Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Mark L Wiesner , DO

Pediatrics β€’ Estes Park, CO

Active NPI 1154304939 Individual Practitioner Male Practitioner
Practice location in NPPES

122 Stanley Circle Dr
Estes Park, CO 805176302

Call 9706851148 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

122 Stanley Circle Dr

Estes Park, CO 805176302

Telephone 9706851148

30-day fills

11 standardized 30-day fills in 2015

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$73 in 2015

The total cost of these prescriptions in 2015, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2015.

Industry payments (Open Payments)

Fewer than 11 payment records totaling $11.51 in 2021

Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.

These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.

General: payments not tied to research, such as meals, travel, consulting or speaking fees.

A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.

Source: CMS Open Payments, program year 2021.

Guide: How to read an Open Payments record

NPI first issued

2005

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Medicare assignment not listed

CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, β€œDoes your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Wiesner has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Wiesner as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Estes Park and Colorado

Billing and prescribing volume is not a quality rating.

Medicare Part D

Comparisons use 2024 data. The latest CMS data for Dr. Wiesner are from 2015.

2 active clinicians are listed under Pediatrics with a practice address in Estes Park, CO (1,156 in Colorado).

Addresses are self-reported to NPPES and may be out of date.

Sources: CMS Medicare Part D Prescribers (2015), CMS Open Payments (2021), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo Β· Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments Β· Program Year 2021

Program year 2021 (payments made January 1 – December 31, 2021): fewer than 11 records totaling $11.51.

Manufacturer Payment Nature Product Type Amount ($)
Sanofi Pasteur Inc.
Food and Beverage
In-kind items and services
MENQUADFI General $11.51

Source: CMS Open Payments, program year 2021, released June 30, 2026.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2015.

CMS Part D Β· Data Year 2015
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Metoprolol Tartrate Metoprolol Tartrate 11 308 $72.73 β€”

Source: CMS Part D by Provider and Drug, 2015; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2026-06-02
Pediatrics Primary Specialty

NUCC Taxonomy Code: 208000000X

License # reported to NPPES CO 31069

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Colorado Division of Professions and Occupations.
Look Up on State Board Site

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid ID
0725614 (IA)
Medicaid ID
01310697 (CO)
Medicaid ID
107825900 (WY)
Other Identifier Anthem Bcbs
WIA4011 (CO)
Other Identifier Champus
841287602 (CO)

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - PEDIATRIC MEDICINE

Medicare Enrollment ID

I20040322000494

Enrollment State Jurisdiction

CO

PECOS Control ID

6800787771

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

8 Historical Events
πŸ“
Updated Practice Location June 02, 2026

Registered at 122 STANLEY CIRCLE DR, ESTES PARK, CO 805176302 (Tel: 9706851148)

πŸ“
Updated Business Mailing Address June 02, 2026

Registered at 122 STANLEY CIRCLE DR, ESTES PARK, CO 805176302 (Tel: 9706851148)

βœ…
NPI Profile Active August 28, 2013

NPI status registered as active in NPPES database

πŸ“
Practice Location (Initial Record) August 28, 2013

Registered at 555 PROSPECT AVE, ESTES PARK, CO 805176312 (Tel: 9705862200)

πŸ“
Business Mailing Address (Initial Record) August 28, 2013

Registered at 555 PROSPECT AVE, ESTES PARK, CO 805176312 (Tel: 9705862200)

πŸ‘€
Provider Name / Credentials (Initial Record) August 28, 2013

Recorded as MARK WIESNER, D.O.

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) August 28, 2013

Pediatrics (license number reported to NPPES: CO 31069)

🟒
Initial NPI Registration & Enumeration November 25, 2005

First registered as active Individual Practitioner in NPPES Database.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1154304939
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: November 25, 2005
Last Update: June 02, 2026
Sole Proprietor: No

Mailing Address

122 Stanley Circle Dr

Estes Park, CO 805176302

Phone: 9706851148

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.