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DR. MARA LIZ FERNANDEZ-SANTIAGO MD
NPI 1235493867
Pathology - Anatomic Pathology & Clinical Pathology in Columbus, OH

Active since June 28, 2012PECOS EnrolledAccepts Medicare Assignment
3400 OLENTANGY RIVER RD, COLUMBUS, OH 43202(414) 805-3666(414) 805-6980 Get Directions Write a Review

NPPES record last updated: May 21, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 14, 2022, Sep 15, 2022, Jun 21, 2021 and 1 more (4 updates tracked since 2019).

About Dr. Mara Liz Fernandez-santiago Md NPPES

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

DR. MARA LIZ FERNANDEZ-SANTIAGO MD (NPI 1235493867) is an individual anatomic pathology & clinical pathology provider in Columbus, Ohio, licensed in Wisconsin (75160) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS and is a graduate of University Of Puerto Rico School Of Medicine (2011).

NPPES Registry Identity

NPI1235493867
Entity TypeIndividualFemale
Primary Taxonomy207ZP0102X
Provider Legal NameDR. MARA LIZ FERNANDEZ-SANTIAGOCredential: MD
Location Address3400 OLENTANGY RIVER RDColumbus, OH 43202-1523
Mailing Address3400 Olentangy River RdColumbus, OH 43202-1523 · (614) 754-5500
Phone(414) 805-3666
Fax(414) 805-6980
Sole ProprietorNo
Medical School CMSUniversity Of Puerto Rico School Of MedicineGraduated 2011
Enumeration DateJune 28, 2012
Last NPPES UpdateMay 21, 20244 updates tracked since enumeration
NPPES CertifiedMay 21, 2024
✔ NPI 1235493867 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in WI · 75160
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
3400 OLENTANGY RIVER RD, Columbus, OH 43202
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Other Identifiers 1

Medicaid1235493867WI

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. Mara Liz Fernandez-santiago 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 ID8123326642
PECOS Enrollment IDI20220803000983
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 Mara Fernandez-santiago reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ohio Gastroenterology Group, Inc.
Same address
Gastroenterology
3400 OLENTANGY RIVER RD
Columbus, OH 43202
  • Reassigned Medicare billing, Ohio enrollment
  • 116 clinicians in this Medicare group
NPI 1124197637 (614) 754-5500

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 6

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.

Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
3,264 services1,429 patients
Special stained specimen slides to identify organisms including interpretation and report 88312
This service involves coloring specimen slides in a special way to help identify organisms. The colors make different parts of the organism stand out. Afterward, a detailed interpretation and report on the findings are provided.
761 services402 patients
Special stained specimen slides to examine tissue including interpretation and report 88313
Special stained specimen slides are used to examine tissue samples. This involves applying special dyes to the tissue, which helps to highlight certain features under a microscope. The findings are then interpreted and a report is provided. This can aid in diagnosing various health conditions.
729 services446 patients
Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
46 services17 patients
Special stained specimen slides to examine tissue, initial procedure 88342
This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.
27 services23 patients
Pathology examination of tissue using a microscope, moderately high complexity 88307
A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.
15 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 43202 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
$126.12 typical visit price
range $54.34 – $166.65
Typical copayment $31.53 (range $13.58 – $41.66)
Most-billed visit code 99204
Established Patient
$96.44 typical visit price
range $17.10 – $135.40
Typical copayment $24.11 (range $4.27 – $33.85)
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.

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.

DR. RUCHI BHATIA MD
Internal Medicine (Transplant Hepatology)
3400 OLENTANGY RIVER RD
COLUMBUS, OH 43202
Franklin County (614) 754-5500
CENTRAL OHIO ENDOSCOPY CENTER, LLC
Clinic/Center (Endoscopy)
3400 OLENTANGY RIVER RD
COLUMBUS, OH 43202
Franklin County (614) 754-5500
MR. ANTHONY J MICHAELS MD
Internal Medicine (Transplant Hepatology)
3400 OLENTANGY RIVER RD
COLUMBUS, OH 43202
Franklin County (614) 754-5500
DR. LEENA TARIGOPULA MD
Internal Medicine (Gastroenterology)
3400 OLENTANGY RIVER RD
COLUMBUS, OH 43202
Franklin County (614) 754-5500
ADAM JAMES HANJE M.D.
Internal Medicine (Transplant Hepatology)
3400 OLENTANGY RIVER RD
COLUMBUS, OH 43202
Franklin County (614) 754-5500
SARA JO DORAN CNP
Nurse Practitioner (Family)
3400 OLENTANGY RIVER RD
COLUMBUS, OH 43202
Franklin County (614) 754-5500
NICOLE SNYDER NP
Nurse Practitioner (Family)
3400 OLENTANGY RIVER RD, SUITE 100
COLUMBUS, OH 43202
Franklin County (614) 262-7426
MICHELLE CHRISTINE HAMILTON
Nurse Practitioner (Acute Care)
3400 OLENTANGY RIVER RD
COLUMBUS, OH 43202
Franklin County (614) 754-5500

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 Mara Fernandez-santiago's NPI number?

The NPI number for Mara Fernandez-santiago is 1235493867. It was assigned to this individual provider in the NPPES registry on June 28, 2012.

Where is Mara Fernandez-santiago located?

Mara Fernandez-santiago practices at 3400 Olentangy River Rd, Columbus, OH 43202. The listed phone number is (414) 805-3666.

What is Mara Fernandez-santiago's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Mara Fernandez-santiago enrolled in Medicare?

Yes. Mara Fernandez-santiago 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 Mara Fernandez-santiago's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mara Fernandez-santiago reassigns Medicare benefits to Ohio Gastroenterology Group, Inc. (Columbus, OH). 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 Mara Fernandez-santiago'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 Mara Fernandez-santiago was last updated on May 21, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.