Counselor (Mental Health)
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Dental Assistant
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Counselor
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Counselor
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Case Manager/Care Coordinator
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Registered Nurse (General Practice)
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Case Manager/Care Coordinator
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Licensed Practical Nurse
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Licensed Practical Nurse
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Licensed Practical Nurse
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Social Worker
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Registered Nurse
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Case Manager/Care Coordinator
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Dentist (General Practice)
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Clinic/Center
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Psychologist (Clinical)
355 CALLE FONT MARTELO
HUMACAO, PR 00791
General Acute Care Hospital
355 CALLE FONT MARTELO
HUMACAO, PR 00791
Radiology (Diagnostic Radiology)
355 CALLE FONT MARTELO
HUMACAO, PR 00791

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1548876121, enumerated as an "individual" on September 19, 2020.

The provider is located at 355 CALLE FONT MARTELO HUMACAO, PR 00791 and the phone number is (787) 852-0768.

General Practice with taxonomy code 208D00000X.

Mervin De Guzman Diaz is affiliated with: RYDER MEMORIAL HOSPITAL INC.