Mary Vierthaler, MD
NPI 1972585321 · Nephrology Physician · Longmont, CO
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Vierthaler, MD is a Nephrology Physician provider in Longmont, CO (NPI 1972585321).
Provider details
- NPI number
- 1972585321
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- DR.0040396 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
344 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 225 | $180 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 48 | $129 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 43 | $217 |
| Manual Urinalysis Test With Examination Using Microscope, Non-Automated81000 | 28 | $4 |
Typical Medicare-allowed amounts for these services range $4–$217 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 77 | 20 |
| Amlodipine Besylate | 74 | 23 |
| Lisinopril | 53 | 21 |
| Calcitriol | 46 | 17 |
| Potassium Chloride | 44 | 15 |
| Atorvastatin Calcium | 42 | 14 |
| Furosemide | 38 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$59 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1606 Prairie Center PkwySuite 340Brighton, CO 80601-4004Phone: (303) 219-5013Fax: (303) 219-5017
Registry dates
- Enumerated
- 2005-11-18
- Last updated
- 2021-10-06
- Certified
- 2021-10-06
Frequently asked questions
- What is Mary Vierthaler's NPI number?
- Mary Vierthaler's National Provider Identifier (NPI) is 1972585321, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Vierthaler's specialty?
- Mary Vierthaler is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Vierthaler located?
- Mary Vierthaler's practice location on file with NPPES is 1925 Mountain View Ave Fl 3, Longmont, CO 80501-3128.
- What is Mary Vierthaler's phone number?
- The practice phone number listed in the NPPES registry for Mary Vierthaler is (720) 848-0000.
- Does Mary Vierthaler accept Medicare?
- Mary Vierthaler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Vierthaler's NPI active?
- Yes — Mary Vierthaler's NPI (1972585321) is active in the NPPES registry as of the last update on 2021-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.