1. Home
  2. Directory
  3. Illinois
  4. Naperville
  5. Internal Medicine
  6. NPI Profile

MARK R. OTTOLIN M.D.
NPI 1265525729
Internal Medicine - Cardiovascular Disease in Naperville, IL

Active since October 02, 2006PECOS Enrolled
100 SPALDING DRIVE, SUITE 212, NAPERVILLE, IL 60504(630) 357-4111(630) 357-4644 Get Directions Write a Review

NPPES record last updated: September 24, 2021. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Sep 24, 2021, May 24, 2019 (2 updates tracked since 2019).

About Mark R. Ottolin M.d. NPPES

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

MARK R. OTTOLIN M.D. (NPI 1265525729) is an individual cardiovascular disease provider in Naperville, Illinois, licensed in Illinois (036-064112) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1265525729
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameMARK R. OTTOLINCredential: M.D.
Location Address100 SPALDING DRIVE, SUITE 212Naperville, IL 60504-6552
Mailing Address1860 Paysphere CirChicago, IL 60674-0018 · (630) 469-9200
Phone(630) 357-4111
Fax(630) 357-4644
Sole ProprietorNo
Enumeration DateOctober 2, 2006
Last NPPES UpdateSeptember 24, 20212 updates tracked since enumeration
NPPES CertifiedSeptember 24, 2021
✔ NPI 1265525729 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in IL · 036-064112
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
100 SPALDING DRIVE, Naperville, IL 60504
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark R. Ottolin M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 60504 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
$137.43 typical visit price
range $59.81 – $181.38
Typical copayment $34.35 (range $14.95 – $45.34)
Most-billed visit code 99204
Established Patient
$74.38 typical visit price
range $19.15 – $147.12
Typical copayment $18.59 (range $4.78 – $36.78)
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.

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 Mark Ottolin's NPI number?

The NPI number for Mark Ottolin is 1265525729. It was assigned to this individual provider in the NPPES registry on October 2, 2006.

Where is Mark Ottolin located?

Mark Ottolin practices at 100 Spalding Drive Suite 212, Naperville, IL 60504. The listed phone number is (630) 357-4111.

What is Mark Ottolin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Mark Ottolin enrolled in Medicare?

Yes. Mark Ottolin is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mark Ottolin was last updated on September 24, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.