Daniel Witten, MD
Internal Medicine Physician · Denver, CO
Daniel Witten, MD is an internal medicine physician with a practice address in Denver, Colorado, and NPI 1245233782, issued on May 28, 2005. Check the license (Colorado 40778, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Daniel Witten
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 40778 CO
Self-reported in NPPES; status is on the state search - Practice location
- 4500 E 9TH Ave, Denver, CO 80220
- Phone
- (303) 394-2152
- Enumerated
- May 28, 2005
- Record last updated
- Nov 10, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (303) 394-2496
- Medicaid ID
- 28482379 CO
- Medicare enrollment
- Enrolled (PECOS I20091207000139); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 4500 E 9TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Daniel Witten in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 40778Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% more Medicare Part D claims than the average internal medicine physician in 2024
5,200 Medicare Part D claims for 248 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 147 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium314 claims
- Levothyroxine Sodium242 claims
- Lisinopril200 claims
- Atorvastatin Calcium180 claims
- Losartan Potassium178 claims
- Amlodipine Besylate152 claims
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.
Industry payments in 2024: $709.02
34 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Ninth Avenue Internal Medicine LLCDenver, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Witten among 2,046 internal medicine physician records in Colorado
Daniel Witten, 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. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1995 · median 2006 among the 1,090 with a school on file
- Record last updated2009 · 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 →
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Common questions
What is Daniel Witten, MD's NPI number?
Daniel Witten, MD's National Provider Identifier (NPI) is 1245233782, issued on May 28, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Witten, MD located?
The NPPES record lists a practice address at 4500 E 9TH Ave, Denver, CO, 80220. Phone: (303) 394-2152. Providers update this record themselves, so call before visiting.
How can I verify Daniel Witten, MD's license?
NPPES lists Colorado license number 40778, 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 Witten, MD prescribe under Medicare Part D?
In 2024, Daniel Witten, MD had 5,200 Medicare Part D claims for 248 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.