Hartmut Koelsch, MD
Internal Medicine Physician · Longmont, CO
Hartmut Koelsch, MD is an internal medicine physician with a practice address in Longmont, Colorado, and NPI 1881699551, issued on Jun 17, 2005. Check the license (Colorado 21911, as entered in NPPES) on the Colorado Medical Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Hartmut Koelsch
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 21911 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1925 W Mountain View Ave, Longmont, CO 80501
- Phone
- (303) 776-1234
- Enumerated
- Jun 17, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (720) 494-3107
- Medicaid ID
- 01219112 CO
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 1925 W Mountain View Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Hartmut Koelsch in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 21911Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Hartmut Koelsch among 2,046 internal medicine physician records in Colorado
Hartmut Koelsch, MD is one of 2,046 internal medicine physician records with a practice address in Colorado. 71% 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileNo · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2026 · 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 207R00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
45 internal medicine physician records list a practice address in Longmont
They are 45 of the 2,381 NPPES records with a practice address in Longmont, and 2,046 internal medicine physician records in Colorado. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,046 in Colorado → Every provider in Longmont → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Marie Bush, MDLongmont, CO 805011467456889
- Laird Cagan, MDLongmont, CO 805011285715532
- Wendy CarleLongmont, CO 805011548397508
- Reginald Guy, MDLongmont, CO 805011528063849
- Peter Holt, MDLongmont, CO 805011104907450
- Tana Levine, MDLongmont, CO 805011831161108
- Holly Lewis, MDLongmont, CO 805011093896342
- David McCarty, DOLongmont, CO 805011174521058
Common questions
What is Hartmut Koelsch, MD's NPI number?
Hartmut Koelsch, MD's National Provider Identifier (NPI) is 1881699551, issued on Jun 17, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Hartmut Koelsch, MD located?
The NPPES record lists a practice address at 1925 W Mountain View Ave, Longmont, CO, 80501. Phone: (303) 776-1234. Providers update this record themselves, so call before visiting.
How can I verify Hartmut Koelsch, MD's license?
NPPES lists Colorado license number 21911, 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.