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INTERNAL MEDICINE CENTER
NPI 1407206725
Internal Medicine in Littleton, CO

Active since June 17, 2016
8210 SOUTHPARK TER, LITTLETON, CO 80120(303) 345-8291(720) 914-1010 Get Directions Write a Review

NPPES record last updated: January 31, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 10, 2025, Jun 6, 2023, Nov 6, 2022 and 1 more (4 updates tracked since 2016).

About Internal Medicine Center NPPES

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

INTERNAL MEDICINE CENTER (NPI 1407206725) is a healthcare organization registered as an internal medicine in Littleton, Colorado and active in the NPI registry since June 2016. The organization lists Joshua Portnoy, Owner, as its authorized official.

NPPES Registry Identity

NPI1407206725
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameINTERNAL MEDICINE CENTER
Location Address8210 SOUTHPARK TERLittleton, CO 80120-5614
Mailing Address9301 Poundstone PlGreenwood Village, CO 80111-3410 · (303) 345-8291 · Fax (720) 914-1010
Phone(303) 345-8291
Fax(720) 914-1010
Organization SubpartNo
Authorized OfficialJoshua PortnoyOwner · (303) 345-8291
Enumeration DateJune 17, 2016
Last NPPES UpdateJanuary 31, 20254 updates tracked since enumeration
NPPES CertifiedJanuary 31, 2025
✔ NPI 1407206725 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
8210 SOUTHPARK TER, Littleton, CO 80120
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Other Identifiers 1

Medicaid69412529CO

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

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Internal Medicine Center is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

11

Medicare enrollment records show 11 clinicians reassign Medicare billing to Internal Medicine Center, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 9 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 2

Nurse Practitioner6
Critical Care (Intensivists)5

Clinicians, nearest first (11)

Joshua Portnoy, M.D.
Critical Care (Intensivists)
NPI 1952362154
8210 SOUTHPARK TER
Littleton, CO 80120
(720) 914-1000
✔ PECOS✔ Accepts MedicareSame address
Alecia Brynda, ACNP
Nurse Practitioner
NPI 1598004780
1000 SOUTHPARK DR
Littleton, CO 80120
(303) 744-1065
✔ PECOS✔ Accepts Medicare0.4 mi
Kelly Greene, M.D.
Critical Care (Intensivists)
NPI 1790857340
15 W DRY CREEK CIR
Littleton, CO 80120
(303) 952-1100
✔ PECOS✔ Accepts Medicare0.9 mi
Bree Naibauer, N.P.
Nurse Practitioner
NPI 1093132243
15 W DRY CREEK CIR
Littleton, CO 80120
(303) 952-1100
✔ PECOS0.9 mi
Erin Riggle, M.D.
Critical Care (Intensivists)
NPI 1003004771
15 W DRY CREEK CIR
Littleton, CO 80120
(303) 952-1100
✔ PECOS✔ Accepts Medicare0.9 mi
Kristen Whitted, FNP-C
Nurse Practitioner
NPI 1336170117
8671 S QUEBEC ST STE 200
Highlands Ranch, CO 80130
(303) 805-7477
✔ PECOS✔ Accepts Medicare4.6 mi
Kathryn Logothetis, M.D.
Critical Care (Intensivists)
NPI 1750745915
7100 E BELLEVIEW AVE STE G10
Greenwood Village, CO 80111
(303) 745-0000
✔ PECOS✔ Accepts Medicare6.0 mi
Nitin Gupta, D.O.
Critical Care (Intensivists)
NPI 1457647646
9362 TEDDY LN STE 105
Lone Tree, CO 80124
(515) 865-1568
✔ PECOS6.2 mi
Leah Magestro, FNP-C
Nurse Practitioner
NPI 1265174353
11747 W KEN CARYL AVE
Littleton, CO 80127
(720) 981-2069
✔ PECOS✔ Accepts Medicare7.4 mi
Barbara Chesnutt, ACNP
Nurse Practitioner
NPI 1982877767
12605 E 16TH AVE
Aurora, CO 80045
(720) 848-0000
✔ PECOS✔ Accepts Medicare14 mi
Amy Pandorf, FNP-C
Nurse Practitioner
NPI 1245742824
1665 AURORA CT
Aurora, CO 80045
(720) 848-0000
✔ PECOS✔ Accepts Medicare15 mi

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

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 Internal Medicine Center's NPI number?

The NPI number for Internal Medicine Center is 1407206725. It was assigned to this organization in the NPPES registry on June 17, 2016.

Where is Internal Medicine Center located?

Internal Medicine Center is located at 8210 Southpark Ter, Littleton, CO 80120. The listed phone number is (303) 345-8291.

What is Internal Medicine Center's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Internal Medicine Center enrolled in Medicare?

Yes. Internal Medicine Center is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Internal Medicine Center?

According to the CMS Revalidation Reassignment List (October 2026 release), 11 clinicians in 2 Medicare specialties reassign their Medicare billing to Internal Medicine Center. A 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 the clinician's services. The largest specialties are Nurse Practitioner (6) and Critical Care (Intensivists) (5). Of these, 1 practice at this address and 9 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Internal Medicine Center was last updated on January 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.