Dr. William Randolph Mook, MD
- Medicare services, 2024
- 6,628
- Medicare patients, 2024
- 551
- Part D claims, 2024
- 152
- MIPS score, 2024
- 91
- Hospital affiliations
- 2
- Practice address
- 1850 Town Center Parkway, Reston, VA 20190
- Practice phone
- Call (703) 689-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mook's professional email, personal email and mobile number
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Dr. William Randolph Mook is an orthopedic surgeon in Reston, Virginia
Dr. Mook practices at Reston Hospital Center in Reston, Virginia, part of HCA Healthcare.
Dr. Mook's NPI, 1528201134, was assigned on April 13, 2009. Dr. Mook graduated from University of Virginia School of Medicine in 2009. Dr. Mook holds Virginia license 0101258773.
- NPI
- 1528201134NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5193030625
- NPI enumeration date
- April 13, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (703) 689-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Randolph Mook practices at Reston Hospital Center in Reston, Virginia
Dr. Mook's primary practice is Reston Hospital Center, at 1850 Town Center Parkway, Reston, VA 20190 in Fairfax County. The practice phone is (703) 689-9000.
- Reston Hospital Center1850 Town Center Parkway, Reston, VA 20190 · Fairfax CountyPhone(703) 689-9000
Source: Dmand AI Affiliation Data
Dr. William Randolph Mook is affiliated with 2 sites of care and 2 medical groups
Dr. Mook's primary practice is Reston Hospital Center in Reston, Virginia, part of HCA Healthcare. Dr. Mook is also affiliated with Inova Fair Oaks Hospital. The medical group on file is OrthoVirginia. Dmand AI also links Dr. Mook to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Randolph Mook's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mook practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Reston Hospital Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Randolph Mook is one of 498 orthopedic surgeons in Virginia
Orthopaedic surgery is Dr. Mook's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Mook's licenses on file in 2 states: Virginia and Colorado.
Specialties and state licenses
- Orthopaedic surgery, VirginiaPrimary
- Sports medicine (orthopaedic surgery), Colorado
Orthopedic surgeons near Dr. Mook
Counts of orthopedic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William Randolph Mook billed Medicare for 6,628 services in 2024
CMS data shows 6,628 Medicare services from Dr. Mook across 17 procedure codes in 2024, for 551 Medicare patients. Medicare paid $202,909 for them.
Dr. Mook's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 2,6802024: 4,82480%
- Office and hospital visits
- 2023: 7332024: 85216%
- Imaging
- 2023: 4842024: 4983%
- Surgery
- 2023: 4412024: 4543%
Where Dr. Mook's Medicare services took place, 2024
- In an office6,51198%
- In a facility1172%
Dr. Mook compared with the Virginia median for orthopedic surgeons, 2024
- Dr. Mook
- Virginia median
- Medicare services
- 6,628vs 1,1705.7 times
- Medicare patients
- 551vs 37049% above
- Part D claims
- 107vs 12112% below
Medians across 475 orthopedic surgeons in Virginia with Dmand AI profiles that report each measure.
Dr. Mook's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mook and other orthopedic surgeons in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Randolph Mook treated 551 Medicare patients in 2024, average age 75
CMS counts 551 Medicare patients who saw Dr. Mook in 2024. The largest group is 65 to 74, with 272 patients. 75% of them have arthritis, and 75% have high cholesterol. 4% are also on Medicaid. Their average risk score is 0.87, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mook's median patient age at 56, with 47% women.
Dr. Mook's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mook's Medicare patients by sex, 2024
- Women33461%
- Men21739%
Chronic conditions among Dr. Mook's Medicare patients, 2024
- Arthritis75%
- High cholesterol75%
- High blood pressure68%
- Ischemic heart disease23%
- Diabetes22%
- Anxiety19%
- Osteoporosis19%
- Mood disorders18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mook's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women47%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Randolph Mook wrote 152 Medicare Part D claims in 2024
In 2024, Dr. Mook wrote 152 Medicare Part D claims for 96 patients. 99% of them were for generic drugs. CMS names the drug for 107 of them, across 4 drugs with 11 or more claims each, at $876 in total drug cost. In 2023, CMS named 50 claims across 2 drugs.
