Dr. William Allen Marshall, MD
- Medicare services, 2024
- 1,256
- Medicare patients, 2024
- 316
- Part D claims, 2024
- 388
- Hospital affiliations
- 5
- Industry payments
- $11,640
- Practice address
- 10215 Fernwood Rd, Bethesda, MD 20817
- Practice phone
- Call (301) 530-1010
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Orthobethesda
Bethesda, Maryland
Find Dr. Marshall's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William Allen Marshall is an orthopedic surgeon in Bethesda, Maryland
Dr. Marshall practices at Orthobethesda in Bethesda, Maryland.
Dr. Marshall's NPI, 1750731998, was assigned on June 19, 2016. Dr. Marshall holds Tennessee license 62780.
- NPI
- 1750731998NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6608161930
- NPI enumeration date
- June 19, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (301) 530-1010
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Allen Marshall practices at Orthobethesda in Bethesda, Maryland
Dr. Marshall's primary practice is Orthobethesda, at 10215 Fernwood Rd, Bethesda, MD 20817 in Montgomery County. The practice phone is (301) 530-1010.
- Orthobethesda10215 Fernwood Rd, Bethesda, MD 20817 · Montgomery CountyPhone(301) 530-1010
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William Allen Marshall is affiliated with 12 sites of care and 1 medical group
Dr. Marshall's primary practice is Orthobethesda in Bethesda, Maryland. Dr. Marshall is also affiliated with Sentara Leigh Hospital. The medical group on file is OrthoBethesda. Dmand AI also links Dr. Marshall to 4 more hospitals, 5 home health agencies and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William Allen Marshall's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marshall practices, 11 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Orthobethesda | Available with a free account |
| +11 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William Allen Marshall is one of 404 orthopedic surgeons in Maryland
Orthopaedic surgery is Dr. Marshall's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Marshall's licenses on file in 2 states: Tennessee and South Carolina.
Specialties and state licenses
- Orthopaedic surgery, TennesseePrimary
- South Carolina license
Orthopedic surgeons near Dr. Marshall
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 Allen Marshall billed Medicare for 1,256 services in 2024
CMS data shows 1,256 Medicare services from Dr. Marshall across 18 procedure codes in 2024, for 316 Medicare patients. Medicare paid $81,766 for them.
Dr. Marshall's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 2392024: 40670%
- Office and hospital visits
- 2023: 3872024: 3952%
- Imaging
- 2023: 2502024: 33434%
- Surgery
- 2023: 1282024: 1215%
Where Dr. Marshall's Medicare services took place, 2024
- In an office1,21497%
- In a facility423%
Dr. Marshall compared with the Maryland median for orthopedic surgeons, 2024
- Dr. Marshall
- Maryland median
- Medicare services
- 1,256vs 1,3436% below
- Medicare patients
- 316vs 3438% below
- Part D claims
- 333vs 903.7 times
Medians across 368 orthopedic surgeons in Maryland with Dmand AI profiles that report each measure.
Dr. Marshall'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.
Need commercial claims for Dr. Marshall?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marshall and other orthopedic surgeons in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Allen Marshall treated 316 Medicare patients in 2024, average age 75
CMS counts 316 Medicare patients who saw Dr. Marshall in 2024. The largest group is 65 to 74, with 149 patients. 75% of them have arthritis, and 75% have high blood pressure. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marshall's median patient age at 70, with 62% women.
Dr. Marshall's Medicare patients by age, 2024
Dr. Marshall's Medicare patients by sex, 2024
- Women19461%
- Men12239%
Chronic conditions among Dr. Marshall's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Diabetes32%
- Chronic kidney disease25%
- Mood disorders23%
- Ischemic heart disease22%
- Anxiety20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marshall's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women62%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Allen Marshall wrote 388 Medicare Part D claims in 2024
In 2024, Dr. Marshall wrote 388 Medicare Part D claims for 142 patients. 99% of them were for generic drugs. CMS names the drug for 333 of them, across 9 drugs with 11 or more claims each, at $2,665 in total drug cost. In 2023, CMS named 491 claims across 10 drugs.
