Mary E. Vierthaler, MD
Nephrology Physician · Longmont, CO
Mary E. Vierthaler, MD is a nephrology physician with a practice address in Longmont, Colorado, and NPI 1972585321, issued on Nov 18, 2005. Check the license (Colorado DR.0040396, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mary E. Vierthaler
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- DR.0040396 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1925 Mountain View Ave FL 3, Longmont, CO 80501
- Phone
- (720) 848-0000
- Enumerated
- Nov 18, 2005
- Record last updated
- Oct 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 20489056 CO
- Medicare enrollment
- Enrolled (PECOS I20110404000327); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Kansas City, School Of Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 182 in Colorado → Look up another NPI →
Also registered at 1925 Mountain View Ave FL 3
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jacob Shirley, PAPhysician Assistant1992463970
Verify Mary E. Vierthaler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0040396Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average nephrology physician in 2024
772 Medicare Part D claims for 143 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Losartan Potassium77 claims
- Amlodipine Besylate74 claims
- Lisinopril53 claims
- Calcitriol46 claims
- Potassium Chloride44 claims
- Atorvastatin Calcium42 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): 97.6 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: $59.20
3 payments; by number, the most common kind was food and beverage; the largest payer was Calliditas Therapeutics US Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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
- University Physicians IncorporatedAurora, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary E. Vierthaler among 182 nephrology physician records in Colorado
Mary E. Vierthaler, MD is one of 182 nephrology physician records with a practice address in Colorado. 81% 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, 72% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1996 · median 2002 among the 133 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Colorado
There are 182 nephrology physician records in Colorado.
All 182 in Colorado → Every provider in Longmont → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Justin Khine, MDLongmont, CO 805011851956486
- Frank Gutmann, M.D., MPHSilverthorne, CO 804981033255195
- Nilesh Ahuja, MDFort Collins, CO 805251750437331
- Sara Burgardt, MDFort Collins, CO 805251144549007
- Ashwin Ganta, M.DFort Collins, CO 805251629229620
- Priyanka GovindanFort Collins, CO 805251245551993
- Jason Merritt, MDFort Collins, CO 805251093704991
- Kevin Muelken, M.D.Fort Collins, CO 805251134116932
Common questions
What is Mary E. Vierthaler, MD's NPI number?
Mary E. Vierthaler, MD's National Provider Identifier (NPI) is 1972585321, issued on Nov 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mary E. Vierthaler, MD located?
The NPPES record lists a practice address at 1925 Mountain View Ave FL 3, Longmont, CO, 80501. Phone: (720) 848-0000. Providers update this record themselves, so call before visiting.
How can I verify Mary E. Vierthaler, MD's license?
NPPES lists Colorado license number DR.0040396, 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 Mary E. Vierthaler, MD prescribe under Medicare Part D?
In 2024, Mary E. Vierthaler, MD had 772 Medicare Part D claims for 143 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Mary E. Vierthaler, MD's MIPS final score?
The 2023 MIPS final score is 97.6 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.