NPPES file of Aug 9, 2026

Sandy Cole Marks, M.D.

Anesthesiology Physician · Fort Collins, CO

Sandy Cole Marks, M.D. is an anesthesiology physician with a practice address in Fort Collins, Colorado, and NPI 1265420087, issued on Oct 6, 2005. Check the license (Colorado DR.0037167, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1265420087
Name
Sandy Cole Marks
Credential
M.D.
Primary taxonomy
Anesthesiology Physician 207L00000X
License number
DR.0037167 CO
Self-reported in NPPES; status is on the state search
Practice location
1236 E Elizabeth St, Fort Collins, CO 80524
Phone
(970) 224-2985
Enumerated
Oct 6, 2005
Record last updated
Jun 7, 2013 (not updated in 13 years: call before relying on the address or phone)
Fax
(970) 472-9381
Medicaid IDs
113845600 WY
50087894 CO
Medicare enrollment
Enrolled (PECOS I20100923001335); accepts Medicare assignment
Medical or professional school
University Of Massachusetts Medical School, 1992
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 anesthesiology physician records → All 1,202 in Colorado → Look up another NPI →

Also registered at 1236 E Elizabeth St

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

  1. Ryan Adams, MDAnesthesiology Physician1154448611
  2. Richard Alessi, M.D.Anesthesiology Physician1063409860
  3. Ian Anderson, M.D.Anesthesiology Physician1629277678
  4. Brook Arnold, M.D.Anesthesiology Physician1235369927
  5. Derick Beiswanger, CRNACertified Registered Nurse Anesthetist1952728297
  6. Richard Bindseil, D.O.Anesthesiology Physician1003850165

Verify Sandy Cole Marks in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersColorado Medical Board
    Search for license DR.0037167    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Northern Colorado Anesthesia Professionals PLLCFort Collins, CO

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

Sandy Cole Marks among 1,202 anesthesiology physician records in Colorado

Sandy Cole Marks, M.D. is one of 1,202 anesthesiology physician records with a practice address in Colorado. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 87% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated1992 · median 2006 among the 824 with a school on file
  • Record last updated2013 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Anesthesiology Physician providers in Colorado

There are 1,202 anesthesiology physician records in Colorado.

All 1,202 in Colorado → Every provider in Fort Collins → Anesthesiology Physician nationwide →

The 8 anesthesiology physician records with the nearest ZIP codes

  1. Richard Alessi, M.D.Fort Collins, CO 805241063409860
  2. Russell Bobo, M.D.Fort Collins, CO 805241972591733
  3. Marylida Carline, M.D.Fort Collins, CO 805241225026099
  4. Thomas Cochran, M.D.Fort Collins, CO 805241154319879
  5. Michael Deringer, M.D.Fort Collins, CO 805241386632156
  6. James Derrisaw, M.D.Fort Collins, CO 805241710975586
  7. Duane Dunn, M.D.Fort Collins, CO 805241033107818
  8. Troy Ford, M.D.Fort Collins, CO 805241477541258

Common questions

What is Sandy Cole Marks, M.D.'s NPI number?

Sandy Cole Marks, M.D.'s National Provider Identifier (NPI) is 1265420087, issued on Oct 6, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Sandy Cole Marks, M.D. located?

The NPPES record lists a practice address at 1236 E Elizabeth St, Fort Collins, CO, 80524. Phone: (970) 224-2985. Providers update this record themselves, so call before visiting.

How can I verify Sandy Cole Marks, M.D.'s license?

NPPES lists Colorado license number DR.0037167, 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.

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.