Dr. Brigid O'holleran , MD
Surgery • Durango, CO
1 Mercado St Ste 220
Durango, CO 813017310
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on April 25, 2012; this date does not establish years in practice.
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Published CMS data list 62 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99203 — New patient outpatient office visit: 23 service units.
- 99204 — New patient outpatient office visit: 15 service units.
- 99213 — Established patient outpatient office visit: 13 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 4 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 17 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) — 17 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 80% of clinicians listed under Surgery in Colorado (2024, 291 clinicians with data). Median for this group: 141. Middle half: 80 to 240.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 76 in 2020 to 62 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
1 Mercado St Ste 220
Durango, CO 813017310
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Valley View Hospital Association. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of Nebraska College Of Medicine
2012
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
99 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $8,116 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $5,960 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
17 standardized 30-day fills in 2024
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
$54 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
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, 2024.
Open Payments general payments, program year 2025
All general payments: $663.30 across 4 records.
By nature of payment
- Travel and Lodging: $628.41 across 2 records.
- Food and Beverage: $34.89 across 2 records.
Reporting-company totals
- HOLOGIC INC: $628.41 across 2 records.
- Myriad Genetic Laboratories, Inc.: $20.15 across 1 record.
- HOLOGIC INC: $14.74 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
14 years (graduated 2012)
CMS Doctors and Clinicians data list 2012 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2012
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.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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, “Does your provider accept Medicare as full payment?”
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.
Enrolled in Medicare (PECOS)
Dr. O'Holleran 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.
Can order Medicare-covered services
CMS lists Dr. O'Holleran 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.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
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.
Compared with the same specialty in Durango and Colorado
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 80% of clinicians listed under Surgery in Colorado (2024, 291 clinicians with data). Median for this group: 141. Middle half: 80 to 240.
Too few clinicians listed under Surgery in Durango have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A lower Medicare-allowed amount than 80% of clinicians listed under Surgery in Colorado (2024, 291 clinicians with data). Median for this group: $21,211. Middle half: $10,645 to $37,244.
Too few clinicians listed under Surgery in Durango have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 80% of clinicians listed under Surgery in Colorado (2024, 291 clinicians with data). Median for this group: $16,344. Middle half: $8,128 to $29,463.
Too few clinicians listed under Surgery in Durango have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Fewer Part D prescriptions than 85% of clinicians listed under Surgery in Colorado (2024, 264 clinicians with data). Median for this group: 42. Middle half: 26 to 80.
Too few clinicians listed under Surgery in Durango have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 85% of clinicians listed under Surgery in Colorado (2024, 264 clinicians with data). Median for this group: $230. Middle half: $92 to $633.
Too few clinicians listed under Surgery in Durango have Medicare Part D data for 2024 to compare.
7 active clinicians are listed under Surgery with a practice address in Durango, CO (608 in Colorado).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 18% from 76 in 2020 to 62 in 2024.
- 2020: 76
- 2021: 108
- 2022: 76
- 2023: 176
- 2024: 62
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Medicare-allowed amount
Medicare-allowed amount varied from year to year: $8,110 in 2020 and $8,116 in 2024.
- 2020: $8,110
- 2021: $12,777
- 2022: $12,551
- 2023: $29,395
- 2024: $8,116
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Paid by Medicare
Paid by Medicare varied from year to year: $6,253 in 2020 and $5,960 in 2024.
- 2020: $6,253
- 2021: $9,618
- 2022: $8,675
- 2023: $22,673
- 2024: $5,960
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 18 in 2020 to 17 in 2024.
- 2020: 18
- 2021: 28
- 2022: 40
- 2023: 71
- 2024: 17
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30-day fills
30-day fills went from 18 in 2020 to 17 in 2024.
- 2020: 18
- 2021: 28
- 2022: 40
- 2023: 71
- 2024: 17
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Part D drug cost
Part D drug cost went from $76 in 2020 to $54 in 2024.
- 2020: $76
- 2021: $127
- 2022: $150
- 2023: $279
- 2024: $54
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 69% from $2,119.93 in 2019 to $663.30 in 2025.
- 2019: $2,119.93
- 2020: $47.57
- 2021: $6,000.00
- 2024: $3,052.86
- 2025: $663.30
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $663.30.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| HOLOGIC INC |
Travel and Lodging
In-kind items and services
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Localizer | General | $317.04 |
| HOLOGIC INC |
Travel and Lodging
In-kind items and services
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— | General | $311.37 |
| Myriad Genetic Laboratories, Inc. |
Food and Beverage
In-kind items and services
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MYRISK | General | $20.15 |
| HOLOGIC INC |
Food and Beverage
In-kind items and services
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Magseed | General | $14.74 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2017–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2018–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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23 | 23 | $414.00 | $109.68 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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15 | 15 | $615.00 | $168.28 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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13 | 12 | $336.00 | $91.66 |
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99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
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11 | 11 | $714.00 | $170.72 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 17 | 49 | $54.05 | 17 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
NUCC Taxonomy Code: 390200000X
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL SURGERY
I20170815000182
CO
9234362328
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Valley View Hospital Association
1906 Blake Ave, Glenwood Spgs, CO 816014227
Phone: 9703847105
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Surgery
Doctor of Medicine (M.D.)
Surgery
Doctor of Osteopathic Medicine (D.O.)
Surgery
Doctor of Medicine (M.D.)
Surgery
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
NPI status registered as active in NPPES database
Registered at 1 MERCADO ST STE 220, DURANGO, CO 813017310 (Tel: 9707643450)
Registered at 30 N 1900 E, RM 3B324, SALT LAKE CITY, UT 841320002
Recorded as BRIGID O'HOLLERAN, M.D.
Surgery (license number reported to NPPES: CO DR.0058708)
NPI status registered as active in NPPES database
Registered at 30 N 1900 E, RM 3B324, SALT LAKE CITY, UT 841320002 (Tel: 8015816803)
Registered at 30 N 1900 E, RM 3B324, SALT LAKE CITY, UT 841320002
Recorded as BRIGID O'HOLLERAN, M.D.
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery Specialists in Durango
- Dr. Charles Black, MD
- Dr. Frank Quayle, MD
- Dr. Robert Wrona, MD
- Dr. Rizwan Ahmed, MD
- Dr. Helen Kay, DO
Mailing Address
30 N 1900 E, Rm 3b324
Salt Lake City, UT 841320002