Isaac J. Klostermann, PA-C
Physician Assistant · Montrose, CO
Isaac J. Klostermann, PA-C is a physician assistant with a practice address in Montrose, Colorado, and NPI 1386996080, issued on Oct 5, 2012. Check the license (Colorado PA.0003531, as entered in NPPES) with the Colorado board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Isaac J. Klostermann
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA.0003531 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1010 S Rio Grande Ave, Montrose, CO 81401
- Phone
- (970) 497-3333
- Enumerated
- Oct 5, 2012
- Record last updated
- Apr 20, 2026
- Fax
- (855) 299-7837
- Medicaid ID
- 63020254 CO
- Medicare enrollment
- Enrolled (PECOS I20130222000139); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1010 S Rio Grande Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrew Astin, DOPediatrics Physician1194285650
- Erica Balkcum, PACPhysician Assistant1558834747
- Juancarlos Bermudez, PA-CPhysician Assistant1770255697
- Cory JenkinsSocial Worker1427761212
- Donna Jin, MDFamily Medicine Physician1346739653
- Karl Kamm, PA-CPhysician Assistant1811123474
Verify Isaac J. Klostermann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Colorado board licenses this profession
Search for license PA.0003531Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.5 times the Medicare Part D claims of the average physician assistant in 2024
3,766 Medicare Part D claims for 295 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 141 claims were for opioids.
Most prescribed
- Levothyroxine Sodium179 claims
- Lisinopril159 claims
- Atorvastatin Calcium152 claims
- Fluticasone Propionate93 claims
- Losartan Potassium89 claims
- Metformin Hcl87 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: $474.72
25 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 64,719 providers of this specialty with any payment received $841.65 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
- Olathe Community Clinic IncOlathe, CO
- Peak Family Medicine LLCMontrose, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
22 physician assistant records list a practice address in Montrose
They are 22 of the 757 NPPES records with a practice address in Montrose, and 3,767 physician assistant records in Colorado.
All 22 in Montrose → All 3,767 in Colorado → Every provider in Montrose →
Other physician assistant records in Colorado
- Hannah Abbe, PADenver, CO1083360184
- Brianna Abbott, PA-CColorado Springs, CO1013366905
- Elise AbbottFort Collins, CO1194516542
- Jennifer Abbott, PA-CColorado Springs, CO1851821334
- Timothy Abbott, PA-CDenver, CO1023152212
- Alexander AbbruzzeseFort Carson, CO1538994132
- Mary Abraham, PA-CColorado Springs, CO1225696800
- Mariella Accame, PALakewood, CO1629007141
- Valerie Ackman, PA-CEnglewood, CO1982824504
- Megan Acosta O'GaraPueblo, CO1083390736
Common questions
What is Isaac J. Klostermann, PA-C's NPI number?
Isaac J. Klostermann, PA-C's National Provider Identifier (NPI) is 1386996080, issued on Oct 5, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Isaac J. Klostermann, PA-C located?
The NPPES record lists a practice address at 1010 S Rio Grande Ave, Montrose, CO, 81401. Phone: (970) 497-3333. Providers update this record themselves, so call before visiting.
How can I verify Isaac J. Klostermann, PA-C's license?
NPPES lists Colorado license number PA.0003531, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity only.
How much does Isaac J. Klostermann, PA-C prescribe under Medicare Part D?
In 2024, Isaac J. Klostermann, PA-C had 3,766 Medicare Part D claims for 295 beneficiaries; the average among physician assistant prescribers was 830. 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.