Daniel Walter Karlsberg, M.D.
Internal Medicine Physician · Denver, CO
Daniel Walter Karlsberg, M.D. is an internal medicine physician with a practice address in Denver, Colorado, and NPI 1952667883, issued on Apr 4, 2012. Check the license (Colorado DR.0055510, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Daniel Walter Karlsberg
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- DR.0055510 CO
Self-reported in NPPES; status is on the state search - Practice location
- 2525S Downing St, Denver, CO 80210
- Phone
- (303) 715-7184
- Enumerated
- Apr 4, 2012
- Record last updated
- Nov 9, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (303) 765-6228
- Medicare enrollment
- Enrolled (PECOS I20251124000979); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Verify Daniel Walter Karlsberg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0055510Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
49 Medicare Part D claims for 11 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Corazon Medical PCDearborn, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Walter Karlsberg among 2,046 internal medicine physician records in Colorado
Daniel Walter Karlsberg, M.D. 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. Its NPI, issued in 2012, is newer than 72% of them.
- NPI issued2012 · 72% of these records are older, 26% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2012 · median 2006 among the 1,090 with a school on file
- Record last updated2015 · 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).
493 internal medicine physician records list a practice address in Denver
They are 493 of the 25,068 NPPES records with a practice address in Denver, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Denver → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Susanna Coiro, MDDenver, CO 802101548236714
- Amy Ghaibeh, MDDenver, CO 802101396832960
- Jill Goldenberg, MDDenver, CO 802101386662989
- Karen Guzzetta, M.D.Denver, CO 802101558446104
- Edward Ho, MDDenver, CO 802101174587109
- Keith Hruska, M.D.Denver, CO 802101730155490
- Locke Keney, MDDenver, CO 802101245202506
- Jay Krakovitz, M.D.Denver, CO 802101699778936
Common questions
What is Daniel Walter Karlsberg, M.D.'s NPI number?
Daniel Walter Karlsberg, M.D.'s National Provider Identifier (NPI) is 1952667883, issued on Apr 4, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Walter Karlsberg, M.D. located?
The NPPES record lists a practice address at 2525S Downing St, Denver, CO, 80210. Phone: (303) 715-7184. Providers update this record themselves, so call before visiting.
How can I verify Daniel Walter Karlsberg, M.D.'s license?
NPPES lists Colorado license number DR.0055510, 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.
How much does Daniel Walter Karlsberg, M.D. prescribe under Medicare Part D?
In 2024, Daniel Walter Karlsberg, M.D. had 49 Medicare Part D claims for 11 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. 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.