William Gerard Welker , MS, PA-C
Physician Assistant • Monument, CO
4620 Redstone Ridge Rd
Monument, CO 801328265
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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William Welker is listed in NPPES under Physician Assistant.
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NPI assigned on March 10, 2006; this date does not establish years in practice.
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Published CMS data list 104 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:
- 99285 — Emergency department visit with high level of medical decision making: 33 service units.
- 93010 — Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only: 28 service units.
- 99284 — Emergency department visit with moderate level of medical decision making: 28 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 11 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:
- Prednisone — 11 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 65% of clinicians listed under Physician Assistant in Colorado (2024, 1,650 clinicians with data). Median for this group: 195. Middle half: 68 to 513.
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 387 in 2020 to 104 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
4620 Redstone Ridge Rd
Monument, CO 801328265
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
1995
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
87 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 $8,568 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 $6,423 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
11 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
$30 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021–2025.
Years since graduation
31 years (graduated 1995)
CMS Doctors and Clinicians data list 1995 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, CMS release of October 2, 2026.
NPI first issued
2006
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, CMS release of October 2, 2026; 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, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
William Welker 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 William Welker 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 Monument and Colorado
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 65% of clinicians listed under Physician Assistant in Colorado (2024, 1,650 clinicians with data). Median for this group: 195. Middle half: 68 to 513.
Too few clinicians listed under Physician Assistant in Monument have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A lower Medicare-allowed amount than 65% of clinicians listed under Physician Assistant in Colorado (2024, 1,650 clinicians with data). Median for this group: $15,592. Middle half: $6,265 to $34,911.
Too few clinicians listed under Physician Assistant in Monument have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 65% of clinicians listed under Physician Assistant in Colorado (2024, 1,650 clinicians with data). Median for this group: $11,327. Middle half: $4,673 to $25,633.
Too few clinicians listed under Physician Assistant in Monument have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Fewer Part D prescriptions than 95% of clinicians listed under Physician Assistant in Colorado (2024, 2,044 clinicians with data). Median for this group: 194. Middle half: 63 to 624.
Too few clinicians listed under Physician Assistant in Monument have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 95% of clinicians listed under Physician Assistant in Colorado (2024, 2,044 clinicians with data). Median for this group: $3,374. Middle half: $573 to $55,248.
Too few clinicians listed under Physician Assistant in Monument have Medicare Part D data for 2024 to compare.
5 active clinicians are listed under Physician Assistant with a practice address in Monument, CO (3,800 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 73% from 387 in 2020 to 104 in 2024.
- 2020: 387
- 2021: 397
- 2022: 303
- 2023: 184
- 2024: 104
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Medicare-allowed amount
Medicare-allowed amount decreased 68% from $26,553 in 2020 to $8,568 in 2024.
- 2020: $26,553
- 2021: $28,148
- 2022: $23,557
- 2023: $15,477
- 2024: $8,568
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Paid by Medicare
Paid by Medicare decreased 68% from $19,813 in 2020 to $6,423 in 2024.
- 2020: $19,813
- 2021: $21,053
- 2022: $17,958
- 2023: $11,160
- 2024: $6,423
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 52% from 23 in 2020 to 11 in 2024.
- 2020: 23
- 2021: 63
- 2022: 46
- 2023: 20
- 2024: 11
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30-day fills
30-day fills decreased 52% from 23 in 2020 to 11 in 2024.
- 2020: 23
- 2021: 63
- 2022: 46
- 2023: 20
- 2024: 11
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Part D drug cost
Part D drug cost went from $237 in 2020 to $30 in 2024.
- 2020: $237
- 2021: $335
- 2022: $275
- 2023: $215
- 2024: $30
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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, 2017–2024; 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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99285
Emergency department visit with high level of medical decision making
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33 | 32 | $1036.73 | $141.74 |
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93010
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
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28 | 26 | $56.14 | $6.80 |
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99284
Emergency department visit with moderate level of medical decision making
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28 | 28 | $681.57 | $100.53 |
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99283
Emergency department visit with low level of medical decision making
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15 | 15 | $400.33 | $59.03 |
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 |
|---|---|---|---|---|---|
| Prednisone | Prednisone | 11 | 59 | $29.56 | 11 |
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
Self-certified to NPPES: 2021-05-04NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20100514000083
CO
8628010576
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
Registered at 4620 REDSTONE RIDGE RD, MONUMENT, CO 801328265 (Tel: 5618188031)
Registered at 9888 W BELLEVIEW AVE # 5114, DENVER, CO 801232101 (Tel: 8444666829)
Physician Assistant (license number reported to NPPES: CO PA2919)
NPI status registered as active in NPPES database
Registered at 7845 SE MAMMOTH DR, HOBE SOUND, FL 334557893 (Tel: 5618188031)
Registered at 901 45TH ST, WEST PALM BEACH, FL 334072413
Recorded as WILLIAM WELKER, MS, PA-C
Physician Assistant (license number reported to NPPES: FL PA3011)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
9888 W Belleview Ave # 5114
Denver, CO 801232101
Phone: 8444666829