Bryan C. Gieszl, MD
Internal Medicine Physician · Aspen, CO
Bryan C. Gieszl, MD is an internal medicine physician with a practice address in Aspen, Colorado, and NPI 1881644649, issued on May 11, 2006. Check the license (Colorado 44470, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Bryan C. Gieszl
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 44470 CO
Self-reported in NPPES; status is on the state search - Practice location
- 101 Founders PL Ste 109, Aspen, CO 81611
- Phone
- (970) 920-0104
- Enumerated
- May 11, 2006
- Record last updated
- Nov 21, 2025
- Fax
- (970) 920-0124
- Medicaid ID
- 57428361 CO
- Medicare enrollment
- Enrolled (PECOS I20060627000325); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 101 Founders PL Ste 109
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Haley Hoffman, DOFamily Medicine Physician1780188490
Verify Bryan C. Gieszl in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 44470Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average internal medicine physician in 2024
3,311 Medicare Part D claims for 412 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 269 claims were for opioids.
Most prescribed
- Atorvastatin Calcium256 claims
- Levothyroxine Sodium135 claims
- Zolpidem Tartrate133 claims
- Oxycodone Hcl117 claims
- Lisinopril91 claims
- Gabapentin89 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.
The MIPS final score for 2023 (Medicare payment program): 5.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $185.75
8 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer 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 2 group practices
- Aspen Medical Care, PCAspen, CO
- Aspen Valley Hospital Clinics, PLLCAspen, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
9 internal medicine physician records list a practice address in Aspen
They are 9 of the 301 NPPES records with a practice address in Aspen, and 2,046 internal medicine physician records in Colorado.
All 9 in Aspen → All 2,046 in Colorado → Every provider in Aspen →
Other internal medicine physician records in Colorado
- Emily Aaron, MDDenver, CO1205256971
- David Abbey, MS MDFort Collins, CO1568483196
- Tyler Abbey, DOGreeley, CO1730572694
- Sahar Abdelqader, MDLongmont, CO1366600710
- Ahmed Abdulrahman, MDPueblo, CO1093425068
- Durant Abernethy, M.D.Frisco, CO1427289040
- Alan Aboaf, MDCentennial, CO1003866393
- Adam Abraham, MDAurora, CO1720178304
- Phebe Abraham, MDGreeley, CO1558980540
- Richard Abrams, M.D.Denver, CO1174645386
Common questions
What is Bryan C. Gieszl, MD's NPI number?
Bryan C. Gieszl, MD's National Provider Identifier (NPI) is 1881644649, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Bryan C. Gieszl, MD located?
The NPPES record lists a practice address at 101 Founders PL Ste 109, Aspen, CO, 81611. Phone: (970) 920-0104. Providers update this record themselves, so call before visiting.
How can I verify Bryan C. Gieszl, MD's license?
NPPES lists Colorado license number 44470, 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 Bryan C. Gieszl, MD prescribe under Medicare Part D?
In 2024, Bryan C. Gieszl, MD had 3,311 Medicare Part D claims for 412 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Bryan C. Gieszl, MD's MIPS final score?
The 2023 MIPS final score is 5.8 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.