Marc H. Tanenbaum, M. D.
Family Medicine Physician · Longmont, CO
Marc H. Tanenbaum, M. D. is a family medicine physician with a practice address in Longmont, Colorado, and NPI 1891736658, issued on Jun 10, 2006. Check the license (Colorado 18430, as entered in NPPES) on the Colorado Medical Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Marc H. Tanenbaum
- Credential
- M. D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 18430 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1350 Stuart St, Longmont, CO 80501
- Phone
- (303) 776-7300
- Enumerated
- Jun 10, 2006
- Record last updated
- Oct 13, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (303) 776-7308
- Medicaid ID
- 01184308 CO
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,563 in Colorado → Look up another NPI →
Also registered at 1350 Stuart St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephanie Berry-CarterFamily Nurse Practitioner1659589950
- Patrick Cavanaugh, DOFamily Medicine Physician1841214582
Verify Marc H. Tanenbaum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 18430Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Marc H. Tanenbaum among 3,563 family medicine physician records in Colorado
Marc H. Tanenbaum, M. D. is one of 3,563 family medicine physician records with a practice address in Colorado. 76% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 56% newer
- In a Medicare fileNo · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2010 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
73 family medicine physician records list a practice address in Longmont
They are 73 of the 2,381 NPPES records with a practice address in Longmont, and 3,563 family medicine physician records in Colorado. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,563 in Colorado → Every provider in Longmont → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Eric Benson, MDLongmont, CO 805011487658878
- David Britt, MDLongmont, CO 805011427052836
- Catherine Cavender, MDLongmont, CO 805011295739613
- Mary Faini, MDLongmont, CO 805011144222373
- James Freudenburg, MDLongmont, CO 805011710982137
- John Fritz, D.O.Longmont, CO 805011487655478
- Mark Hinman, M.D.Longmont, CO 805011750385415
- Richard Jacobi, MDLongmont, CO 805011639174733
Common questions
What is Marc H. Tanenbaum, M. D.'s NPI number?
Marc H. Tanenbaum, M. D.'s National Provider Identifier (NPI) is 1891736658, issued on Jun 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marc H. Tanenbaum, M. D. located?
The NPPES record lists a practice address at 1350 Stuart St, Longmont, CO, 80501. Phone: (303) 776-7300. Providers update this record themselves, so call before visiting.
How can I verify Marc H. Tanenbaum, M. D.'s license?
NPPES lists Colorado license number 18430, 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. 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.