Jan S Williams , ACNP, APRN, BC
Nurse Practitioner โข Manassas, VA
8640 Sudley Rd Ste 302
Manassas, VA 201104404
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 December 11, 2006; this date does not establish years in practice.
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Published CMS data list 26 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99233 โ Subsequent hospital care with moderate levelof medical decision making: 26 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 60 Medicare Part D prescriptions, including refills, in 2020.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2020. Published rows only; this is not a quality measure.
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Published Part D records, 2020:
- Clopidogrel (Clopidogrel Bisulfate) โ 28 prescription fills, including refills.
- Atorvastatin Calcium โ 16 prescription fills, including refills.
- Eliquis (Apixaban) โ 16 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2020. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 95% of clinicians listed under Nurse Practitioner in Manassas, VA (2024, 21 clinicians with data). Median for this group: 371. Middle half: 154 to 567.
Fewer Medicare Part B services than 90% of clinicians listed under Nurse Practitioner in Virginia (2024, 695 clinicians with data). Median for this group: 285. Middle half: 106 to 725.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 128 in 2019 to 26 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2019โ2024.
Practice Location & Contact Primary Location
8640 Sudley Rd Ste 302
Manassas, VA 201104404
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Manassas, VA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Uva Community Health Medical Group Llc. 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
Georgetown University School Of Medicine
2005
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
44 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 โ by Provider, 2024.
Medicare-allowed amount
About $2,591 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 โ by Provider and Service, 2024.
Paid by Medicare
About $2,082 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 โ by Provider and Service, 2024.
30-day fills
106 standardized 30-day fills in 2020
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
$9,401 in 2020
The total cost of these prescriptions in 2020, 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 โ by Provider and Drug, 2020.
Open Payments general payments, program year 2025
All general payments: $136.56 across 2 records.
By nature of payment
- Food and Beverage: $136.56 across 2 records.
Reporting-company totals
- Boehringer Ingelheim Pharmaceuticals, Inc.: $117.00 across 1 record.
- ABIOMED: $19.56 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
21 years (graduated 2005)
CMS Doctors and Clinicians data list 2005 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
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; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
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)
Jan Williams 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 Jan Williams 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 Manassas and Virginia
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 95% of clinicians listed under Nurse Practitioner in Manassas, VA (2024, 21 clinicians with data). Median for this group: 371. Middle half: 154 to 567.
Fewer Medicare Part B services than 90% of clinicians listed under Nurse Practitioner in Virginia (2024, 695 clinicians with data). Median for this group: 285. Middle half: 106 to 725.
Medicare-allowed amount
A lower Medicare-allowed amount than 95% of clinicians listed under Nurse Practitioner in Manassas, VA (2024, 21 clinicians with data). Median for this group: $30,630. Middle half: $12,635 to $45,674.
A lower Medicare-allowed amount than 90% of clinicians listed under Nurse Practitioner in Virginia (2024, 695 clinicians with data). Median for this group: $22,840. Middle half: $9,806 to $51,372.
Paid by Medicare
A lower Medicare payment amount than 95% of clinicians listed under Nurse Practitioner in Manassas, VA (2024, 21 clinicians with data). Median for this group: $22,129. Middle half: $9,984 to $36,222.
A lower Medicare payment amount than 90% of clinicians listed under Nurse Practitioner in Virginia (2024, 695 clinicians with data). Median for this group: $17,006. Middle half: $7,204 to $38,055.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Jan Williams are from 2020.
37 active clinicians are listed under Nurse Practitioner with a practice address in Manassas, VA (1,722 in Virginia).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Manassas
10.8% of these 37 clinicians have the CMS telehealth indicator.
64.9% of these 37 clinicians are listed by CMS as accepting Medicare assignment.
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 80% from 128 in 2019 to 26 in 2024.
