Herman Hasselkus, M.D.
Geriatric Medicine (Internal Medicine) Physician · Aurora, CO
Herman Hasselkus, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Aurora, Colorado, and NPI 1053481382, issued on Nov 8, 2006. Check the license (Colorado 49496, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Herman Hasselkus
- Credential
- M.D.
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- 49496 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1360 S Potomac St, Aurora, CO 80012
- Phone
- (303) 337-5575
- Enumerated
- Nov 8, 2006
- Record last updated
- Jul 20, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (303) 745-6264
- Medicare enrollment
- Enrolled (PECOS I20110713000659); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 103 in Colorado → Look up another NPI →
Also registered at 1360 S Potomac St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joanne Bader, PAPhysician Assistant1619245867
- David Baez, MDInternal Medicine Physician1407896830
- Devanith Chavez Figueroa, PA-CMedical Physician Assistant1356212187
- Julia Constantine, PA-CPhysician Assistant1083286934
- David Cook, P.A.Internal Medicine Physician1144316183
- Dylan Dick, PA-CPhysician Assistant1881216729
Verify Herman Hasselkus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 49496Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average geriatric medicine (internal medicine) physician in 2024
10,653 Medicare Part D claims for 581 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 583 claims were for opioids.
Most prescribed
- Atorvastatin Calcium983 claims
- Metformin Hcl380 claims
- Farxiga368 claims
- Amlodipine Besylate331 claims
- Lisinopril314 claims
- Losartan Potassium281 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 practice group's MIPS final score for 2023 (Medicare payment program): 72 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,797.35
127 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 1,004 providers of this specialty with any payment received $1,720.82 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
- Mauricio Waintrub, M.D., P.CAurora, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Herman Hasselkus among 103 geriatric medicine (internal medicine) physician records in Colorado
Herman Hasselkus, M.D. is one of 103 geriatric medicine (internal medicine) physician records with a practice address in Colorado. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1996 · median 1998 among the 51 with a school on file
- Record last updated2012 · 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 207RG0300X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in Colorado
There are 103 geriatric medicine (internal medicine) physician records in Colorado.
All 103 in Colorado → Every provider in Aurora → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Ivy Issa, M.D.Aurora, CO 800121891796165
- Michael Wasserman, M.D.Aurora, CO 800121992748537
- Emily Rogers, M.D.Aurora, CO 800111316334295
- Paul Wright, M.D.Aurora, CO 800111700950615
- Jill Christy, M.D.Aurora, CO 800141992876601
- Bobaker Elalem, M.D.( MB BCH)Aurora, CO 800141245523539
- Courtney Hall, MDAurora, CO 800141043431356
- Lisa Kasten Price, MD FACPAurora, CO 800101316960347
Common questions
What is Herman Hasselkus, M.D.'s NPI number?
Herman Hasselkus, M.D.'s National Provider Identifier (NPI) is 1053481382, issued on Nov 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Herman Hasselkus, M.D. located?
The NPPES record lists a practice address at 1360 S Potomac St, Aurora, CO, 80012. Phone: (303) 337-5575. Providers update this record themselves, so call before visiting.
How can I verify Herman Hasselkus, M.D.'s license?
NPPES lists Colorado license number 49496, 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 Herman Hasselkus, M.D. prescribe under Medicare Part D?
In 2024, Herman Hasselkus, M.D. had 10,653 Medicare Part D claims for 581 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. Part D covers Medicare prescriptions only.
What is Herman Hasselkus, M.D.'s MIPS final score?
The 2023 MIPS final score is 72 of 100, reported for the practice group. 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.