Dr. Marshall's Part D claims by kind of drug, 2024
- Generic384 claims99%
- Brand-name and other4 claims1%
Dr. Marshall'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. Marshall's Part D claims, 2024
- Opioids24%94 of 388 claims
- Antibiotics14%54 of 388 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: 4912024: 33332%
Drugs named by CMS: 9 in 2024, 10 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 Allen Marshall ranks in the 96th percentile for hip replacement in Medicare
Dr. Marshall accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 89 procedures of hip replacement by Dr. Marshall, more than 96% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Marshall ranks in Medicare procedure volume
- Hip replacement
- 96th percentile89 procedures
- Knee replacement
- 90th percentile84 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. William Allen Marshall received $11,640 in industry payments from 2017 to 2025
CMS Open Payments shows 77 general payments to Dr. Marshall from 16 drug and device companies from 2017 to 2025. Travel and lodging make up the largest share, 37% of the total. Peerless Surgical Inc. paid the most, $2,450.
General payments to Dr. Marshall by program year, 2017 to 2025
General payments to Dr. Marshall by kind, 2017 to 2025
- Travel and lodging$4,36037%
- Food and beverage$3,35429%
- Education$2,42621%
- Speaker and faculty fees$1,50013%
Companies that paid Dr. Marshall the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Allen Marshall'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Allen Marshall
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 Allen Marshall's NPI number?
Dr. William Allen Marshall's NPI number is 1750731998. It was assigned on June 19, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. William Allen Marshall?
Dr. William Allen Marshall is an orthopedic surgeon in Bethesda, Maryland. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. William Allen Marshall practice?
Dr. Marshall practices at 10215 Fernwood Rd, Bethesda, MD 20817. Dr. Marshall's primary practice is Orthobethesda in Bethesda, Maryland. Dmand AI also links Dr. Marshall to 4 hospitals, 5 home health agencies and 1 group practice or clinic.
What is Dr. William Allen Marshall's office phone number?
The practice phone on file for Dr. Marshall is (301) 530-1010.
What is Dr. William Allen Marshall's medical license number?
Dr. Marshall holds Tennessee license 62780, one of the licenses on file in 2 states.
Which states has Dr. William Allen Marshall been licensed in?
Dmand AI has state licenses on file for Dr. Marshall in Tennessee and South Carolina.
Which hospitals is Dr. William Allen Marshall affiliated with?
Dr. Marshall is affiliated with Sentara Leigh Hospital. Dmand AI links Dr. Marshall to 4 more hospitals.
What medical group is Dr. William Allen Marshall part of?
Dr. Marshall is linked to OrthoBethesda.
Does Dr. William Allen Marshall accept Medicare?
Yes. CMS data shows Dr. Marshall billed Medicare for 1,256 services in 2024, and Dr. Marshall accepts Medicare assignment.
How many Medicare patients does Dr. William Allen Marshall see?
CMS counts 316 Medicare patients who saw Dr. Marshall in 2024, with an average age of 75.
Show 4 more questionsShow fewer questions
What services does Dr. William Allen Marshall bill to Medicare?
In 2024, Dr. Marshall's most billed Medicare services were injected or infused drug (J3301), diagnostic imaging (73564) and office visit, established patient (99213).
What drugs does Dr. William Allen Marshall prescribe most?
In 2024 Medicare Part D data, Dr. Marshall's most prescribed drugs by claims were Meloxicam, Celecoxib and Oxycodone HCl.
Has Dr. William Allen Marshall received payments from drug or device companies?
CMS Open Payments shows $11,640 in general payments to Dr. Marshall from 16 companies from 2017 to 2025. The largest total came from Peerless Surgical Inc.
How long has Dr. William Allen Marshall been practicing?
Dr. Marshall graduated from medical school in 2016, 10 years ago.
Selling to orthopaedic surgery practices?
See orthopedic surgeons in Maryland by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card