Dr. Mook's Part D claims by kind of drug, 2024
- Generic150 claims99%
- Brand-name and other2 claims1%
Dr. Mook's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Mook's Part D claims, 2024
- Opioids11%17 of 152 claims
- Antibiotics20%31 of 152 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 502024: 107114%
Drugs named by CMS: 4 in 2024, 2 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. William Randolph Mook scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Mook for performance year 2024, reported as part of a group. Dr. Mook accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 62 procedures of upper limb (arm) arthroscopy (minimally invasive joint repair) by Dr. Mook, more than 90% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Mook's MIPS scores, performance year 2024
- 91of 100Final score
- 90.7of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 79of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Mook ranks in Medicare procedure volume
- Upper limb (arm) arthroscopy (minimally invasive joint repair)
- 90th percentile62 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Lower limb (leg) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. William Randolph Mook received $17,833 in industry payments from 2016 to 2025
CMS Open Payments shows 91 general payments to Dr. Mook from 15 drug and device companies from 2016 to 2025. Grants make up the largest share, 56% of the total. Arthrex, Inc. paid the most, $11,740.
General payments to Dr. Mook by program year, 2016 to 2025
General payments to Dr. Mook by kind, 2016 to 2025
- Grants$10,00056%
- Travel and lodging$3,44719%
- Food and beverage$3,35119%
- Education$1,0356%
Companies that paid Dr. Mook the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Randolph Mook graduated from University of Virginia School of Medicine
Dr. Mook graduated from University of Virginia School of Medicine in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Randolph Mook's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William Randolph Mook
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William Randolph Mook's NPI number?
Dr. William Randolph Mook's NPI number is 1528201134. It was assigned on April 13, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. William Randolph Mook?
Dr. William Randolph Mook is an orthopedic surgeon in Reston, Virginia. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. William Randolph Mook practice?
Dr. Mook practices at 1850 Town Center Parkway, Reston, VA 20190. Dr. Mook's primary practice is Reston Hospital Center in Reston, Virginia, part of HCA Healthcare. Dmand AI also links Dr. Mook to 1 medical group.
What is Dr. William Randolph Mook's office phone number?
The practice phone on file for Dr. Mook is (703) 689-9000.
What is Dr. William Randolph Mook's medical license number?
Dr. Mook holds Virginia license 0101258773, one of the licenses on file in 2 states.
Which states has Dr. William Randolph Mook been licensed in?
Dmand AI has state licenses on file for Dr. Mook in Virginia and Colorado.
Which hospitals is Dr. William Randolph Mook affiliated with?
Dr. Mook practices at Reston Hospital Center in Reston, Virginia. Dr. Mook is also affiliated with Inova Fair Oaks Hospital.
What medical group is Dr. William Randolph Mook part of?
Dr. Mook is linked to OrthoVirginia. Dmand AI links Dr. Mook to 1 more medical group.
Does Dr. William Randolph Mook accept Medicare?
Yes. CMS data shows Dr. Mook billed Medicare for 6,628 services in 2024, and Dr. Mook accepts Medicare assignment.
What is Dr. William Randolph Mook's MIPS score?
Dr. Mook's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. William Randolph Mook see?
CMS counts 551 Medicare patients who saw Dr. Mook in 2024, with an average age of 75.
What services does Dr. William Randolph Mook bill to Medicare?
In 2024, Dr. Mook's most billed Medicare services were injected or infused drug (J3301), injected or infused drug (J7318) and office visit, established patient (99214).
Where did Dr. William Randolph Mook go to medical school?
Dr. Mook graduated from University of Virginia School of Medicine in 2009.
What drugs does Dr. William Randolph Mook prescribe most?
In 2024 Medicare Part D data, Dr. Mook's most prescribed drugs by claims were Diclofenac Sodium, Amoxicillin and Methylprednisolone.
Has Dr. William Randolph Mook received payments from drug or device companies?
CMS Open Payments shows $17,833 in general payments to Dr. Mook from 15 companies from 2016 to 2025. The largest total came from Arthrex, Inc.
How long has Dr. William Randolph Mook been practicing?
Dr. Mook graduated from medical school in 2009, 17 years ago.
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