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DR. MADHAN SRINATH IYENGAR M.D.
NPI 1326316647
Internal Medicine - Gastroenterology in Lone Tree, CO

Active since December 01, 2011PECOS Enrolled
10240 PARK MEADOWS DR, LONE TREE, CO 80124(303) 338-4545 Get Directions Write a Review

NPPES record last updated: May 18, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 18, 2021, Feb 20, 2020, Sep 20, 2018 and 2 more (5 updates tracked since 2017).

About Dr. Madhan Srinath Iyengar M.d. NPPES

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

DR. MADHAN SRINATH IYENGAR M.D. (NPI 1326316647) is an individual gastroenterology provider in Lone Tree, Colorado, licensed in Colorado (DR.0057835) and active in the NPI registry since December 2011. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1326316647
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. MADHAN SRINATH IYENGARCredential: M.D.
Location Address10240 PARK MEADOWS DRLone Tree, CO 80124-5425
Mailing Address10350 E Dakota AveDenver, CO 80247-1314
Phone(303) 338-4545
Sole ProprietorNo
Enumeration DateDecember 1, 2011
Last NPPES UpdateMay 18, 20215 updates tracked since enumeration
NPPES CertifiedMay 18, 2021
✔ NPI 1326316647 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CO · DR.0057835
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
Also ListedInternal MedicineTaxonomy 207R00000X · License A118800 (CA), DR.0057835 (CO)
10240 PARK MEADOWS DR, Lone Tree, CO 80124
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Secondary Practice Locations 2

Location 11048 S Hayworth AveLos Angeles, CA 90035-2602 · Phone (213) 217-0395
Location 22535 S Downing St Ste 360Denver, CO 80210-5850 · Phone (303) 260-2740 · Fax (303) 260-2741

Other Identifiers 2

Other028997CO · Kaiser Commercial Number
Medicaid9000149020CO

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Madhan Srinath Iyengar 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.

Medicare Billing Reassignment

Medicare enrollment records show Madhan Iyengar reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Colorado Permanente Medical Group, P.C.
11 mi
Internal Medicine
10350 E DAKOTA AVE
Denver, CO 80247
  • Reassigned Medicare billing, Colorado enrollment
  • Medicare enrollment name: Colorado Permanente Medical Group PC
  • 1,715 clinicians in this Medicare group
NPI 1760599724 (303) 338-4545

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80124 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
$132.55 typical visit price
range $58.06 – $174.82
Typical copayment $33.13 (range $14.51 – $43.70)
Most-billed visit code 99204
Established Patient
$102.03 typical visit price
range $18.88 – $142.79
Typical copayment $25.50 (range $4.72 – $35.69)
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.

GWYNNE I BAERNS RN
Registered Nurse
10240 PARK MEADOWS DR
LONE TREE, CO 80124
Douglas County (303) 338-4545
AMANDA M MARDIS RN
Registered Nurse
10240 PARK MEADOWS DR
LONE TREE, CO 80124
Douglas County (303) 338-4545
ANDREW R STEPHENITCH MPT
Physical Therapist
10240 PARK MEADOWS DR
LONE TREE, CO 80124
Douglas County (303) 338-4545
MICHELLE PLIMPTON
Registered Nurse
10240 PARK MEADOWS DR
LONE TREE, CO 80124
Douglas County (303) 338-4545
KRISTI R STARK FNP
Nurse Practitioner (Family)
10240 PARK MEADOWS DR
LONE TREE, CO 80124
Douglas County (303) 338-4545
COLLEEN DYNEL CAMPBELL NP
Nurse Practitioner (Adult Health)
10240 PARK MEADOWS DR
LONE TREE, CO 80124
Douglas County (303) 338-4545
MELISSA CHRISTINA-MARIE GORDON CST, CSFA
Specialist/Technologist, Other (Surgical Assistant)
10240 PARK MEADOWS DR
LONE TREE, CO 80124
Douglas County (303) 338-4545
MRS. LAURA B ERAL M.S.P.T.
Physical Therapist
10240 PARK MEADOWS DR
LONE TREE, CO 80124
Douglas County (303) 338-4545

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 Madhan Iyengar's NPI number?

The NPI number for Madhan Iyengar is 1326316647. It was assigned to this individual provider in the NPPES registry on December 1, 2011.

Where is Madhan Iyengar located?

Madhan Iyengar practices at 10240 Park Meadows Dr, Lone Tree, CO 80124. The listed phone number is (303) 338-4545.

What is Madhan Iyengar's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Madhan Iyengar enrolled in Medicare?

Yes. Madhan Iyengar is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Madhan Iyengar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Madhan Iyengar reassigns Medicare benefits to Colorado Permanente Medical Group, P.C. (Denver, CO). 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 Madhan Iyengar'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 Madhan Iyengar was last updated on May 18, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.