NPPES file of Aug 9, 2026

Kassandra Kay McMillen, M.D,

Obstetrics & Gynecology Physician · Castle Rock, CO

Kassandra Kay McMillen, M.D, is an obstetrics & gynecology physician with a practice address in Castle Rock, Colorado, and NPI 1659746477, issued on Dec 4, 2015. Check the license (Colorado DR0060302, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1659746477
Name
Kassandra Kay McMillen
Credential
M.D,
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License number
DR0060302 CO
Self-reported in NPPES; status is on the state search
Practice location
2350 Meadows Blvd, Castle Rock, CO 80109
Phone
(720) 455-0350
Enumerated
Dec 4, 2015
Record last updated
Feb 26, 2025
Fax
(720) 455-0351
Medicaid ID
9000167241 CO
Medicare enrollment
Enrolled (PECOS I20180629000341); accepts Medicare assignment
Medical or professional school
University Of Arkansas College Of Medicine, 2014
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest obstetrics & gynecology physician records → All 906 in Colorado → Look up another NPI →

Also registered at 2350 Meadows Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Aida AbrahamHospitalist Physician1922502152
  2. Steven Antonovich, D.O.Anesthesiology Physician1376924449
  3. Lynn Barta, M.D.Obstetrics & Gynecology Physician1851330492
  4. Caroline Cinquegrani, MDObstetrics & Gynecology Physician1649353251
  5. Jason CroftRegistered Nurse1699698704
  6. Scott Faulkner, M.D.Internal Medicine Physician1942262209

Verify Kassandra Kay McMillen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersColorado Medical Board
    Search for license DR0060302    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Colorado license search

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25% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024

124 Medicare Part D claims for 55 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.

  1. Kassandra McMillen124
  2. Specialty average165

Most prescribed

  1. Estradiol33 claims
  2. Solifenacin Succinate20 claims
  3. Progesterone15 claims
  4. Clobetasol Propionate13 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $17.15

1 payment: food and beverage; the largest payer was Hologic Sales and Service, LLC. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Kassandra McMillen$17.15
  2. Specialty average$1,030.61

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Portercare Adventist Health SystemCastle Rock, CO

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Kassandra Kay McMillen among 906 obstetrics & gynecology physician records in Colorado

Kassandra Kay McMillen, M.D, is one of 906 obstetrics & gynecology physician records with a practice address in Colorado. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 82% of them.

  • NPI issued2015 · 82% of these records are older, 13% newer
  • In a Medicare fileYes · 69% of these records are
  • In the CMS Doctors and Clinicians fileYes · 56% of these records are
  • Graduated2014 · median 2008 among the 504 with a school on file
  • Record last updated2025 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

14 obstetrics & gynecology physician records list a practice address in Castle Rock

They are 14 of the 1,319 NPPES records with a practice address in Castle Rock, and 906 obstetrics & gynecology physician records in Colorado.

All 906 in Colorado → Every provider in Castle Rock → Obstetrics & Gynecology Physician nationwide →

The 8 obstetrics & gynecology physician records with the nearest ZIP codes

  1. Lynn Barta, M.D.Castle Rock, CO 801091851330492
  2. Melanie Carter, M.D.Castle Rock, CO 801091184086472
  3. Caroline Cinquegrani, MDCastle Rock, CO 801091649353251
  4. Kimberly Hildner-Murphy, M.D.Castle Rock, CO 801091033505953
  5. Anna Jones, M.D.Castle Rock, CO 801091295982130
  6. Kenneth Kaplan, MDCastle Rock, CO 801091356412399
  7. Diane Light, MDCastle Rock, CO 801091346879814
  8. Kristen Scogin, MDCastle Rock, CO 801091417210477

Common questions

What is Kassandra Kay McMillen, M.D,'s NPI number?

Kassandra Kay McMillen, M.D,'s National Provider Identifier (NPI) is 1659746477, issued on Dec 4, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Kassandra Kay McMillen, M.D, located?

The NPPES record lists a practice address at 2350 Meadows Blvd, Castle Rock, CO, 80109. Phone: (720) 455-0350. Providers update this record themselves, so call before visiting.

How can I verify Kassandra Kay McMillen, M.D,'s license?

NPPES lists Colorado license number DR0060302, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Kassandra Kay McMillen, M.D, prescribe under Medicare Part D?

In 2024, Kassandra Kay McMillen, M.D, had 124 Medicare Part D claims for 55 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.