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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. NELSON VALLEJO M.D.
NPI 1306812243
Internal Medicine in Las Piedras, PR

Active since February 28, 2006PECOS EnrolledAccepts Medicare Assignment
AVE JOSE C BARBOSA, # 225, LAS PIEDRAS, PR 00771(787) 733-3508(787) 733-0925 Get Directions Write a Review

NPPES record last updated: September 8, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 8, 2026, Apr 25, 2017 (2 updates tracked since 2017).

About Dr. Nelson Vallejo M.d. NPPES

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

DR. NELSON VALLEJO M.D. (NPI 1306812243) is an individual internal medicine provider in Las Piedras, Puerto Rico, licensed in Puerto Rico (10500) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1987).

NPPES Registry Identity

NPI1306812243
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. NELSON VALLEJOCredential: M.D.
Location AddressAVE JOSE C BARBOSA, # 225Las Piedras, PR 00771
Mailing AddressPo Box 8Las Piedras, PR 00771-0008 · (787) 733-3508 · Fax (787) 733-0925
Phone(787) 733-3508
Fax(787) 733-0925
Sole ProprietorNo
Medical School CMSOtherGraduated 1987
Enumeration DateFebruary 28, 2006
Last NPPES UpdateSeptember 8, 20262 updates tracked since enumeration
NPPES CertifiedSeptember 8, 2026
✔ NPI 1306812243 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in PR · 10500
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.

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. Nelson Vallejo 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 ID7113113341
PECOS Enrollment IDI20101130000309
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 Nelson Vallejo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Healthcare Integrate Program Services, Inc.
Multi-Specialty
355 CALLE FONT MARTELO
Humacao, PR 00791
  • Reassigned Medicare billing, Puerto Rico enrollment
  • 4 clinicians in this Medicare group
NPI 1952905374 (787) 852-0768

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

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 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.
25 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 00771 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
$130.65 typical visit price
range $56.86 – $172.44
Typical copayment $32.66 (range $14.21 – $43.11)
Most-billed visit code 99204
Established Patient
$100.24 typical visit price
range $18.24 – $140.44
Typical copayment $25.06 (range $4.56 – $35.11)
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.

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 Nelson Vallejo's NPI number?

The NPI number for Nelson Vallejo is 1306812243. It was assigned to this individual provider in the NPPES registry on February 28, 2006.

Where is Nelson Vallejo located?

Nelson Vallejo practices at Ave Jose C Barbosa # 225, Las Piedras, PR 00771. The listed phone number is (787) 733-3508.

What is Nelson Vallejo's specialty?

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

Is Nelson Vallejo enrolled in Medicare?

Yes. Nelson Vallejo 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 Nelson Vallejo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nelson Vallejo reassigns Medicare benefits to Healthcare Integrate Program Services, Inc. (Humacao, PR). 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 Nelson Vallejo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Nelson Vallejo was last updated on September 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 50 days 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.