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

NINA KARLSEN AYALA MD
NPI 1669899522
Obstetrics & Gynecology - Maternal & Fetal Medicine in Providence, RI

Q: What is Nina Ayala's NPI number?

The NPI number for Nina Ayala is 1669899522. It was assigned to this individual provider in the NPPES registry on March 27, 2014. The provider is also known as Nina Terez Karlsen-Ayala.

Q: What is Nina Ayala's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Q: When was this NPI record last updated?

The NPPES record for Nina Ayala was last updated on September 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.

Active since March 27, 2014PECOS Enrolled

101 PLAIN ST FL 6, PROVIDENCE, RI 02903(401) 274-1122 Get Directions Write a Review

NPPES record last updated: September 21, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Sep 21, 2026, Jul 9, 2024, Jul 9, 2021 and 2 more (5 updates tracked since 2016).

On this page

About Nina Karlsen Ayala Md NPPES

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

NINA KARLSEN AYALA MD (NPI 1669899522) is an individual maternal & fetal medicine provider in Providence, Rhode Island, licensed in Rhode Island (MD16234) and active in the NPI registry since March 2014. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2014).

NPPES Registry Identity

NPI1669899522

Entity TypeIndividualFemale

Primary Taxonomy207VM0101X

Provider Legal NameNINA KARLSEN AYALACredential: MD

Location Address101 PLAIN ST FL 6Providence, RI 02903

Mailing Address455 Toll Gate Rd, Prc And CredentialingWarwick, RI 02886-2759 · (401) 273-0641 · Fax (401) 273-2919

Phone(401) 274-1122

Sole ProprietorNo

Medical School CMSOtherGraduated 2014

Enumeration DateMarch 27, 2014

Last NPPES UpdateSeptember 21, 20265 updates tracked since enumeration

NPPES CertifiedSeptember 21, 2026

✔ NPI 1669899522 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207VM0101X

License✔ Licensed in RI · MD16234

Definition

An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.

101 PLAIN ST FL 6, Providence, RI 02903

Open in Google Maps ↗

Other Names 1

Former Name (1)Nina Terez Karlsen-ayala

Secondary Practice Locations 2

Location 190 Plain StProvidence, RI 02903-4817 · Phone (401) 274-1122 ext. 47457 · Fax (401) 277-3694

Location 2101 Dudley StProvidence, RI 02905-2401 · Phone (401) 274-1100

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, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Nina Karlsen Ayala Md 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 ID9133418270

PECOS Enrollment IDI20180605002695, I20210720000223

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02903 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

$134.17 typical visit price

range $58.57 – $177.03

Typical copayment $33.54 (range $14.64 – $44.25)

Most-billed visit code 99204

Established Patient

$72.93 typical visit price

range $18.92 – $144.38

Typical copayment $18.23 (range $4.73 – $36.09)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 16

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

MS. CHRISTINA STANG LICSW

Social Worker (Clinical)