Registry data as of Aug 27, 2026

Periodontics in Colorado

121 NPPES records list periodontics with a Colorado practice address, 2.1 per 100,000 residents, 13 of 51 per resident. Denver and Aurora have the most; each record links to the provider's NPI and the Colorado license search. Page 3 of 3.

CMS NPPES registry, loaded Aug 27, 2026; 2023 Census estimates · NUCC 1223P0300X · method

Denver has the most, 21

Source: CMS NPPES, primary taxonomy 1223P0300X by practice city, loaded Aug 27, 2026.

Periodontics records in Colorado

  1. Nicholas Shumaker, DDS, MSFort Collins, CO 805251619957875
  2. Robert Singiser, D.D.S.Longmont, CO 805011841382579
  3. Ann Somers, D.D.S., M.S.Denver, CO 802031174692602
  4. Kent Spillman, DDSArvada, CO 800031043387020
  5. Norman Stoller, DMDFrisco, CO 804431770709727
  6. Lloyd Thomas, DDSFort Collins, CO 805251649395500
  7. Dennis Thompson, DDSCastle Rock, CO 801081811981962
  8. Ernest Thurber, DDS MSDLittleton, CO 801201336262179
  9. Steven Tilliss, DDS, MSGreenwood Village, CO 801111194754465
  10. Chelsea Twohig, D.D.S.Denver, CO 802221255714861
  11. Annika Van Der Werf, DDSWestminster, CO 802341295396745
  12. Franc Vanderven, DMDLakewood, CO 802271831315936
  13. Kenneth Versman, D.D.S.Aurora, CO 800141427026301
  14. David Walton, DDS, MSFort Collins, CO 805251003886995
  15. Duane Weenig, DDS, MSGrand Junction, CO 815011710011531
  16. Mark Wheeler, D.M.D.Broomfield, CO 800201649258666
  17. Joseph Will, DDS, MSWheat Ridge, CO 800331891795043
  18. Pinelopi XenoudiAurora, CO 800451356519540
  19. Arthur Yagudayev, DDS MDSDenver, CO 802311194148163
  20. Tommy Yun, DDSDenver, CO 802021992864367
  21. Ehsan Zahedi, DDS, MSDParker, CO 801341992338891

Colorado ranks 13 of 51 per resident

  1. Rhode Island2.3
  2. California2.2
  3. Washington2.2
  4. Colorado2.1
  5. Florida2.0
  6. Pennsylvania1.8
  7. 50 states and D.C.1.8

Source: CMS NPPES, primary taxonomy 1223P0300X by practice state, loaded Aug 27, 2026; records per 100,000 residents, 2023 Census estimates.

What the count covers

The CMS National Plan and Provider Enumeration System currently lists 121 Periodontics providers with a primary practice address in Colorado, all registered under the Dentist NUCC taxonomy branch. Each clinician on this roster selected Periodontics as their primary taxonomy at NPI enrollment, a self-reported classification that is updated whenever the provider files a correction with CMS. The count excludes organizations (group practices, hospitals, clinics operate under separate NPIs) and excludes providers who chose a different primary specialty even if they practice Periodontics part-time. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

At 121 enrolled providers, Periodontics in Colorado is a limited-supply market, that matters for search-radius decisions, because patients in Colorado outside the largest metros often need to broaden to adjacent cities to find a local Periodontics clinician. The directory below is paginated 50 providers at a time (3 pages total) and is sorted alphabetically by last name, so scanning for a specific practice usually goes faster than scrolling; on the provider detail page you'll find the full NPPES record including address, phone, credentials, and any published Medicare Part D prescribing activity for 2024.

Before contacting anyone on this list, verify the practice is still at the address shown, NPPES refreshes monthly, but providers who have relocated, retired, or changed employers may not have filed an NPI update yet. Important: PlainDoctor is a directory of publicly available CMS government data covering Periodontics providers in Colorado, not a quality ranking, a board-certification verifier, or medical advice. Always confirm credentials through the NPPES NPI Registry, the Colorado medical board, and, where relevant, the ABMS, AOA, or the specialty's primary certifying body before making any clinical decision. Nothing on this page substitutes for a conversation with a licensed clinician.

States with a similar number

  1. Arizona111
  2. Connecticut110
  3. Georgia146
  4. North Carolina147

States with a similar rate per 100,000

  1. Florida2.0
  2. Washington2.2
  3. California2.2
  4. Rhode Island2.3

The largest states

  1. California863
  2. New York537
  3. Florida450
  4. Texas426
  5. Massachusetts367

Source: CMS National Plan and Provider Enumeration System (NPPES), file loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.