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DR. KATHLEEN NIEVES MAS MD
NPI 1366195216
Physician Assistant in San Juan, PR

Active since February 01, 2022
1451 AVE DR ASHFORD, CONDADO, SAN JUAN, PR 00907(787) 721-2160 Get Directions Write a Review

NPPES record last updated: March 11, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 11, 2025, Mar 7, 2023, Mar 3, 2023 and 1 more (4 updates tracked since 2022).

About Dr. Kathleen Nieves Mas Md NPPES

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

DR. KATHLEEN NIEVES MAS MD (NPI 1366195216) is an individual physician assistant in San Juan, Puerto Rico, licensed in Puerto Rico (1584-P.A.) and active in the NPI registry since February 2022.

NPPES Registry Identity

NPI1366195216
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameDR. KATHLEEN NIEVES MASCredential: MD
Location Address1451 AVE DR ASHFORD, CONDADOSan Juan, PR 00907
Mailing AddressBo. Maguayo Parcelas El Cotto 29c Calle 1Dorado, PR 00646-3413 · (787) 460-9965
Phone(787) 721-2160
Sole ProprietorYes
Enumeration DateFebruary 1, 2022
Last NPPES UpdateMarch 11, 20254 updates tracked since enumeration
NPPES CertifiedMarch 11, 2025
✔ NPI 1366195216 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in PR · 1584-P.A.
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES 5

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

TLD ENDOSURGERY LLC
Surgery
1451 AVE DR ASHFORD, HOSPITAL LOBBY SURGERY CLINIC
SAN JUAN, PR 00907
San Juan Municipio (787) 722-6544
DR. WILFREDO SANTA RAMOS PHYSICIAN ASSISTANT
Physician Assistant
1451 AVE DR ASHFORD
SAN JUAN, PR 00907
San Juan Municipio (787) 721-2160
OMAR ELWISHAHI MD
General Practice
1451 AVE DR ASHFORD
SAN JUAN, PR 00907
San Juan Municipio (787) 721-2160
MS. NOELIA LOPEZ
Nurse Practitioner (Family)
1451 AVE DR ASHFORD
SAN JUAN, PR 00907
San Juan Municipio (787) 721-2160
KARINA IRIZARRY
Registered Nurse
1451 AVE DR ASHFORD
SAN JUAN, PR 00907
San Juan Municipio (787) 721-2163

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 Kathleen Nieves Mas's NPI number?

The NPI number for Kathleen Nieves Mas is 1366195216. It was assigned to this individual provider in the NPPES registry on February 1, 2022.

Where is Kathleen Nieves Mas located?

Kathleen Nieves Mas practices at 1451 Ave Dr Ashford Condado, San Juan, PR 00907. The listed phone number is (787) 721-2160.

What is Kathleen Nieves Mas's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

When was this NPI record last updated?

The NPPES record for Kathleen Nieves Mas was last updated on March 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.