Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. LINDSEY CASSIDY M.D.
NPI 1336553445
Family Medicine in Denver, CO

Q: What is Lindsey Cassidy's NPI number?

The NPI number for Lindsey Cassidy is 1336553445. It was assigned to this individual provider in the NPPES registry on June 17, 2014.

Q: What is Lindsey Cassidy's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: Is Lindsey Cassidy enrolled in Medicare?

No. Lindsey Cassidy has opted out of Medicare through December 13, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Q: When was this NPI record last updated?

The NPPES record for Lindsey Cassidy was last updated on October 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days 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.

Active since June 17, 2014Opted out of Medicare · through Dec 13, 2026CLIA 06D2244112 · Waiver

3300 E 1ST AVE STE 280, DENVER, CO 80206(720) 805-0720 Get Directions Write a Review

NPPES record last updated: October 30, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Oct 30, 2026, Mar 17, 2018, Mar 5, 2018 and 1 more (4 updates tracked since 2017).

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About Dr. Lindsey Cassidy M.d. NPPES

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

DR. LINDSEY CASSIDY M.D. (NPI 1336553445) is an individual family medicine provider in Denver, Colorado, licensed in Colorado (CDRH.0059054) and active in the NPI registry since June 2014. She has opted out of Medicare through December 13, 2026 and remains eligible to order and refer, holds a CLIA Waiver certificate valid through November 28, 2027, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1336553445

Entity TypeIndividualFemale

Primary Taxonomy207Q00000X

Provider Legal NameDR. LINDSEY CASSIDYCredential: M.D.

Location Address3300 E 1ST AVE STE 280Denver, CO 80206-5806

Mailing Address3300 E 1st Ave Ste 280Denver, CO 80206-5806 · (720) 805-0720 · Fax (720) 805-0721

Phone(720) 805-0720

Sole ProprietorYes

Enumeration DateJune 17, 2014

Last NPPES UpdateOctober 30, 20264 updates tracked since enumeration

NPPES CertifiedOctober 30, 2026

✔ NPI 1336553445 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in CO · CDRH.0059054

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

3300 E 1ST AVE STE 280, Denver, CO 80206

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Secondary Practice Locations 3

Location 12000 E Greenville St, Suite 3700Anderson, SC 29621-1580 · Phone (864) 512-1475

Location 24545 E. 9th Avenue, Suite 010Denver, CO 80220-3907 · Phone (303) 584-7900

Location 312605 E 16th AveAurora, CO 80045-2545 · Phone (720) 848-0000

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

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Opted out of Medicare

Dr. Lindsey Cassidy M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from December 13, 2022 through December 13, 2026.

Opt-Out Effective DateDecember 13, 2022

Opt-Out In Effect ThroughDecember 13, 2026Opt-out affidavits renew automatically every two years unless cancelled

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

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 of Waiver 06D2244112

Lindsey Cassidy MD And Associates · Denver, CO

Active · expires Nov 28, 2027

CLIA Number06D2244112

Laboratory TypePhysician Office

Certificate Effective DateNovember 29, 2025

Certificate Expiration DateNovember 28, 2027

Laboratory DirectorDr. Lindsey E. Cassidy

Laboratory Phone(720) 805-0720

Laboratory LocationLindsey Cassidy MD And Associates3300 E 1st Ave, Suite 280, Denver, CO 80206

CLIA data matches this NPI record on: Address Name Phone

This certificate is issued to a laboratory to perform only waived tests.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80206 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

$89.43 typical visit price

range $58.06 – $174.82

Typical copayment $22.35 (range $14.51 – $43.70)

Most-billed visit code 99203

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.

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 Lindsey Cassidy's NPI number?

The NPI number for Lindsey Cassidy is 1336553445. It was assigned to this individual provider in the NPPES registry on June 17, 2014.

Where is Lindsey Cassidy located?

Lindsey Cassidy practices at 3300 E 1st Ave Ste 280, Denver, CO 80206. The listed phone number is (720) 805-0720.

What is Lindsey Cassidy's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Lindsey Cassidy enrolled in Medicare?

No. Lindsey Cassidy has opted out of Medicare through December 13, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Does Lindsey Cassidy hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 06D2244112) is associated with this NPI, valid through November 28, 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 Lindsey Cassidy was last updated on October 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days 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.