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PEAK INTERNAL MEDICINE
NPI 1619452364
Internal Medicine in Louisville, CO

Active since September 28, 2018CLIA 06D2170302 · Microscopy
400 S MCCASLIN BLVD STE 200, LOUISVILLE, CO 80027(720) 222-0648(720) 222-0654 Get Directions Write a Review

NPPES record last updated: June 11, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 11, 2019, Nov 15, 2018, Sep 28, 2018 (3 updates tracked since 2018).

About Peak Internal Medicine NPPES

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

PEAK INTERNAL MEDICINE (NPI 1619452364) is a healthcare organization registered as an internal medicine in Louisville, Colorado and active in the NPI registry since September 2018. The organization holds a CLIA Microscopy certificate valid through August 6, 2027 and lists Jennifer Tamblyn, Owner, as its authorized official.

NPPES Registry Identity

NPI1619452364
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NamePEAK INTERNAL MEDICINE
Location Address400 S MCCASLIN BLVD STE 200Louisville, CO 80027-9701
Mailing Address400 S Mccaslin Blvd Ste 200Superior, CO 80027-9701 · (720) 222-0648 · Fax (720) 222-0654
Phone(720) 222-0648
Fax(720) 222-0654
Organization SubpartNo
Authorized OfficialJennifer TamblynOwner · (720) 272-9112
Enumeration DateSeptember 28, 2018
Last NPPES UpdateJune 11, 20193 updates tracked since enumeration
✔ NPI 1619452364 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.
400 S MCCASLIN BLVD STE 200, Louisville, CO 80027
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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)

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

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Peak Internal Medicine, which bills Medicare for the services they deliver. Of these, 1 practice within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Gemma Stella, NP-C
Nurse Practitioner
NPI 1043661226
90 HEALTH PARK DR STE 350
Louisville, CO 80027
(303) 269-2700
✔ PECOS✔ Accepts Medicare1.9 mi
Jennifer Tamblyn, M.D.
Internal Medicine
NPI 1881860773
1721 E 19TH AVE SUITE 500
Denver, CO 80218
(303) 869-2160
✔ PECOS✔ Accepts Medicare19 mi

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

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 06D2170302

Peak Internal Medicine · Louisville, CO
Active · expires Aug 6, 2027
CLIA Number06D2170302
Laboratory TypePhysician Office
Certificate Effective DateAugust 7, 2025
Certificate Expiration DateAugust 6, 2027
Laboratory DirectorDr. Jennifer Tamblyn
Laboratory Phone(720) 222-0648
Laboratory LocationPeak Internal Medicine400 S Mccaslin Blvd Suite 200, Louisville, CO 80027
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

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 Peak Internal Medicine's NPI number?

The NPI number for Peak Internal Medicine is 1619452364. It was assigned to this organization in the NPPES registry on September 28, 2018.

Where is Peak Internal Medicine located?

Peak Internal Medicine is located at 400 S Mccaslin Blvd Ste 200, Louisville, CO 80027. The listed phone number is (720) 222-0648.

What is Peak Internal Medicine's specialty?

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

Is Peak Internal Medicine enrolled in Medicare?

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

How many clinicians bill Medicare through Peak Internal Medicine?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Peak Internal Medicine, in Internal Medicine and Nurse Practitioner. 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. Of these, 1 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Peak Internal Medicine hold a CLIA laboratory certificate?

Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 06D2170302) is associated with this NPI, valid through August 6, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Peak Internal Medicine was last updated on June 11, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.