Mark Led Grebener, LCSW LAC
Clinical Social Worker · Littleton, CO
Mark Led Grebener, LCSW LAC is a clinical social worker with a practice address in Littleton, Colorado, and NPI 1558462481, issued on Sep 25, 2006. Check the license (Colorado CSW 434, as entered in NPPES) with the Colorado board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Led Grebener
- Credential
- LCSW LAC
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License numbers
- CSW 434 CO
LAC 127 CO
Self-reported in NPPES; status is on the state search - Practice location
- 5574 S Prince St, Littleton, CO 80120
- Phone
- (303) 883-4808
- Enumerated
- Sep 25, 2006
- Record last updated
- Sep 11, 2025
- Fax
- (303) 794-6736
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 7,356 in Colorado → Look up another NPI →
Verify Mark Led Grebener in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Colorado board licenses this profession
Search for license CSW 434Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Led Grebener among 7,356 clinical social worker records in Colorado
Mark Led Grebener, LCSW LAC is one of 7,356 clinical social worker records with a practice address in Colorado. 14% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than under 1% of them.
- NPI issued2006 · under 1% of these records are older, 92% newer
- In a Medicare fileNo · 14% of these records are
- In the CMS Doctors and Clinicians fileNo · 21% of these records are
- Record last updated2025 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
266 clinical social worker records list a practice address in Littleton
They are 266 of the 3,918 NPPES records with a practice address in Littleton, and 7,356 clinical social worker records in Colorado. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,356 in Colorado → Every provider in Littleton → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Erin Bennetts, LCSWLittleton, CO 801201801806302
- Melissa BortnemLittleton, CO 801201619029170
- Grant Cannizzaro, MSWLittleton, CO 801201871661058
- Sarah Clark, LCSWLittleton, CO 801201164574091
- Sharon Deguevara, LCSWLittleton, CO 801201174674311
- Ann Fleming, LCSWLittleton, CO 801201336207380
- Virginia Lee, LCSWLittleton, CO 801201922151307
- David Mallo, LCSWLittleton, CO 801201760545255
Common questions
What is Mark Led Grebener, LCSW LAC's NPI number?
Mark Led Grebener, LCSW LAC's National Provider Identifier (NPI) is 1558462481, issued on Sep 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Led Grebener, LCSW LAC located?
The NPPES record lists a practice address at 5574 S Prince St, Littleton, CO, 80120. Phone: (303) 883-4808. Providers update this record themselves, so call before visiting.
How can I verify Mark Led Grebener, LCSW LAC's license?
NPPES lists Colorado license number CSW 434, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity 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. An NPI identifies who bills; it is not a license.
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.