- 2019: 128
- 2021: 39
- 2022: 37
- 2023: 33
- 2024: 26
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Medicare-allowed amount
Medicare-allowed amount decreased 61% from $6,625 in 2019 to $2,591 in 2024.
- 2019: $6,625
- 2021: $3,602
- 2022: $1,979
- 2023: $2,200
- 2024: $2,591
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Paid by Medicare
Paid by Medicare decreased 54% from $4,533 in 2019 to $2,082 in 2024.
- 2019: $4,533
- 2021: $2,890
- 2022: $1,573
- 2023: $1,700
- 2024: $2,082
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 11 in 2016 to 60 in 2020.
- 2016: 11
- 2017: 24
- 2018: 104
- 2019: 80
- 2020: 60
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30-day fills
30-day fills went from 11 in 2016 to 106 in 2020.
- 2016: 11
- 2017: 24
- 2018: 144
- 2019: 133
- 2020: 106
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Part D drug cost
Part D drug cost increased 173% from $3,438 in 2016 to $9,401 in 2020.
- 2016: $3,438
- 2017: $3,583
- 2018: $8,359
- 2019: $972
- 2020: $9,401
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $93.88 in 2021 to $136.56 in 2025.
- 2021: $93.88
- 2022: $286.81
- 2023: $292.37
- 2024: $5.78
- 2025: $136.56
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2020), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท 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 โ December 31, 2025): fewer than 11 records totaling $136.56.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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JARDIANCE | General | $117.00 |
| ABIOMED |
Food and Beverage
In-kind items and services
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โ | General | $19.56 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2017โ2023 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 โ by Provider and Service data, 2018โ2024; 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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99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
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26 | 25 | $236.00 | $99.67 |
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 2020.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Clopidogrel | Clopidogrel Bisulfate | 28 | 1,620 | $330.56 | โ |
| Atorvastatin Calcium | Atorvastatin Calcium | 16 | 1,020 | $185.01 | โ |
| Eliquis | Apixaban | 16 | 540 | $8,885.81 | โ |
Source: CMS Part D by Provider and Drug, 2020; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-02-18NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NURSE PRACTITIONER
I20180423000944
VA
4789975806
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
Uva Community Health Medical Group Llc
8640 Sudley Rd, Manassas, VA 201104404
Phone: 7033695959
Secondary Practice Locations
8700 Sudley Rd, Prince William Hospital
Manassas, VA 201104418
Phone: 7039260909
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine - Cardiovascular Disease
Doctor of Medicine (M.D.)
Nurse Practitioner - Adult Health
Internal Medicine - Cardiovascular Disease
Nurse Practitioner - Family
NURSEPRACTITIONER
Nurse Practitioner - Acute Care
Registered Nurse, CCRN
Internal Medicine - Cardiovascular Disease
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at PO BOX 748613, ATLANTA, GA 303848613
Recorded as JAN WILLIAMS, ACNP, APRN, BC
Registered at 8640 SUDLEY RD STE 302, MANASSAS, VA 201104404 (Tel: 7033695959)
Registered at PO BOX 60447, CHARLOTTE, NC 282600447 (Tel: 7033695959)
Nurse Practitioner (license number reported to NPPES: NC 0024166796)
NPI status registered as active in NPPES database
Registered at 8700 SUDLEY RD, PRINCE WILLIAM HOSPITAL, MANASSAS, VA 201104418 (Tel: 7039260909)
Registered at 54 BERTRAM BLVD, STAFFORD, VA 225566464 (Tel: 5406595267)
Recorded as JAN GRIFFIN, ACNP, APRN, BC
Nurse Practitioner (license number reported to NPPES: VA 24166796)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Nurse Practitioners in Manassas
- Janelle Irizarry, APRN, AGNP
- Sarah Brady, NP-C
- Charleen Nosar, ANP
- Susan Campbell, ANP
- Dana Mohl, FNP
- Theresa Ganoe, ACNP-BC
Mailing Address
Po Box 748613
Atlanta, GA 303848613