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MARVIN DIAZ-LACAYO M.D.
NPI 1477590214
Internal Medicine in Dorchester Center, MA

Active since June 01, 2006PECOS EnrolledAccepts Medicare Assignment
2100 DORCHESTER AVE, DORCHESTER CENTER, MA 02124(617) 296-4000(617) 474-3856 Get Directions Write a Review

NPPES record last updated: October 19, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Marvin Diaz-lacayo M.d. NPPES

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

MARVIN DIAZ-LACAYO M.D. (NPI 1477590214) is an individual internal medicine provider in Dorchester Center, Massachusetts, licensed in Massachusetts (223423) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Medical Center, and is a graduate of Other (1999).

NPPES Registry Identity

NPI1477590214
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameMARVIN DIAZ-LACAYOCredential: M.D.
Location Address2100 DORCHESTER AVEDorchester Center, MA 02124-5615
Mailing Address2100 Dorchester AveDorchester Center, MA 02124-5615 · (617) 506-4901
Phone(617) 296-4000
Fax(617) 474-3856
Sole ProprietorNo
Medical School CMSOtherGraduated 1999
Enumeration DateJune 1, 2006
Last NPPES UpdateOctober 19, 2011
✔ NPI 1477590214 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 · 223423
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.
2100 DORCHESTER AVE, Dorchester Center, MA 02124
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Accepted Insurance

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

Marvin Diaz-lacayo 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 ID6709899024
PECOS Enrollment IDI20060802000511
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 Marvin Diaz-lacayo reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Tufts Medical Center Community Care, Inc
4.3 mi
Internal Medicine
325 WOOD RD, SUITE 210
Braintree, MA 02184
  • Reassigned Medicare billing, Massachusetts enrollment
  • 21 clinicians in this Medicare group
NPI 1063805687 (781) 356-3336
Steward Medical Group, Inc
8.5 mi
Specialist
9 GALEN ST
Watertown, MA 02472
  • Reassigned Medicare billing, Massachusetts enrollment
  • 1,103 clinicians in this Medicare group
NPI 1629398219 (615) 467-4474

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 9

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.
222 services134 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.
94 services81 patients
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
66 services38 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
55 services55 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
55 services55 patients
Influenza vaccine, inactivated 90653
The Influenza vaccine, inactivated, is a shot given to protect against the flu. It contains killed virus particles that help your body build immunity to the flu. It's recommended annually to keep your protection up-to-date. It's safe for ages 6 months and up.
47 services47 patients

Hospital Affiliations CMS Care Compare 5

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

Beth Israel Deaconess Medical Center

Acute Care Hospitals · Boston, MA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220086
Location330 Brookline AvenueBoston, MA 02215 · 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

Beth Israel Deaconess Hospital - Milton

Acute Care Hospitals · Milton, MA
4/5 CMS rating
OwnershipGovernment - Federal
CMS Certification Number220108
Location199 Reedsdale RoadMilton, MA 02186 · Norfolk County
Emergency services

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

Tufts Medical Center

Acute Care Hospitals · Boston, MA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220116
Location800 Washington StreetBoston, MA 02111 · Suffolk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02124 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.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Alginate or other fiber gelling dressing, wound cover, sterile, pad size 16 sq. in. or less, each dressing A6196
DME-Medical/Surgical Supplies · category DA023N
1 supplier39 claims2,088 services$7.10 avg. paid by Medicare
Alginate or other fiber gelling dressing, wound cover, sterile, pad size more than 16 sq. in. but less than or equal to 48 sq. in., each dressing A6197
DME-Medical/Surgical Supplies · category DA023N
1 supplier15 claims543 services$15.85 avg. paid by Medicare
Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035
Other-Enteral and Parenteral · category OB006N
1 supplier17 claims221 services$4.29 avg. paid by Medicare
Enteral formula, nutritionally complete, for special metabolic needs, excludes inherited disease of metabolism, includes altered composition of proteins, fats, carbohydrates, vitamins and/or minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4154
Other-Enteral and Parenteral · category OB006N
1 supplier12 claims2,312 services$0.58 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

ELENA ROTFELD
Pharmacist
2100 DORCHESTER AVE, SEMC GPU AT CARNEY HOSPITAL
DORCHESTER, MA 02124
Suffolk County (617) 506-4536
DR. DANA MARIE HORNBEAK M.D., M.P.H.
Internal Medicine
2100 DORCHESTER AVE, CARITAS CARNEY HOSPITAL, 7 SOUTH
DORCHESTER, MA 02124
Suffolk County (617) 506-2726
CARITAS CARNEY HOSPITAL
Durable Medical Equipment & Medical Supplies
2100 DORCHESTER AVE
DORCHESTER CENTER, MA 02124
Suffolk County (617) 296-4000
CARITAS CARNEY HOSPITAL
Long Term Care Hospital
2100 DORCHESTER AVE
DORCHESTER CENTER, MA 02124
Suffolk County (617) 296-4000
BRECKON DANIEL PAV M.D.
Emergency Medicine
2100 DORCHESTER AVE
DORCHESTER, MA 02124
Suffolk County (617) 296-4000
RAMNINDER SINGH NAGRA MD
Internal Medicine
2100 DORCHESTER AVE
DORCHESTER, MA 02124
Suffolk County (617) 506-2726
DONNA L SPRINGS MD
Emergency Medicine
2100 DORCHESTER AVE
DORCHESTER CENTER, MA 02124
Suffolk County (617) 296-4000
MUSTAFA M SYED MD
Psychiatry & Neurology (Psychiatry)
2100 DORCHESTER AVE
DORCHESTER CENTER, MA 02124
Suffolk County (617) 296-4000

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 Marvin Diaz-lacayo's NPI number?

The NPI number for Marvin Diaz-lacayo is 1477590214. It was assigned to this individual provider in the NPPES registry on June 1, 2006.

Where is Marvin Diaz-lacayo located?

Marvin Diaz-lacayo practices at 2100 Dorchester Ave, Dorchester Center, MA 02124. The listed phone number is (617) 296-4000.

What is Marvin Diaz-lacayo's specialty?

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

Is Marvin Diaz-lacayo enrolled in Medicare?

Yes. Marvin Diaz-lacayo 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 Marvin Diaz-lacayo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marvin Diaz-lacayo reassigns Medicare benefits to 2 organizations: Tufts Medical Center Community Care, Inc (Braintree, MA) and Steward Medical Group, Inc (Watertown, 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 Marvin Diaz-lacayo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marvin Diaz-lacayo accept?

Health plans from Anthem Blue Cross and Blue Shield list Marvin Diaz-lacayo 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 Marvin Diaz-lacayo affiliated with any hospitals?

According to CMS data, Marvin Diaz-lacayo is affiliated with Beth Israel Deaconess Medical Center, South Shore Hospital, Beth Israel Deaconess Hospital - Milton, Brigham And Women's Hospital and Tufts Medical Center.

When was this NPI record last updated?

The NPPES record for Marvin Diaz-lacayo was last updated on October 19, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.